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In-situ post-doping plasma process during atomic layer deposition of Al-doped TiO2 for sub-nanometer lattice ordering and defect annihilation 认领 引用
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作者 Gyuha Lee Youngmin Sunwoo +5 位作者 Hyong June Kim Geongu Han Jeongmin Oh Sangwon Lee Byungjo Kim Jihwan An 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2026年第1期654-668,共15页
Atomic layer deposition(ALD)is extensively used to fabricate doped dielectrics due to its ability to deposit conformal films with atomic-scale thickness control.Al-doped TiO2(ATO)is a promising high-k dielectric fo... Atomic layer deposition(ALD)is extensively used to fabricate doped dielectrics due to its ability to deposit conformal films with atomic-scale thickness control.Al-doped TiO2(ATO)is a promising high-k dielectric for dynamic random access memory(DRAM)applications,offering a high dielectric constant with a remarkable leakage-lowering effect by Al acceptor doping.However,ATO fabrication via conventional supercycle-based ALD suffers from severe crystallinity loss during the growth of TiO2 upon Al doping owing to the dopant-induced lattice disorder.In addition,Al doping cannot reduce any inherent O vacancies(VO)of TiO2,although the original purpose of doping was to address the n-type nature caused by VO.To resolve these limitations,we propose a single-step,in-situ Ar/O2 post-doping plasma(PDP)process immediately after the Al dopant incorporation.Using the PDP process,simultaneous atomic-scale dopant migration-mediated crystallization and VO annihilation were successfully initiated.Thus,the surface concentration of the dopant decreased,reducing the dopant-induced lattice distortion,while promoting the highly crystallized seed layer-like surface.Consequently,strong rutile-phase recovery was accompanied by enhanced lattice-matched growth.In addition,the PDP process significantly lowers the VO-to-lattice oxygen ratio by facilitating the recombination between reactive O species and VO,increasing the corresponding 0.4 e V of conduction band offset(CBO).Despite the common trade-off between the dielectric constant and leakage,the Pt/PDP-ATO/Ru capacitor exhibited a simultaneous 30%increase in dielectric constant and up to a 1.6-order reduction in leakage current density. 展开更多
关键词 atomic layer deposition(ALD) Al-doped TiO2(ATO) post-doping plasma(PDP)process dielectric constant crystallization
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Adsorption mechanism of phosphate and arsenate in water by Al-doped Zr-based MOF and theoretical DFT study 认领 引用
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作者 Qiaoshu Zhou Yewei Qiu +5 位作者 Wenjing Chen Fan Lei Hao Xiang Fan Zheng Zhiguo Lin Xiangjun Yang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第2期143-154,共12页
Excessive phosphorus and arsenic in water bodies not only destroy ecosystems but also pose a serious threat to human health.In this study,a series of Al-doped modified metal-organic frameworks(Zr-Al-MOF)were prepared ... Excessive phosphorus and arsenic in water bodies not only destroy ecosystems but also pose a serious threat to human health.In this study,a series of Al-doped modified metal-organic frameworks(Zr-Al-MOF)were prepared by solvothermal method,which achieved efficient removal of phosphate and arsenate in water.Due to the use of inexpensive Al salts,the material has a lower cost and is more economical.The molar ratio of metal salts,adsorption time,solution pH,initial concentration,temperature and coexisting anions were studied,and it was found that when the molar ratio of Zr:Al was 2,Zr-Al-MOF had the best adsorption performance for phosphate and arsenate,and the maximum adsorption capacity was 93.04 mg P/g and 173.83 mg As/g,respectively.It traps phosphate and arsenate at a fast reaction rate and can be recycled repeatedly.In addition,0.15 g/L of 2Zr-Al-MOF can effectively reduce the phosphate and arsenate content in the contaminated spring water samples of Yangzonghai Lake to the standard range of drinking water,which further confirms the application potential of 2Zr-Al-MOF.By FT-IR and XPS analysis,it was found that the adsorption mechanism was ligand exchange,electrostatic attraction and hydrogen bond formation.The theoretical calculation shows that the adsorption energy is negative,which indicates that 2Zr-Al-MOF is attractive to phosphate and arsenate,and the adsorption state is stable.The results show that 2Zr-Al-MOF is an effective phosphate and arsenate adsorbent and has broad application prospects in eutrophication water treatment. 展开更多
关键词 Al-doped UiO-66-NH2 Adsorption Phosphate removal Arsenic DFT calculations
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Distribution of relaxation times assisted grain and grain boundary structural diagnosis of La2Zr2O7-modified Al-doped Li7La3Zr2O12 solid electrolyte 认领 引用
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作者 Yong-Jian Zhou Ya-Qing Zhou +3 位作者 Xiao-Yi Li Hao Zhou Xiao Huang Bingbing Tian 《Rare Metals》 SCIE EI CAS CSCD 2025年第5期3037-3050,共14页
The garnet-type Li7La3Zr2O12(LLZO)solid electrolyte is regarded as a promising option for all-solid-state batteries owing to its notable features,including high ionic conductivity and wide electrochemical ... The garnet-type Li7La3Zr2O12(LLZO)solid electrolyte is regarded as a promising option for all-solid-state batteries owing to its notable features,including high ionic conductivity and wide electrochemical window.Although aluminum-doped LLZO(Al-LLZO)is crucial for achieving LLZO ceramics with high critical current density,the characteristics of its grain and grain boundary structures remain largely elusive.In this work,the electrochemical impedance spectroscopy(EIS)technique,in conjunction with the distribution of relaxation times(DRT)method,was employed to investigate structural alterations in Al-LLZO ceramics modified by La2Zr2O7(LZO)additives.Additionally,the impact of sintering temperature and electrolyte testing temperature on ceramic structural changes was investigated using the DRT tools.By optimizing experimental conditions such as the concentration of added LZO and the sintering temperature of Al-LLZO,the study was further refined.This enabled us to successfully identify Al-LLZO solid electrolytes exhibiting uniform morphological structures,moderate crystal grain sizes and high density.By adding 6 wt%of LZO to the Al-LLZO solid electrolyte,we achieved the purest cubic phase and optimal lithium-ion conductivity.Under this condition,the sintered Al-LLZO ceramics exhibited exceeding 4.2×10-4S·cm-1conductivity at room temperature and a high critical current density of up to 0.6 mA·cm-2. 展开更多
关键词 Al-doped LLZO Grain boundary modification DRT tools La2Zr2O7 Solid electrolytes
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Metal-doped Mo2C(metal=Fe,Co,Ni,Cu)as catalysts on TiO2 for photocatalytic hydrogen evolution in neutral solution 认领 引用 被引量：12
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作者 Jing Liu Gary Hodes +1 位作者 Junqing Yan ShengzhongLiu 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第1期205-216,共12页
The neutral hydrogen evolution reaction(HER)is vital in the chemical industry,and its efficiency depends on the interior character of the catalyst.Herein,work function(WF)engineering is introduced via 3d metal(Fe,Co,N... The neutral hydrogen evolution reaction(HER)is vital in the chemical industry,and its efficiency depends on the interior character of the catalyst.Herein,work function(WF)engineering is introduced via 3d metal(Fe,Co,Ni,and Cu)doping for modulating the Fermi energy level of Mo2C.The defective energy level facilitates the free water molecule adsorption and,subsequently,promotes the neutral HER efficiency.Specifically,at a current density of 10 mA/cm2,Cu-Mo2C exhibits the best HER performance with an overpotential of 78 mV,followed by Ni-Mo2C,Co-Mo2C,Fe-Mo2C,and bare Mo2C with 90,95,100,and 173 mV,respectively,and the corresponding Tafel slope values are 40,43,42,56,and 102 mV/dec.The modified WF can also lead to an enhanced photocatalytic efficiency owing to the lowered Schottky barrier and excellent carrier transition across the electrocatalyst–solution interface.When coupling the metal-doped Mo2C samples with TiO2,enhanced photocatalytic neutral HER rates are obtained in comparison to the case with bare TiO2.Typically,the HER rates are 521,404,275,224,147,and 112μmol/h for Cu,Ni,Co,Fe,bare Mo2C,and bare TiO2,respectively.Time-resolved photoluminescence spectroscopy(TRPS)and ultrafast transient absorption(TA)measurements are carried out to confirm the recombination and migration of the photogenerated carriers.The fittedτvalues from the TRPS curves are 22.6,20.5,10.1,4.7,4.0,2.5,and 1.9 ns for TiO2,TiO2-Mo2C,TiO2-Fe-Mo2C,TiO2-Fe-Mo2C,TiO2-Fe-Mo2C,TiO2-Fe-Mo2C,and TiO2-Pt,respectively.Additionally,the fittedτvalues from the TA results are 31,73,and 105 ps for the TiO2-Mo2C,TiO2-Cu-Mo2C,and TiO2-Pt samples,respectively.This work provides in-depth insights into the WF modulation of an electrocatalyst for improving the HER performance. 展开更多
关键词 3d metal Doping Mo2C TiO2 Photocatalysis Water splitting Hydrogen evolution
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Non-UV based germicidal activity of metal-doped TiO_2 coating on solid surfaces 认领 引用 被引量：3
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作者 LIU Li-fen John Barford +1 位作者 YEUNG King Lun SI Grace 《Journal of Environmental Sciences》 SCIE EI CAS 2007年第6期745-750,共6页
A stain-based screening method was developed to screen different catalyst coatings for their germicidal activity. A Baclight dead/live bacteria viability kit （invitrogen, molecular probes） was used for staining the ... A stain-based screening method was developed to screen different catalyst coatings for their germicidal activity. A Baclight dead/live bacteria viability kit （invitrogen, molecular probes） was used for staining the cell. The screening was carried out following a standard procedure. This included loading cell suspension to solid surface and maintaining contact for 30 min, then staining with a mixture containing dyes. The stained cells were observed using an epifluorescent microscope and photographed with a CCD camera under UV. Metal-doped TiO2 coatings on AI plates were prepared and tested for non-UV germicidal activity without using UV. It was tested using model microorganisms such as Bakers Yeast （Saccharomyces cerevisiae）, Bacillus subtilis, Pseudomonas putida, and Escherichia coli. On the basis of the germicidal activity of catalyst and the degree of damage caused to the cells, the stained cells may appear green （viable）, green with red or yellow nuclei and yellow （compromised） or red （nonviable）. According to their stained color, cells were counted to calculate the percentage of dead, live, and compromised cells. Compromised cells are cells that grow very slowly after reculturing indicating a degree of reversible cell damage. Screening the germicidal activity using this staining method is accurate and efficient, and requires less time than the culture-based method. A modification to the procedure for measuring germicidal activity of rough surfaces or fibrous coatings was developed. Both TiO2 and metal-doped TiO2 （Ag, Pt, Au, Cu） possess non-UV based germicidal activity. The germicidal activity of TiO2 was found to be related with its wetting property and can be improved by UV irradiation before testing. It is not greatly affected by contact time, indicating a fast acting germicidal activity. 展开更多
关键词 staining germicidal activity TiO2 coating
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Crystallization behaviors of ultrathin Al-doped HfO2 amorphous films grown by atomic layer deposition 认领 引用 被引量：3
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作者 Xue-Li Ma Hong Yang +6 位作者 Jin-Juan Xiang Xiao-Lei Wang Wen-Wu Wang Jian-Qi Zhang Hua-Xiang Yin, Hui-Long Zhu Chao Zhao 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第2期461-466,共6页
In this work, ultrathin pure HfO_2 and Al-doped HfO_2films（about 4-nm thick） are prepared by atomic layer deposition and the crystallinities of these films before and after annealing at temperatures ranging from 550... In this work, ultrathin pure HfO_2 and Al-doped HfO_2films（about 4-nm thick） are prepared by atomic layer deposition and the crystallinities of these films before and after annealing at temperatures ranging from 550℃ to 750℃ are analyzed by grazing incidence x-ray diffraction. The as-deposited pure HfO_2 and Al-doped HfO_2 films are both amorphous. After550-℃ annealing, a multiphase consisting of a few orthorhombic, monoclinic and tetragonal phases can be observed in the pure HfO_2 film while the Al-doped HfO_2 film remains amorphous. After annealing at 650℃ and above, a great number of HfO_2 tetragonal phases, a high-temperature phase with higher dielectric constant, can be stabilized in the Al-doped HfO_2 film. As a result, the dielectric constant is enhanced up to about 35. The physical mechanism of the phase transition behavior is discussed from the viewpoint of thermodynamics and kinetics. 展开更多
关键词 Al-doped HfO2 ultrathin film phase transition thermodynamics kinetics
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纳米TiO2对全水性环氧树脂防水涂料性能的影响 认领 引用
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作者 王志强 廖国胜 +3 位作者 廖宜顺 梅军鹏 刘帆 陈乐舟 《广州化学》 CAS 2026年第4期84-88,I0004,共5页
以水性环氧树脂为基础原料,通过加入不同添加量的金红石型纳米TiO2、水性环氧固化剂及消泡剂等助剂,制备一种改性全水性环氧树脂防水涂料。研究了纳米TiO2添加量对防水涂料初始粘度、固含量、干燥时间、抗冲击性、柔韧性、铅笔硬度等性... 以水性环氧树脂为基础原料,通过加入不同添加量的金红石型纳米TiO2、水性环氧固化剂及消泡剂等助剂,制备一种改性全水性环氧树脂防水涂料。研究了纳米TiO2添加量对防水涂料初始粘度、固含量、干燥时间、抗冲击性、柔韧性、铅笔硬度等性能的影响。并对全水性环氧树脂防水涂料涂层进行标准养护、浸水、浸碱、浸酸、冻融循环、热老化、紫外线试验,测试其拉伸粘结强度及耐候性。同时采用扫描电镜(SEM)观察了不同TiO2添加量下防水涂料的涂层表面微观形貌。结果表明,纳米TiO2的加入对涂料的综合性能均有不同程度的提高,当纳米TiO2添加量为树脂质量的3%时,综合性能达到最佳。 展开更多
关键词 纳米TiO2 全水性环氧树脂 防水涂料 吸水率 拉伸强度 耐候性
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Au负载量对TiO2/Au光阳极光吸收能力的影响研究 认领 引用
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作者 聂宗昊 闫伯涵 +1 位作者 祝孝栋 李秀玉 《应用物理》 2026年第5期456-464,共9页
为了研究Au负载量对TiO2/Au光阳极的光吸收能力的影响,本文采用水热法和柠檬酸钠还原法制备了TiO2/Au材料,通过刮涂法制备光阳极。利用紫外–可见吸收、X射线衍射(XRD)、透射电子显微镜(TEM)等手段对不同Au负载量的TiO2/Au材料和TiO2/A... 为了研究Au负载量对TiO2/Au光阳极的光吸收能力的影响,本文采用水热法和柠檬酸钠还原法制备了TiO2/Au材料,通过刮涂法制备光阳极。利用紫外–可见吸收、X射线衍射(XRD)、透射电子显微镜(TEM)等手段对不同Au负载量的TiO2/Au材料和TiO2/Au光阳极进行表征分析。结果表明,Au负载量在1.0 wt%时,TiO2/Au光阳极的光吸收能力最佳;低于1.0 wt%时,Au负载量提高,TiO2/Au光阳极的光吸收能力也随之提高;高于1.0 wt%时,Au负载量提高,TiO2/Au光阳极的光吸收能力随之降低。 展开更多
关键词 光阳极 TiO2 Au纳米颗粒 N719染料
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First-principle investigation on electronic structures and elastic properties of Al-doped MoSi_2 认领 引用
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作者 刘小良 任意 +1 位作者 徐慧 赵中伟 《Journal of Central South University》 SCIE EI CAS 2010年第5期888-894,共7页
The electronic structures and elastic properties of Al-doped MoSi2 were calculated using the plane wave pseudo-potential method based on the density functional theory,in which the generalized-gradient approximation(GG... The electronic structures and elastic properties of Al-doped MoSi2 were calculated using the plane wave pseudo-potential method based on the density functional theory,in which the generalized-gradient approximation(GGA) was used to describe the exchange-correlation potential.Starting from the elastic constants,bulk modulus,shear modulus,elastic modulus and Poisson ratio of Al-doped MoSi2 were obtained by using the Hill method.The results indicate that conductivity of Al-doped MoSi2 is improved to some extent in comparison with that of pure MoSi2 due to the orbit hybridization of Mo 4d,Al 3p and Si 3p electrons.In addition,calculations show that the elastic modulus and the brittleness of Al-doped MoSi2 are smaller than those of pure MoSi2,which implies that it is feasible to toughen MoSi2 by doping Al.The agreement of the conclusion with experiment shows that the present theory is reasonable. 展开更多
关键词 MoSi2 Al-doping electronic structures elastic properties first-principle
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NiO修饰梯度对金红石相TiO2基MEMS氢敏传感器性能的优化研究 认领 引用
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作者 刘锦涛 鲍钰文 李晓博 《材料科学》 2026年第1期129-136,共8页
针对金红石相TiO2氢敏传感器存在的响应不足及选择性差的问题,本研究通过构建p-n异质结,开发了一种高性能的氢敏材料。采用水热法制备了不同NiO修饰量(1%~8%)的TiO2复合粉末,借助XPS、SEM等表征手段分析其结构形貌,并结合MEMS微热板器... 针对金红石相TiO2氢敏传感器存在的响应不足及选择性差的问题,本研究通过构建p-n异质结,开发了一种高性能的氢敏材料。采用水热法制备了不同NiO修饰量(1%~8%)的TiO2复合粉末,借助XPS、SEM等表征手段分析其结构形貌,并结合MEMS微热板器件测试气敏性能。结果表明,2% NiO修饰样品在391˚C下对1000 ppm氢气的响应值为金红石相TiO2的1.5倍,且对乙醇、CO等干扰气体具有优异选择性。本研究为高性能氢敏传感器的开发提供了有效的材料优化策略。 展开更多
关键词 金红石TiO2 NiO修饰梯度 P-N异质结 氢气传感 MEMS传感器 气敏机理
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激光粒度仪测疏水型TiO2粒径的研究 认领 引用
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作者 相阳 田晨毅 +2 位作者 金园平 束阳 潘媛媛 《广州化工》 CAS 2026年第16期118-121,140,共4页
粒径分布是影响钛白粉应用性能最重要的指标之一,然而疏水型钛白粉因为它的表面经过有机处理,在水中分散困难,极易团聚,给激光粒度仪粒径测试带来巨大挑战。本研究选用不同的分散介质和分散剂,在浓度、超声分散及其他测试条件都相同的... 粒径分布是影响钛白粉应用性能最重要的指标之一,然而疏水型钛白粉因为它的表面经过有机处理,在水中分散困难,极易团聚,给激光粒度仪粒径测试带来巨大挑战。本研究选用不同的分散介质和分散剂,在浓度、超声分散及其他测试条件都相同的情况下,采用Bettersize3000激光粒度仪进行对比实验,以粒径分布图的峰型、粒径平均值(D50)、粒度分布,结合TEM透射电镜对测试结果进行评价。结果表明,以无水乙醇为分散介质,并加入适量的BYK-111分散剂,超声分散5 min,有效的破坏疏水型钛白粉的团聚体,获得分散良好、重复性高的粒径测试结果,可为企业开展品质管控及产品研发提供更好的技术支持。 展开更多
关键词 Bettersize3000激光粒度仪 TiO2粒度分布 分散剂 影响因素
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TiO2光催化技术处理印染废水的研究进展 认领 引用 被引量：10
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作者 任敬 宗刚 +1 位作者 谢涛 景张欣 《化工新型材料》 CAS CSCD 北大核心 2025年第3期83-87,共5页
综述了二氧化钛(TiO2)光催化技术处理印染废水的研究进展,重点介绍了TiO2材料的改性方法,主要包括掺杂改性、材料负载、光敏化及半导体材料复合改性,并讨论了不同改性方法对TiO2结构和性能的影响。在此基础上,对TiO2光催化... 综述了二氧化钛(TiO2)光催化技术处理印染废水的研究进展,重点介绍了TiO2材料的改性方法,主要包括掺杂改性、材料负载、光敏化及半导体材料复合改性,并讨论了不同改性方法对TiO2结构和性能的影响。在此基础上,对TiO2光催化技术处理印染废水的研究前景进行了展望。 展开更多
关键词 印染废水 TiO2改性 光催化
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Enhancing Alkaline Hydrogen Evolution Reaction on Ru- Decorated TiO2 Nanotube Layers: Synergistic Role of Ti3+, Ru Single Atoms, and Ru Nanoparticles 认领 引用 被引量：2
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作者 Sitaramanjaneya Mouli Thalluri Jhonatan Rodriguez-Pereira +7 位作者 Jan Michalicka Eva Kolíbalová Ludek Hromadko Stanislav Slang Miloslav Pouzar Hanna Sopha Raul Zazpe Jan M.Macak 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2025年第3期191-198,共8页
Synergistic interplays involving multiple active centers originating from TiO2 nanotube layers(TNT)and ruthenium(Ru)species comprising of both single atoms(SAs)and nanoparticles(NPs)augment the alkaline hydrogen evolu... Synergistic interplays involving multiple active centers originating from TiO2 nanotube layers(TNT)and ruthenium(Ru)species comprising of both single atoms(SAs)and nanoparticles(NPs)augment the alkaline hydrogen evolution reaction(HER)by enhancing Volmer kinetics from rapid water dissociation and improving Tafel kinetics from efficient H*desorption.Atomic layer deposition of Ru with 50 process cycles results in a mixture of Ru SAs and 2.8-0.4 nm NPs present on TNT layers,and it emerges with the highest HER activity among all the electrodes synthesized.A detailed study of the Ti and Ru species using different high-resolution techniques confirmed the presence of Ti3+states and the coexistence of Ru SAs and NPs.With insights from literature,the role of Ti3+,appropriate work functions of TNT layers and Ru,and the synergistic effect of Ru SAs and Ru NPs in improving the performance of alkaline HER were elaborated and justified.The aforementioned characteristics led to a remarkable performance by having 9mV onset potentials and 33 mV dec-1 of Tafel slopes and a higher turnover frequency of 1.72 H2 s-1 at 30 mV.Besides,a notable stability from 28 h staircase chronopotentiometric measurements for TNT@Ru surpasses TNT@Pt in comparison. 展开更多
关键词 alkaline hydrogen evolution reaction ruthenium nanoparticles ruthenium single atoms TiO2 nanotube layers water dissociation
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三维TiO2/石墨烯气凝胶的自组装制备及其电容性能 认领 引用 被引量：1
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作者 王艳坤 张建民 王一帆 《化工新型材料》 CAS CSCD 北大核心 2025年第12期96-102,115,共7页
将氧化石墨烯纳米片与Ti(OH)4纳米颗粒通过溶胶静电自组装,然后水热还原和真空冷冻干燥处理制备了三维分层结构的TiO2/还原氧化石墨烯气凝胶(TGAs)。通过X射线衍射、热重、傅里叶变换红外光谱、拉曼光谱、X射线光电子能谱、氮气吸附... 将氧化石墨烯纳米片与Ti(OH)4纳米颗粒通过溶胶静电自组装,然后水热还原和真空冷冻干燥处理制备了三维分层结构的TiO2/还原氧化石墨烯气凝胶(TGAs)。通过X射线衍射、热重、傅里叶变换红外光谱、拉曼光谱、X射线光电子能谱、氮气吸附脱附实验、场发射扫描电镜和透射电镜对其微观结构、组成和形貌进行了表征。采用循环伏安、恒流充放电、电化学阻抗谱和循环稳定性等电化学方法对其超级电容性能进行了评估。结构分析显示TGAs呈现典型的三维分级多孔结构及具有高比表面积(287.4m2/g)。在1mol/L Na2SO4电解液中,该材料在扫速为5mV/s时表现出高达268.3F/g的比电容。此外,该材料还表现出优异的循环稳定性,经3000次循环后比电容保持率仍保持在93%左右,表明其在高性能超级电容器电极材料方面具有良好的应用前景。 展开更多
关键词 TiO 2 石墨烯 气凝胶 静电自组装 超级电容器
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包覆TiO2保护层抑制磷化镍钴在水中腐蚀 认领 引用 被引量：1
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作者 杨博 吕功煊 马建泰 《无机化学学报》 SCIE CAS CSCD 北大核心 2025年第2期365-384,共20页
本工作研究了镍钴双金属磷化物(Ni-Co-P)在水溶液中的稳定性。结果显示,Ni-Co-P能与H2O反应,发生自腐蚀生成Ni2+、Co2+和PO43-离子,同时产生H2。Ni-Co-P与H2O的自腐蚀反应速率受到镍钴比例影响,Ni-Co-P中的Co含量升高,... 本工作研究了镍钴双金属磷化物(Ni-Co-P)在水溶液中的稳定性。结果显示,Ni-Co-P能与H2O反应,发生自腐蚀生成Ni2+、Co2+和PO43-离子,同时产生H2。Ni-Co-P与H2O的自腐蚀反应速率受到镍钴比例影响,Ni-Co-P中的Co含量升高,其在水中的腐蚀速率降低。详细研究了镍、钴投料比(nNiCo)为1∶2制备的Ni-Co-P在水中的腐蚀行为,其在水中的腐蚀速率与溶液pH值、氧气含量、光照、温度等因素有关。为了抑制Ni-Co-P(nNiCo=1/2)在水溶液中的腐蚀,在其表面包裹一层惰性TiO2保护层,这层TiO2保护层能有效减缓Ni-Co-P在水中的腐蚀,增强其稳定性。 展开更多
关键词 双金属磷化物 水溶液 稳定性 TiO2保护层
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Effect of Ethanol on Synthesis and Electrochemical Property of Mesoporous Al-doped Titanium Dioxide via Solid-state Reaction 认领 引用 被引量：1
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作者 LIU Shaoyou LU Jianping +1 位作者 FENG Qingge TANG Wcnhua 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2011年第4期674-681,共8页
Mesoporous aluminum-doped titanium dioxide(Al-TiO2) materials with high specific surface areas were prepared via a solid-state reaction route.The properties of these materials were characterized by X-ray diffraction(X... Mesoporous aluminum-doped titanium dioxide(Al-TiO2) materials with high specific surface areas were prepared via a solid-state reaction route.The properties of these materials were characterized by X-ray diffraction(XRD),high resolution transmission electron microscopy(HRTEM),energy dispersive spectroscopy(EDS),N2 absorption-desorption,ultraviolet visible light spectroscopy(UV-Vis) and electrochemical spectroscopy.The results show that the mesoporous structure of the product with ethanol is composed of anatase laced crystal walls with amorphous grain boundaries formed gradually by degradation.Compared with those without ethanol,these samples possess larger crystallite size since ethanol decreases the pore size at higher temperature.With the increase of ethanol amount,however,the crystallite size will grow.The amorphous grain boundaries in the mesoporous material,with a large impedance and low incidental cyclic potential,are difficult to effectively degrade and the phase transformation temperature is changed from 500 to 550℃.The growth rate of Al-TiO2 crystallites that obeys the quadratic polynomial equation may be controlled. 展开更多
关键词 mesoporous material Al-doped TiO 2 solid-state reaction ethanol electrochemical property
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液相法制备TiO2薄膜光阳极及其光电化学阴极保护性能 认领 引用
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作者 姚权桐 胡素影 +3 位作者 王志有 程俊霞 王翠苹 冯云会 《辽宁科技大学学报》 CAS 2025年第3期177-184,203,共8页
为了研究不同相态TiO2薄膜的光电化学阴极保护性能,本文通过在不同温度下焙烧TiO2前驱体液态薄膜,获得锐钛矿和金红石两种相态TiO2薄膜,并系统对比两种相态薄膜的光电化学阴极保护性能。实验结果表明,锐钛矿相TiO2薄膜在紫... 为了研究不同相态TiO2薄膜的光电化学阴极保护性能,本文通过在不同温度下焙烧TiO2前驱体液态薄膜,获得锐钛矿和金红石两种相态TiO2薄膜,并系统对比两种相态薄膜的光电化学阴极保护性能。实验结果表明,锐钛矿相TiO2薄膜在紫外光谱区和可见光谱区的吸收能力均优于金红石相TiO2薄膜,且具有更低的载流子复合率。在白光辐照下,锐钛矿相TiO2薄膜可使304不锈钢开路电位负移至-0.95 V,金红石相TiO2薄膜可使开路电位负移至-0.75 V,为锐钛矿相TiO2薄膜的76%。锐钛矿相TiO2薄膜产生的光电流密度约为0.13 mA/cm2,金红石相TiO2薄膜产生的光电流密度约为0.10 mA/cm2,为锐钛矿相TiO2薄膜的76.9%。 展开更多
关键词 TiO2光阳极 液相法 锐钛矿相 金红石相 光电化学阴极保护
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Ca2+掺杂对Na0.5Bi0.5TiO3氧离子导体性能的影响 认领 引用
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作者 王伟国 薛瑜璐 《延安大学学报（自然科学版）》 2025年第2期98-102,共5页
提高固体电解质材料的离子电导率,对于降低固体氧化物燃料电池的运行温度、延长其使用寿命等方面具有重要的意义。采用固相反应法制备了钙钛矿结构的Ca2+掺杂的Na0.5CaxBi0.5-xTiO3氧离子导体,系统研究了Ca2+掺杂对Na... 提高固体电解质材料的离子电导率,对于降低固体氧化物燃料电池的运行温度、延长其使用寿命等方面具有重要的意义。采用固相反应法制备了钙钛矿结构的Ca2+掺杂的Na0.5CaxBi0.5-xTiO3氧离子导体,系统研究了Ca2+掺杂对Na0.5Bi0.5TiO3材料电学性能与氧离子输运的影响。结果表明,Na0.5CaxBi0.5-xTiO3材料的晶粒电导率随Ca2+掺杂含量提高呈现出先增加后减小的规律。当Ca2+掺杂含量为6 mol%时,Na0.5CaxBi0.5-xTiO3材料的晶粒电导率达到了最大值,其晶粒电导率在573 K时可达2.22×10-4 S/cm,高于母相Na0.5Bi0.5TiO3材料将近一个数量级。当Ca2+掺杂含量低于6 mol%时,随Ca2+掺杂含量的增加,氧空位浓度增大且能动性增强,导致了导体Na0.5CaxBi0.5-xTiO3(x=0,0.02,0.04,0.06)电导率的提升。当Ca2+掺杂含量高于6 mol%时,形成的缺陷对会造成Na0.5Bi0.5TiO3材料中氧空位有效浓度和能动性的下降,进而导致了材料晶粒电导率的下降。该研究可为Na0.5Bi0.5TiO3材料电化学性能优化提供理论参考。 展开更多
关键词 氧离子导体 钙钛矿 Ca2+掺杂 Na0.5Bi0.5TiO 弛豫
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纳米TiO2加入量对镁钙砂性能的影响 认领 引用 被引量：2
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作者 臧伟楠 栾舰 +2 位作者 王春艳 李佳 韩昊鹏 《耐火材料》 CAS 北大核心 2025年第1期45-49,共5页
为了改善镁钙材料的抗水化性能并进一步提高其他性能,以白云石粉和轻烧镁粉为主要原料,外加纳米TiO2,以酚醛树脂为结合剂,在100 MPa下成型,经1 650℃煅烧3 h制成镁钙砂试样,研究了TiO2外加量(外加质量分数分别为0、2%、4%、6%和8%... 为了改善镁钙材料的抗水化性能并进一步提高其他性能,以白云石粉和轻烧镁粉为主要原料,外加纳米TiO2,以酚醛树脂为结合剂,在100 MPa下成型,经1 650℃煅烧3 h制成镁钙砂试样,研究了TiO2外加量(外加质量分数分别为0、2%、4%、6%和8%)对其性能的影响。结果表明:纳米TiO2的引入可使材料内产生固溶体,促进晶粒长大,同时材料内会有新相CaTiO3和Ca4Ti3O10生成,提高颗粒间结合程度,但过量的新相生成会阻碍材料内气体排出,影响烧结过程。随着纳米TiO2外加量的增加,试样中CaTiO3和Ca4Ti3O10的含量增加,体积密度逐渐降低,显气孔率逐渐增大,常温抗折强度、常温耐压强度和抗水化性能以及热震后的常温抗折强度先增大后减小。当纳米TiO2外加量为2%(w)时,试样的强度、抗热震性和抗水化性能最高。 展开更多
关键词 镁钙材料 纳米TiO2 力学性能 抗水化性
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2D TiO2/ZnO的合成及光催化活性 认领 引用 被引量：1
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作者 范艳玲 任咏琪 徐玉林 《湖北理工学院学报》 2025年第1期65-71,共7页
光催化技术具有降解速率高、无毒、成本低等特点,在抗生素废水处理方面具有良好的应用前景。文章采用水热法合成2D TiO2/ZnO复合氧化物光催化剂,通过降解盐酸四环素(TCH)评价了其光催化活性,并探究了TiO2负载量、煅烧温度、煅烧... 光催化技术具有降解速率高、无毒、成本低等特点,在抗生素废水处理方面具有良好的应用前景。文章采用水热法合成2D TiO2/ZnO复合氧化物光催化剂,通过降解盐酸四环素(TCH)评价了其光催化活性,并探究了TiO2负载量、煅烧温度、煅烧时间和盐酸四环素用量对光催化活性的影响。结果表明:与2D TiO2和2D ZnO相比,2D TiO2/ZnO-50具有更好的催化活性,在煅烧温度为300℃,煅烧时间为2 h的条件下,在可见光下对5 mg/L TCH的降解率可达93.0%,对20 mg/L的盐酸四环素的降解率为82.2%。在2D TiO2/ZnO-50浓度为200 mg/L,盐酸四环素浓度为20 mg/L时,2D TiO2/ZnO-50光催化降解盐酸四环素属于准一级动力学反应,速率常数为0.00909 min-1,半衰期为76.2 min。 展开更多
关键词 2D TiO 2/ZnO 可见光催化 水热法 盐酸四环素
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