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Effect of metallic ions on dispersibility of fine diaspore 认领 引用 被引量：7
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作者 周瑜林 胡岳华 王毓华 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第5期1166-1171,共6页
Dispersion experiments were conducted to study the influence of metallic cations on the dispersibility of diaspore. The reaction mechanisms were investigated based on the analysis of zeta （ξ） potential and calculat... Dispersion experiments were conducted to study the influence of metallic cations on the dispersibility of diaspore. The reaction mechanisms were investigated based on the analysis of zeta （ξ） potential and calculations of solution chemistry and DLVO theory. The results show that the valence of cations, instead of the cation type, plays an important role in the dispersibility of diaspore The impact of multivalent metallic cations is greater than that of monovalent cations. In the presence of Ca^2＋ and Mg^2＋, the dispersion of diaspore doesn＇t change in the range of pH value below 10. However, Ca^2＋ and Mg^2＋ may induce strong coagulation of particles when pH value is higher than 10. The adsorption of species of calcium and magnesium ions on diaspore can cause the compression of electric double layer, the decrease of the absolute value of zeta potential and the repulsion force between diaspore particles. The new IEP （isoelectric point） appeared at pH value of 11 may attribute to the adsorption of Mg（OH）2（s）. 展开更多
关键词 diaspore metallic ions dispersibility zeta potential DLVO theory
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Enhanced dispersibility and thermal stability of β-cyclodextrin functionalized graphene 认领 引用 被引量：4
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作者 Shu-Peng Zhang Bin Liu +5 位作者 Cheng-Yin Li Wei Chen Zhi-Jian Yao Dong-Ting Yao Rong-Bing Yu Hai-Ou Song 《Chinese Chemical Letters》 SCIE CAS CSCD 2014年第2期355-358,共4页
A series of β-cyclodextrin （CDs） functionalized graphene nanohybrids have been successfully fabricated utilizing the classical covalent modification methods at different reaction temperatures. It is very interestin... A series of β-cyclodextrin （CDs） functionalized graphene nanohybrids have been successfully fabricated utilizing the classical covalent modification methods at different reaction temperatures. It is very interesting that although both CDs and graphene oxide （GO） could he easily decomposed, the effective combination of GO with CDs leads to significantly enhanced thermal stability of graphene derivatives （GO-CDs）. Moreover, the introduction of CDs could dramatically improve the dispersibility promotion of our products in both polar/protic and nonpolar/aprotic solvents, which will contribute to the preparation of polymer nanocomposites and increase of their thermal stability. The improved thermal degradation temperatures can be obtained for polyvinyl alcohol after filling with as little as 1 wt.% of the hybrid. The obtained products could be potentially used in heat-retardant or thermal-control materials. 展开更多
关键词 β-Cyclodextrin Functionalized graphene Dispersibility Thermal stability
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Improving the Dispersibility of Poly(urea-formaldehyde) Microcapsules for Self-Healing Coatings Using Preparation Process 认领 引用 被引量：3
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作者 Yuhao Jiang Jialan Yao Chengfei Zhu 《Journal of Renewable Materials》 EI CAS 2022年第1期135-148,共14页
Poly(urea-formaldehyde)(PUF)microcapsules were prepared by in-situ polymerization with four different pro-cesses in this paper.The chemical composition,surface morphology,particle size distribution,and thermal sta-bil... Poly(urea-formaldehyde)(PUF)microcapsules were prepared by in-situ polymerization with four different pro-cesses in this paper.The chemical composition,surface morphology,particle size distribution,and thermal sta-bility were characterized by FTIR,SEM,particle size analyzer,and TGA,respectively.The results demonstrated that the agglomeration of the PUF microcapsules was related to the agglomeration of the emulsion particles caused by the changes of emulsion interface during the shell polymerization.Due to the slow deposition of the shell material,the PUF microcapsules with the core-shell structure prepared by the process with ammonium chloride as the last additive showed good dispersibility with an average diameter of 6.36μm,high core content of 71.3 wt%,and high yield of 61.3 wt%.The PUF microcapsules had good thermal stability below 216?C.The PUF microcapsules could be uniformly dispersed in the epoxy coating in a single form.The epoxy coating with 2 wt%PUF microcapsules showed good self-healing property,and the service life of the coating was about doubled. 展开更多
关键词 In-situ polymerization self-healing microcapsules anticorrosion dispersibility coatings
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A hydrophobic peptide fraction that enhances the water dispersibility of curcumin 认领 引用
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作者 Risa Yamashita Tatsuya Oshima Yoshinari Baba 《Asian Journal of Pharmaceutical Sciences》 SCIE CAS 2016年第5期631-640,共10页
The present study describes the complexation between curcumin(Cur) and a peptide mixture(Pep). Pep was prepared by enzymatic hydrolysis of casein and used as an excipient for poorly water-soluble Cur. An aqueous solut... The present study describes the complexation between curcumin(Cur) and a peptide mixture(Pep). Pep was prepared by enzymatic hydrolysis of casein and used as an excipient for poorly water-soluble Cur. An aqueous solution of Pep and an acetone solution of Cur were mixed and lyophilized to obtain a white-yellow powder of the peptide and Cur complex(CurPep). The water dispersibility of Cur was enhanced by the complexation with Pep. Pep was fractionated using ammonium sulfate precipitation and ultrafiltration to identify which peptides preferentially interact with Cur. Relatively hydrophobic peptides with high molecular weights(>5 k Da) were more effective in enhancing the water dispersibility of Cur than other fractions. Cur-Pep dispersed under acidic and neutral conditions, at which amphoteric Pep is positively or negatively charged. Cur-Pep exists as a hydrocolloid with particle size 160–330 nm in aqueous media. 展开更多
关键词 Curcumin Peptide Dispersibility Complexation Hydrocolloid
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Dispersibility, Shape and Magnetic Properties of Nano-Fe3O4Particles 认领 引用 被引量：3
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作者 Xiaojuan Liang Haowei Shi +2 位作者 Xiangchen Jia Yuxiang Yang Xiangnong Liu 《Materials Sciences and Applications》 2011年第11期1644-1653,共10页
Nano-Fe3O4 particles were prepared by a two-step microemulsion method, the influence of molar ratio of water to NP-5 (R), alkali concentration and temperature on dispersibility and shape of the nanoparticles were disc... Nano-Fe3O4 particles were prepared by a two-step microemulsion method, the influence of molar ratio of water to NP-5 (R), alkali concentration and temperature on dispersibility and shape of the nanoparticles were discussed. Magnetic studies were also carried out using VSM in this paper. It was found that the optimum preparation parameters are R = 6.0, alkali concentration = 2.5 mol.L–1, initial total iron concentration as 0.88 mol.L–1, and the temperature being 30°C, the prepared nano magnetite particles have uniform size and good dispersibility with a crystal structure belonging to cubicFe3O4 and lattice parameters of a = 8.273 ?. The results of magnetic studies show, magnetic properties of particles are influenced by dispersibility of nanoparticles which depends on size of clusters. The better dispersibility of nanoparticles leads to more ordered inner magnetic vector, and so the stronger magnetic behavior of nano-Fe3O4 particles. 展开更多
关键词 Nano-Fe3O4 Particle Dispersibility of Nanoparticles Magnetic Properties Saturation Magnetization
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Ultrahigh-Mass-Loading Electrodes With Enhanced Homogeneity Using a High-Concentration Slurry for Lithium-Ion Batteries 认领 引用
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作者 Jun Kyu Park Woohyeon Shin +14 位作者 Woohyeon Jo Hyo-Jeong Lee Won-Yong Jeon Jinho Ahn Jihee Yoon Yea-Ji Jeong Joonyoung Oh Minji Kang Min-Jae Choi Jin Joo Jongsoon Kim Seong-Keun Cho Jun Dong Park Jaewook Nam Jung-Keun Yoo 《Carbon Energy》 SCIE EI CAS CSCD 2026年第1期126-137,共12页
Strategies for achieving high-energy-density lithium-ion batteries include using high-capacity materials such as high-nickel NCM,increasing the active material content in the electrode by utilizing high-conductivity c... Strategies for achieving high-energy-density lithium-ion batteries include using high-capacity materials such as high-nickel NCM,increasing the active material content in the electrode by utilizing high-conductivity carbon nanotubes(CNT)conductive materials,and electrode thickening.However,these methods are still limited due to the limitation in the capacity of high-nickel NCM,aggregation of CNT conductive materials,and nonuniform material distribution of thick-film electrodes,which ultimately damage the mechanical and electrical integrity of the electrode,leading to a decrease in electrochemical performance.Here,we present an integrated binder-CNT composite dispersion solution to realize a high-solids-content(>77 wt%)slurry for high-mass-loading electrodes and to mitigate the migration of binder and conductive additives.Indeed,the approach reduces solvent usage by approximately 30%and ensures uniform conductive additive-binder domain distribution during electrode manufacturing,resulting in improved coating quality and adhesive strength for high-mass-loading electrodes(>12 mAh cm−2).In terms of various electrode properties,the presented electrode showed low resistance and excellent electrochemical properties despite the low CNT contents of 0.6 wt%compared to the pristine-applied electrode with 0.85 wt%CNT contents.Moreover,our strategy enables faster drying,which increases the coating speed,thereby offering potential energy savings and supporting carbon neutrality in wet-based electrode manufacturing processes. 展开更多
关键词 cathodes dispersibility dispersion solution high-mass-loading lithium-ion batteries
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Interfacial plugging of shale microfractures using functionalized graphene oxide with high dispersion stability under harsh conditions 认领 引用 被引量：1
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作者 Dao-Xiong Li Yang Bai +5 位作者 Cheng Wang Na Su Ling-Feng Wu Deng Gu Yu-Fen Zhai Ping-Ya Luo 《Petroleum Science》 SCIE EI CAS CSCD 2026年第1期422-433,共12页
Shale gas development often suffers from wellbore instability due to microfractures in the formation,posing serious challenges to drilling safety and efficiency.This study presents a functionalized graphene oxide(GO-P... Shale gas development often suffers from wellbore instability due to microfractures in the formation,posing serious challenges to drilling safety and efficiency.This study presents a functionalized graphene oxide(GO-PAA)nanomaterial,prepared by grafting hydrophilic polyacrylic acid(PAA)chains onto GO surfaces to enhance dispersion stability under high salinity,elevated temperature,and wide pH conditions.The results indicate that GO-PAA effectively resists charge-shielding effects under conditions of high salinity,elevated temperature,and a wide pH range,significantly reducing the risk of particle aggregation.Even at high salt concentrations,the zeta potential remains below-32.8 mV,demonstrating good colloidal stability.Plugging performance was evaluated using simulated core experiments.GO-PAA fo rmed a"band-aid"like barrier on shale microfracture surfaces,reducing permeability by up to57.53%,nearly twice that of conventional spherical nano particles.Scanning electron microscope(SEM)and elemental analysis confirmed the formation of a dense and uniform plugging layer.The synergistic interaction between GO's 2D lamellar structure and the flexible polymer chains facilitated effective surface adhesion and coverage.This adsorption-adhesion plugging mechanism represents a shift from traditional bridging theories,enabling reduced material usage and improved efficiency.The findings provide theo retical and practical support for designing high-perfo rmance nanoplugging agents in waterbased drilling fluids,contributing to safer and more sustainable shale gas development. 展开更多
关键词 Functionalized GO Stable dispersion Interfacial plugging Nanoplugging agent Shale microfractures
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Simplified K-linearization and dispersion compensation method for low-cost real-time serial sectioning-swept source optical coherence tomography 认领 引用 被引量：1
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作者 Wei Chen Lingxuan Meng +2 位作者 Xiuhua Zheng Shuaibin Chang Jianbo Tang 《Journal of Innovative Optical Health Sciences》 SCIE EI CSCD 2026年第3期82-89,共8页
Swept-Source Optical Coherence Tomography(SS-OCT)requires linear k-space sampling and dispersion compensation to achieve optimal axial resolution,typically necessitating expensive,high-speed data acquisition hardware.... Swept-Source Optical Coherence Tomography(SS-OCT)requires linear k-space sampling and dispersion compensation to achieve optimal axial resolution,typically necessitating expensive,high-speed data acquisition hardware.Existing numerical methods are computationally intensive,hindering real-time imaging.While phase linearization offers a simpler alternative,its applicability is limited to shallow depths.Here,we demonstrate that for serial sectioning and imaging,where the region of interest is confined to a few hundred micrometers,phase linearization is highly effective.We developed a simplified workflow that enables real-time reconstruction without added processing time.Using a commercial swept source,we maintained a sharp axial point spread function over a 700μm depth,sufficient for visualizing fine brain structures in mice.Our method allows for video-rate display using cost-effective,low-sampling-rate hardware. 展开更多
关键词 K-linearization dispersion compensation phase linearization
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Comprehensive Analysis of the Relative Dispersion of Droplet-Size Distributions and Their Relationships to Key Physical Fog Processes Under Different Aerosol Conditions and Evolutionary Stages 认领 引用
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作者 Xingcan JIA Chunsong LU +7 位作者 Zhiheng LIAO Ping TIAN Yuan WANG Fei WANG Shuai YANG Youjun DOU Xiange LIU Yangang LIU 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2026年第4期861-873,I0042-I0046,共13页
The relative dispersion of cloud and fog droplets has significant impacts on aerosol indirect effects,radiative transfer,and microphysical processes.However,previous studies have been mostly concerned with clouds,with... The relative dispersion of cloud and fog droplets has significant impacts on aerosol indirect effects,radiative transfer,and microphysical processes.However,previous studies have been mostly concerned with clouds,with limited studies on fog,particularly those that examine the combined influences of all key physical processes and their roles during fog evolution.As such,this study aims to conduct a comprehensive investigation by examining the relationships between relative dispersion and other microphysical variables,as well as the underlying microphysical and dynamic processes,based on field fog campaigns in polluted and clean conditions.In polluted fog,droplet concentrations are higher,leading to smaller droplets and increased dispersion.The correlation between dispersion and droplet volume-mean radius is positive in the polluted fog,but shifts to negative in clean fog.We attribute the difference to various microphysical processes like aerosol activation,condensation,collision-coalescence,and entrainment-mixing.In polluted fog,high aerosol concentrations,low supersaturations,and strong turbulence(entrainment-mixing)provide suitable conditions for the simultaneous occurrence of droplet condensation and aerosol activation,resulting in a positive correlation between dispersion and volume-mean radius,especially during the fog formation stage.In contrast,during the mature stage in clean fog,condensation is dominant with weak aerosol activation leading to a negative correlation between relative dispersion and volume-mean radius.The collision-coalescence process is more active in the mature stage,increasing radii and leading to the negative correlation between dispersion and volume-mean radius.This result sheds new light on understanding the relative dispersion and mechanisms in fog under different aerosol backgrounds. 展开更多
关键词 fog relative dispersion evolutionary stage aerosol activation collision-coalescence
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Overcoming oxidation and enhancing dispersion of nanoparticles via molten salt:Configurational distribution of TiCnpin pure Mg 认领 引用
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作者 Xuanchang Zhang Xiaojun Wang +5 位作者 Nodir Turakhodjaevr Xuejian Li Hailong Shi Yuanyuan Zhang Xiaoshi Hu Chao Xu 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2026年第1期138-148,共11页
Nanoparticle-reinforced Mg matrix composites(NPMMCs)capitalize on the synergistic properties of nanoparticles and Mg matrix,resulting in enhanced mechanical attributes compared to matrix.Nonetheless,effective high-tem... Nanoparticle-reinforced Mg matrix composites(NPMMCs)capitalize on the synergistic properties of nanoparticles and Mg matrix,resulting in enhanced mechanical attributes compared to matrix.Nonetheless,effective high-temperature dispersion of nanoparticles remains challenging.This study employs a molten salt dispersant(NaCl-KCl-MgCl2)effectively mitigating the oxidation and combustion of TiC nanoparticles(TiCnp).Compared with the atmosphere,the molten salt facilitates the pre-dispersion of TiCnpthrough thermal motion at elevated temperatures,thereby reducing agglomeration between the TiCnp.Simultaneously,the molten salt effectively wets and disrupts the oxide layer on the surface of Mg melt,facilitating the wetting of TiCnpby the Mg melt.The successful incorporation of 3 vol.%TiCnpinto the Mg matrix is achieved by utilizing molten salt,and the addition of TiCnpincreases the viscosity of mg melt.Further dispersed by ultrasonic dispersion,the unique distribution of TiCnpwithin ring-like structures was obtained which was attributed to the increase of viscosity.As a configurational distribution,the ring-like TiCnpdistribution morphology significantly enhances the mechanical properties of composites,as evidenced by an approximate 50%increase in compressive strength(UCS). 展开更多
关键词 Molten salt Mg composites Ultrasonic dispersion Tic nanoparticles Heterostructure
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Biomimetic inspired superhydrophobic nanofluids:Enhancing wellbore stability and reservoir protection in shale drilling 认领 引用
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作者 Jin-Sheng Sun Ting Liao +7 位作者 Yu-Xi Ji Hang Li Yuan-Zhi Qu Xian-Bin Huang Kai-He Lv Yu-Cai Luo Bo Zhang Jian Li 《Petroleum Science》 SCIE EI CAS CSCD 2026年第1期236-244,共9页
Shale oil and gas,as typical unconventional resources,have gradually altered the global energy supply and demand landscape,attracting significant attention over recent decades.However,challenges such as wellbore insta... Shale oil and gas,as typical unconventional resources,have gradually altered the global energy supply and demand landscape,attracting significant attention over recent decades.However,challenges such as wellbore instability and reservoir damage caused by drilling fluids invasion during shale drilling remain unresolved.In this study,we reported the synthesis and preparation of biomimetic inspired superhydrophobic nanofluids(SHN)with multiple functions by utilizing nano-silica,low surface energy fluorinated compounds,and cationic compounds with adsorption capabilities.Firstly,SHN with nano effects could plug micro-nano pores in shale,thereby reducing the filtration loss of drilling fluids(from24 to 11 mL).Furthermore,SHN could adhere to shale surfaces through electrostatic interactions to increase its roughness from 1.121 to 3.567μm,thereby transforming the shale surface from hydrophilic(26.4°)to superhydrophobic(152.8°).This not only reduced self-priming by 83.7%and decreased the capillary rise height to 5 mm below the liquid surface but also suppressed hydration expansion and improved the rolling recovery rate by 84.74%.Overall,this study provided new insights into the design and manufacturing of high-performance drilling fluids materials that could support wellbore stability and reservoir protection during shale oil and gas drilling processes. 展开更多
关键词 Shale Superhydrophobic nanofluids Wetting inversion Reduce self-priming Inhibit hydration dispersion
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Synthesis of biopolymer nanocomposites and experimental investigation on enhanced oil recovery 认领 引用
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作者 Bo Wang Shu-Yuan Deng +5 位作者 Hao Zeng Feng-Peng Lai Qing Feng Xiao-Nan Li Yue-Hui She Fan Zhang 《Petroleum Science》 SCIE EI CAS CSCD 2026年第1期496-513,共18页
Nanoparticles(NPs)are widely used in the petroleum industry,particularly in upstream and downstream applications,due to their quantum effects and high surface area-to-volume ratio.However,stable dispersion and high in... Nanoparticles(NPs)are widely used in the petroleum industry,particularly in upstream and downstream applications,due to their quantum effects and high surface area-to-volume ratio.However,stable dispersion and high input ratios of NPs are critical factors limiting their application.This study thus synthesizes the biopolymer nanocomposite E-Ag NPs in one step using the metabolic product exopolysaccharide(EPS)from Bacillus subtilis as both a reducing and stabilizing agent.This study explored the potential of E-Ag NPs to enhance oil recovery in low-and medium-permeability formations.Experimental results showed that the average particle size of Ag NPs synthesized using EPS ranged from 20 to 50 nm.The presence of EPS resulted in a higher Zeta potential value(-43.4 mV),indicating improved stability of the nanofluid,effectively inhibiting NPs aggregation.Interfacial tension and wettability evaluation experiments demonstrated that E-Ag NPs exhibited excellent capabilities in reducing interfacial tension and altering wettability.In the enhanced oil recovery evaluation experiments,the imbibition experiment with E-Ag NPs achieved a maximum recovery rate of 54.32%,and the core flooding experiment reached a maximum recovery rate of 16.33%.In conclusion,the biopolymer nanocomposites developed by this method offer valuable guidance and reference for oilfield development,providing a green and efficient potential solution for enhanced oil recovery. 展开更多
关键词 Biosynthesis Nanoparticles Biopolymer nanocomposites Dispersion stability Enhanced oil recovery
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Numerical simulation of multi-gasbag propulsion system and attitude control of release unit based on two-phase flow method 认领 引用
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作者 Xinggan Lu Shenshen Cheng +2 位作者 Xiaoting Cui Kun Jiang Hao Wang 《Theoretical & Applied Mechanics Letters》 EI CAS CSCD 2026年第2期65-79,共15页
Collaborative technology for the remote,large-scale deployment of drones using dispersal systems holds significant potential in applications such as post-disaster rescue,which must balance low overload with high thrus... Collaborative technology for the remote,large-scale deployment of drones using dispersal systems holds significant potential in applications such as post-disaster rescue,which must balance low overload with high thrust,in addition to precisely controlling the separation attitude.To address these issues,this paper introduces a multi-gasbag propulsion system with a high aspect ratio that coordinates multiple gasbags to generate sufficient thrust.By adjusting the inlet size of the gasbag,the separation behavior of the release unit can be accurately controlled.A multidimensional two-phase flow model is established,accompanied by both combustion and flow experiments and a double-gasbag propulsion experiment.The results demonstrate that the proposed mathematical model is accurate,effectively captures the pressure fluctuations and spatiotemporal distribution of flow field parameters,and determines the separation attitude of the release unit.For the cases studied in this paper,the pressure at the gasbag inlet(z=650 mm)is the dominant factor during the gasbag propulsion response,causing the release unit to rotate counterclockwise when the gasbag inlet sizes are identical.Increasing the inlet size at z=50 mm compensates for the adverse effects of uneven axial pressure distribution,thereby achieving a neutral separation for the release unit.When the radii r1 and r2 vary between 2 and 12 mm,the angular velocity and attitude angle of the release unit are found to range from-15.50 to 15.20 rad/s and from-0.109 to 0.106 rad,respectively. 展开更多
关键词 Two-phase flow Dispersal technology Parameter distribution Attitude control Numerical simulation
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Influence of mineral-water interaction on water nanodynamics in clays 认领 引用
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作者 Huihui Tian Weicheng Lai +2 位作者 Zhenyu Zhu Dongchuan Xue Changfu Wei 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2026年第4期2995-3002,共8页
The mineral-water interaction in soils makes pore water different behaviors from its bulk counterpart.However,no direct experimental observation on sediment-water interaction and nanodynamics of pore water is availabl... The mineral-water interaction in soils makes pore water different behaviors from its bulk counterpart.However,no direct experimental observation on sediment-water interaction and nanodynamics of pore water is available.With a 2D T₁–T₂map,nuclear magnetic relaxation dispersion(NMRD)models can be used to calculate water nanodynamics(T₁is the spin-lattice relaxation time and T₂is the spin-spin relaxation time).However,the application of the NMRD theories is limited because of the complex theoretical derivation.In this paper,two NMRD models(i.e.the BPP model and Korb model)are introduced to perform a comparative analysis of their performance in recovering the mineral-water interaction mechanism in clays.It is shown that compared with the BPP model,Korb model is more effective in quantifying water nanodynamics and soil-water interaction in soils.With Korb model,nanodynamics of adsorbed water are estimated.It is interesting to find that the adsorbed water of quartz and feldspar is less mobile than that of clay minerals.To shed insights into the effect of mineralogy on the nanodynamics of adsorbed water,we calculate the interaction energy between water molecules and soil particles.The results indicate that,in expansive clays,the binding energy of water is smaller than the diffusive barrier and the spin-lattice relaxation time(T₁)is limited by the water diffusing jumps at the particle surface.Whereas in silty clays,the binding energy is larger than the diffusive barrier and the T₁is limited by a thermally-activated exchange between water molecules bond to silanol groups at the pore surfaces and nearby diffusing water molecules. 展开更多
关键词 Nuclear magnetic relaxation dispersion Surface relaxivity Water nanodynamics Soil Thermally activated process
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Unraveling the invasion patterns of Galinsoga quadriradiata in mountain ranges:Insights from human activities,phenotypic and genetic variations 认领 引用
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作者 Yu Chen Xingjiang Song +5 位作者 Gang Liu Jia Wang Chunling Zhang Xiaojian Chang Jiabin Zou Zhihong Zhu 《Plant Diversity》 SCIE CAS CSCD 2026年第1期192-203,共12页
Prevention of biological invasion requires understanding how alien species invade native communities.Although studies have identified mechanisms that underlie plant invasion in some habitats,limited attention has focu... Prevention of biological invasion requires understanding how alien species invade native communities.Although studies have identified mechanisms that underlie plant invasion in some habitats,limited attention has focused on invasion patterns along elevational gradients.In this study,we asked which factors drive the global and regional distribution of the invasive plant Galinsoga quadriradiata along elevational gradients.To answer this question,we examined whether human activities(i.e.,roads)promote G.quadriradiata invasion,how seed dispersal-related traits of G.quadriradiata change along elevation gradients,and whether G.quadriradiata has adapted to high-elevation environments through phenotypic plasticity or genetic variation.On the global scale,we found that human activities and road density positively contribute to the G.quadriradiata expansion in mountainous areas.Field surveys in China revealed significant elevational differences in the seed dispersal traits of G.quadriradiata,with higher-elevation populations exhibiting lower dispersal ability and generally lower genetic diversity.Under common conditions,high-elevation populations showed higher leaf mass ratio but lower root mass ratio and reproductive allocation.This suggests that high-elevation environments create a barrier to dispersal for G.quadriradiata,and that G.quadriradiata has adapted phenotypically to these conditions.Our study indicates that the elevational invasion pattern of G.quadriradiata is shaped by multiple factors,particularly human activities and phenotypic adaptability.In addition,our finding that G.quadriradiata invasion at high elevations is not constrained by low genetic diversity indicates that monitoring and management of G.quadriradiata in mountainous areas should be strengthened. 展开更多
关键词 Invasive plants Phenotypic plasticity Seed dispersal ability Genetic variation Human activities Elevational gradient
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Assembling atomically dispersed tungsten co-catalysts on organometal halide perovskite for superior interfacial charge transfer and photocatalytic hydrogen production 认领 引用
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作者 Ting Xu Zexi Zhang +7 位作者 Shengliang Qi Hefeng Zhang Junhui Wang Yuying Gao Wenjun Fan Chenghua Sun Xu Zong Lianzhou Wang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第5期525-534,I0013,共10页
Intensifying the electronic metal-support interaction(EMSI)between organometal halide perovskites(OMHPs)photocatalysts and hydrogen evolution reaction(HER)co-catalyst is crucial for realizing efficient interfacial cha... Intensifying the electronic metal-support interaction(EMSI)between organometal halide perovskites(OMHPs)photocatalysts and hydrogen evolution reaction(HER)co-catalyst is crucial for realizing efficient interfacial charge transfer and solar-to-hydrogen(STH)conversion.Although atomically dispersed catalysts(ADCs)are prone to form stronger EMSI than nanoparticles with support,assembling ADCs on OMHPs remains a great challenge due to the ionic nature and thermal instability of OMHPs.Herein,we realize the design of two-dimensional(2D)OMHPP)loaded with nonnoble metal-based ADCs,namely tungsten ADCs(WADCs),for the first time.We show that WADCscoordinated with two sulfur and two oxygen atoms are anchored on the surface of PMA2PbI4via a W-O-Pb link.The resulting WADCs-decorated PMA2PbI4(WADCs/S-PMA2PbI4)exhibits an extraordinary interfacial charge transfer efficiency of 94.7%,which is much higher than that of Pt/PMA2PbI4(61.7%).Moreover,WADCscan effectively extend the lifetime of hot carriers and work as the active sites for HER.Consequently,WADCs/S-PMA2PbI4shows a photocatalytic HER activity superior to that of Pt/PMA2PbI4and 30 times that of bare PMA2PbI4with a record turnover frequency(TOF)of 516.3 h-1per W atom.This work opens a new avenue for designing cost-effective perovskite-based catalysts for solar hydrogen production. 展开更多
关键词 Atomically dispersed catalysts Organometal halide perovskites Photocatalytichydrogen production Co-catalyst Non-noble metal
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Influence of delay time on the blasting effect of multiple charging forms in single free-face rock masses 认领 引用
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作者 Chengxiao Li Renshu Yang +2 位作者 Jinjing Zuo Ye Zhu Ping Xie 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2026年第6期1807-1822,共16页
ln order to improve excavation efficiency,we considered coal mine rock roadway blasting excavation as a background to examine the influence of delay time on the blasting effect of different charging structures under s... ln order to improve excavation efficiency,we considered coal mine rock roadway blasting excavation as a background to examine the influence of delay time on the blasting effect of different charging structures under single free-surface conditions.Single-pore dispersed-charge models,dual-pore continuous-charge models,and dual-pore composite charge models were established.Their respective explosive rock-breaking mechanisms were explained using different models.These three numerical models were used to analyze the influence of delay time changes on the pressure and velocity of the measurement points near boreholes.The models were used to evaluate the blasting effects by determining the number of free-surface rocks.Engineering experiments were conducted to validate the numerical findings.The results showed that a single-hole dispersed charge creates a cavity and a new free surface,which increases the impact of deep-hole blasting compared to stress wave superposition.Dual-hole continuous-charge detonation is difficult,and short-delay detonation can effectively use stress wave superposition and prolong the action time of the explosive gas.The cavities created by the dispersed charges can be used to increase the efficiency of dual-hole composite charge blasting. 展开更多
关键词 underground mine blasting excavation delay blasting blasting cavity dispersed charge free surface
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Phosphorus leaching in alkaline soils:the role of soil texture and pore structure 认领 引用
18
作者 WANG Jie YANG Bangge +3 位作者 WEI Yujie ZHENG Hao XIONG Yi CAI Chongfa 《Journal of Mountain Science》 SCIE CSCD 2026年第2期583-596,共14页
Phosphorus(P)leaching in alkaline soils,exacerbated by excessive fertilizer application,represents a significant pathway for P loss.While soil pore structure and texture critically regulate P transport,mechanisms gove... Phosphorus(P)leaching in alkaline soils,exacerbated by excessive fertilizer application,represents a significant pathway for P loss.While soil pore structure and texture critically regulate P transport,mechanisms governing P loss in texturally diverse alkaline soils remain unclear.This study investigated P leaching dynamics and transport parameters across four alkaline soil textures(silty clay,clay loam,loam,sandy loam)using a one-dimensional convective-diffusion equation(CDE)based on column experiments.Results indicated that phosphorus leaching kinetics were predominantly governed by diffusion transport,evidenced by low Peclet numbers(Pe)(ranged from 0.02 to 0.31)across varying textures and initial P concentrations(C0).Comparative analysis of transport parameters revealed significant textural effects on dispersion coefficient(D),retardation factor(R),pore water velocity(V),Pe,and diffusion coefficient(λ)(F>523.42,p89.47,p<0.001).Saturated hydraulic conductivity(Ks)(R2=62.9%,p<0.01)and total pore area(A)(R2=12.4%,p<0.01)emerged as primary regulators of P leaching.Enhanced clay content increased total pore area while reducing average pore diameter,concurrently decreasing pore water velocity and saturated infiltration rates.These textural modifications amplified diffusive P transport within soil matrices.The findings provide mechanistic insights into texturedependent P mobility in alkaline environments,informing targeted strategies for agricultural phosphorus management. 展开更多
关键词 Soil phosphorus leaching Alkaline soil Soil texture Soil pore structure Convective dispersive equation
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Ru‐Ag Dual Atom Sites for Methane Detection Enabling Intelligent Thermal Runaway Warning in Lithium‐Ion Batteries 认领 引用
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作者 Tianshui Liang Weifang Ma +7 位作者 Yuhang Song Wenqi Hou Zongke Li Jiayi Liu Wen Wang Yang Jin Ronghan Wei Qiyan Wang 《Rare Metals》 SCIE EI CAS CSCD 2026年第2期733-744,共12页
Early detection of thermal runaway(TR)is essential for lithium-ion battery(LIB)safety,as unchecked TR risks catastrophic failures in energy storage systems.Gas-based sensing offers a faster and more direct approach by... Early detection of thermal runaway(TR)is essential for lithium-ion battery(LIB)safety,as unchecked TR risks catastrophic failures in energy storage systems.Gas-based sensing offers a faster and more direct approach by detecting decomposition products at the molecular level.CH4,a key early-emission gas,holds particular promise but remains difficult to detect at room temperature due to its chemical inertness.Here,we report a CH4 sensor based on atomically co-doped Ru and Ag on MoS2,where adjacent single-atom sites synergistically enhance CH4 adsorption and activation.The co-doped sensor exhibits up to 5-fold higher sensitivity than pristine MoS2,enabling reliable ppm level detection at ambient conditions.Integrated into a battery module,the sensor delivers an early thermal runaway warning 90 s ahead of temperature and voltage signals.Combined with control elements such as fans and alarms,this platform enables real-time safety management,significantly improving the reliability of LIBs in electric vehicles and grid storage. 展开更多
关键词 atomically dispersed CH4sensor lithium-ion battery safety Ru and Ag thermal runaway warning
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Investigation on the interaction of dispersed and elongated bubbles based on laser-induced fluorescence 认领 引用
20
作者 Ting XUE Ruini SHI +1 位作者 Haixia WANG Yan WU 《Optoelectronics Letters》 EI 2026年第2期124-128,共5页
The purpose of this paper is to investigate the interaction between dispersed and elongated bubbles in horizontal slug flow utilizing the laser-induced fluorescence method. A segmentation method based on the fuzzy C-m... The purpose of this paper is to investigate the interaction between dispersed and elongated bubbles in horizontal slug flow utilizing the laser-induced fluorescence method. A segmentation method based on the fuzzy C-mean(FCM) algorithm is proposed to effectively separate elongated bubbles from the liquid phase, and an extreme value extraction method is developed to calculate the number of dispersed bubbles in front of the nose of elongated bubbles. Moreover, the velocity offsets of elongated bubbles with and without dispersed bubbles are calculated separately based on contour extraction. In addition, the effects of dispersed bubbles on the fluctuating offsets of the nose tip position and velocity of elongated bubbles are statistically investigated under different flow velocities. The experimental results show that the increase of the gas-liquid flow velocity exacerbates the radial deviation of the nose tip and the fluctuation of axial velocity. 展开更多
关键词 fuzzy c mean algorithm elongated bubbles laser induced fluorescence segmentation method dispersed elongated bubbles horizontal slug flow dispersed bubbles extreme value extraction method
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