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Enhancing photocatalytic CO2reduction with Z-scheme heterojunction Ag/Bi2MoO6/BiOBr composite films:Synthesis and mechanistic insights 认领 引用 被引量：1
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作者 LI Jiao ZHAO Jing +3 位作者 WANG Yiming ZHAO Wenhai CHAI Yizhuo ZHANG Xiaochao 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2026年第4期140-150,共11页
This study presents the successful synthesis of a novel Z-scheme heterojunction composite film consisting of Ag/Bi2MoO6/BiOBr through electrochemical processes and ionexchange techniques,followed by the photodep... This study presents the successful synthesis of a novel Z-scheme heterojunction composite film consisting of Ag/Bi2MoO6/BiOBr through electrochemical processes and ionexchange techniques,followed by the photodeposition of noble metal silver(Ag)onto the composite structure.The catalytic efficiency of semiconductor photocatalysts is greatly improved by utilizing the localized surface plasmon resonance(LSPR)effect observed in Ag nanoparticles(NPs).Furthermore,the noble metal Ag serves as an intermediary bridge facilitating charge transfer between Bi2MoO6and BiOBr,while the formation of a Schottky barrier effectively inhibits the recombination of photo-generated electron-hole pairs.As a result,the Ag-deposited Bi2MoO6/BiOBr film exhibits superior photocatalytic performance in the reduction of CO2compared to its unmodified counterpart.Our experimental results indicate a non-linear relationship between Ag deposition and the efficiency of photocatalytic CO2reduction to CO,characterized by an initial increase in efficiency followed by a decline.The optimized 1.5%-Ag/Bi2MoO6/BiOBr film demonstrates exceptional photocatalytic activity,attaining a CO production rate of 13.65μmol/(g·h).This research explores the fundamental mechanisms that lead to improved photocatalytic CO2reduction capabilities of the Ag/Bi2MoO6/BiOBr film.Our research offers important perspectives for the thoughtful design and production of highly efficient photocatalysts,which are essential for advancing sustainable energy solutions. 展开更多
关键词 photocatalytic CO2reduction Ag NPs Bi2MoO6/BiOBr composite film Z-scheme heterojunction in situ synthesis
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Scalable Synthesis of Ultrathin Silica Nanosheets for Applications in Thermal-Management Aerogels and Flexible Composite Films 认领 引用
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作者 Qun-Yao Yuan Yuan-Fan Gu +1 位作者 Rong-Rong Cheacharoen Jie Zhao 《Rare Metals》 SCIE EI CAS CSCD 2026年第1期569-579,共11页
Silica nanosheets(SiO2 NSs) hold great promise for advanced thermal protection applications because of their exceptional thermal and chemical stability.However,their development has been hindered by challenges in s... Silica nanosheets(SiO2 NSs) hold great promise for advanced thermal protection applications because of their exceptional thermal and chemical stability.However,their development has been hindered by challenges in scalable synthesis and structural integration for specialized applications.Herein,we report a facile and scalable wet-chemical strategy for producing high-quality and ultrathin SiO2 NSs with lateral dimension more than 5 μm and thickness of ~2 nm.After graphene oxide(GO)-templated thermal treatment,the mechanical stiffness of the SiO2 NSs was significantly enhanced from 60.9 to 76.1 GPa.Leveraging their unique ultrathin and large lateral properties,the ultralight SiO2 NSs aerogel was achieved via a bidirectional freeze-casting technique.The aerogel demonstrates excellent fire resistance and high-temperature tolerance,maintaining its structure upon direct exposure to 1200℃ flames.Furthermore,the integration of SiO2 NSs into a polycaprolactone(PCL) matrix has enabled the development of a large-area and flexible fire-retardant composite film,which exhibits an exceptional flame selfextinguishing time of 2 s and mechanical flexibility.This work offers a scalable platform for fabricating functional SiO2 NSsbased materials and paves the way for their potential application in energy devices,aerospace protection,and flexible electronics. 展开更多
关键词 SiO2aerogels SiO2composite films SiO2nanosheets thermal management
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Flexible, magnetic and sandwich-structural Fe2O3/CNT/Fe2O3 composite film with absorption-dominant EMI shielding performance 认领 引用 被引量：4
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作者 Mengmeng Wang Li Tian +4 位作者 Xiao You Junmin Zhang Qinggang Li Jinshan Yang Shaoming Dong 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第24期122-132,共11页
To mitigate secondary electromagnetic pollution,there is an urgent need to develop absorption-dominant electromagnetic interference(EMI)shielding materials with low density,reduced thickness,lightweight construction,f... To mitigate secondary electromagnetic pollution,there is an urgent need to develop absorption-dominant electromagnetic interference(EMI)shielding materials with low density,reduced thickness,lightweight construction,flexibility,exceptional mechanical strength,and superior electrothermal and photothermal properties,particularly for flexible and wearable electronics.In this regard,we designed an absorption-based composite film comprising carbon nanotubes(CNT)and α-Fe2O3,featuring a CNT layer sandwiched between twoα-Fe2O3layers on the upper and lower surfaces.This composite film was fabricated through an electrodeposition process followed by a thermal annealing procedure to achieve enhanced EMI shielding performance along with improved electrothermal and photothermal properties.The strategically designed sandwich structure allows the rough surface of the upper α-Fe2O3layer to not only improve the impedance mismatch between free space and the composite film,facilitating the penetration of incident electromagnetic(EM)waves into the film and promoting increased EM absorption rather than reflection,but also to enhance electrical conductivity,thereby improving electron mobility and density.Consequently,the average total shielding effectiveness(SE)of the CNT/Fe16-300 composite demonstrates remarkable EMI shielding effectiveness(EMI SE:56.8 dB).Furthermore,the alteration in the absorption-to-reflection ratio(A/R)signifies a transition in the EMI shielding mechanism from reflection(0.69 for the pristine CNT film)to absorption(1.86 for the CNT/Fe16-300)with the incremental deposition of α-Fe2O3nanoparticles.This work presents a feasible manufacturing approach for developing composite films with a sandwich structure that exhibits absorption-dominant EMI shielding capabilities,contributing to advancements in thermal management and multifunctional electromagnetic shielding applications. 展开更多
关键词 Absorption-dominant electromagnetic interference CNT/Fe16-300 composite film Sandwich structure α-Fe2O3layer
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The effects of radiation damage on power VDMOS devices with composite SiO_2-Si_3N_4 films 认领 引用 被引量：3
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作者 高博 刘刚 +5 位作者 王立新 韩郑生 宋李梅 张彦飞 腾瑞 吴海舟 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第3期393-398,共6页
Total dose effects and single event effects on radiation-hardened power vertical double-diffusion metal oxide semiconductor（VDMOS） devices with composite SiO2-Si3N4 film gates are investigated.The relationships amon... Total dose effects and single event effects on radiation-hardened power vertical double-diffusion metal oxide semiconductor（VDMOS） devices with composite SiO2-Si3N4 film gates are investigated.The relationships among the important electrical parameters of the samples with different thickness SiO2-Si3N4 films,such as threshold voltage,breakdown voltage,and on-state resistance in accumulated dose,are discussed.The total dose experiment results show that the breakdown voltage and the on-state resistance barely change with the accumulated dose.However,the relationships between the threshold voltages of the samples and the accumulated dose are more complex,and not only positively drift,but also negatively drift.At the end of the total dose experiment,we select the group of samples which have the smaller threshold voltage shift to carry out the single event effect studies.We find that the samples with appropriate thickness ratio SiO2-Si3N4 films have a good radiation-hardening ability.This method may be useful in solving both the SEGR and the total dose problems with the composite SiO2-Si3N4 films. 展开更多
关键词 power VDMOS device total dose effects single event effects composite SiO2-Si3N4 films
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Effect of catalyst on structure of(PEO)_8LiClO_4-SiO_2 composite polymer electrolyte films 认领 引用 被引量：3
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作者 潘春跃 张倩 +2 位作者 冯庆 高金环 赵悠曼 《Journal of Central South University of Technology》 2008年第4期438-442,共5页
(PEO)8LiClO4-SiO2 composite polymer electrolytes(CPEs)were prepared by in-situ reaction,in which ethyl-orthosilicate(TEOS)was catalyzed by HCl and NH3.H2O,respectively.The ionic conductivity,the contact angle and the ... (PEO)8LiClO4-SiO2 composite polymer electrolytes(CPEs)were prepared by in-situ reaction,in which ethyl-orthosilicate(TEOS)was catalyzed by HCl and NH3.H2O,respectively.The ionic conductivity,the contact angle and the morphology of inorganic particles in the CPEs were investigated by AC impedance spectra,contact angle method and TEM.The conductivities of acid-catalyzed CPE and alkali-catalyzed CPE are 2.2×10-5and 1.1×10-5S/cm respectively at 30℃.The results imply that the catalyst plays an important role in the structure of in-situ preparation of SiO2,and influences the surface energy and conductivity of CPE films directly.Meanwhile,the ionic conductivity is related to the surface energy. 展开更多
关键词 PEO（polyethylene oxide） SiO2 composite polymer electrolyte conductivity catalytic reaction
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DEFORMATION INVESTIGATION ON iPP/SiO_2 COMPOSITES: INFLUENCE OF STRETCHING TEMPERATURE AND PARTICLE SIZE ON MORPHOLOGY EVOLUTION AND CRYSTALLINE STRUCTURE OF THIN FILMS 认领 引用
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作者 Xiu-qin Zhang Qian Xing +2 位作者 Rong-bo Li 王锐 Du-jin Wang 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2013年第2期275-284,共10页
In the present work, structure changes during （SiO2） composites have been investigated systematically stretching of isotactic polypropylene （iPP） and iPP/silicon dioxide The or-form crystal structure of both iPP a... In the present work, structure changes during （SiO2） composites have been investigated systematically stretching of isotactic polypropylene （iPP） and iPP/silicon dioxide The or-form crystal structure of both iPP and iPP/SiO2 composites is destroyed and transforms into the mesophase as the samples are stretched at a low temperature （35℃）, while stretching at high temperatures （90℃ and 120℃） can restrain the appearance of defects and keep the perfection of crystal structure. FTIR results reveal that the stretching temperatures show no obvious difference of the effect on the orientation of pure iPP, however, the orientation of iPP/SiO2 composites is greatly changed by the tensile temperature. In the case of micron-sized SiO2 particles （average particle diameter d 〉 1 μm）, the orientation of the composites is lower than that of pure iPP at all stretching temperatures. The above results suggest that the stretching temperature and the SiO2 particle size have great influence on the structure variation and orientation behavior of iPP/SiO2 composites. 展开更多
关键词 iPP/SiO2 composites Stretching Morphology Structure variation.
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Enhanced nonlinear optical absorption of Au/SiO_2 nano-composite thin films 认领 引用
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作者 赵翠华 张波萍 尚鹏鹏 《Chinese Physics B》 SCIE EI CAS 2009年第12期5539-5543,共5页
Nano metal-particle dispersed glasses are the attractive candidates for nonlinear optical material applications. Au/SiO2 nano-composite thin films with 3 vol% to 65 vol% Au are prepared by inductively coupled plasma s... Nano metal-particle dispersed glasses are the attractive candidates for nonlinear optical material applications. Au/SiO2 nano-composite thin films with 3 vol% to 65 vol% Au are prepared by inductively coupled plasma sputtering. Au particles as perfect spheres with diameters between 10 nm and 30 nm are uniformly dispersed in the SiO2 matrix. Optical absorption peaks due to the surface plasmon resonance of Au particles are observed. The absorption property is enhanced with the increase of Au content, showing a maximum value in the films with 37 vol% Au. The absorption curves of the Au/SiO2 thin films with 3 vol% to 37 vol% Au accord well with the theoretical optical absorption spectra obtained from Mie resonance theory. Increasing Au content over 37 vol% results in the partial connection of Au particles, whereby the intensity of the absorption peak is weakened and ultimately replaced by the optical absorption of the bulk. The band gap decreases with Au content increasing from 3 vol% to 37 vol % but increases as Au content further increases. 展开更多
关键词 Au/SiO2 nano-composite film plasma sputtering optical absorption spectra
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Corrosion Resistance of Sintered NdFeB Permanent Magnet With Ni-P/TiO_2 Composite Film 认领 引用 被引量：20
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作者 SONG Lai-zhou YANG Zhi-yong 《Journal of Iron and Steel Research International》 SCIE CAS 2009年第3期89-94,共6页
The Ni-P/TiO2 composite film on sintered NdFeB permanent magnet was investigated by X-ray diffraction （XRD）,environmental scanning electron microscopy （ESEM）,and energy dispersive X-ray spectrometer （EDX）. The c... The Ni-P/TiO2 composite film on sintered NdFeB permanent magnet was investigated by X-ray diffraction （XRD）,environmental scanning electron microscopy （ESEM）,and energy dispersive X-ray spectrometer （EDX）. The corrosion resistance of Ni-P/TiO2 film coated on NdFeB magnet,in 0.5 mol/L NaCl solution,was studied by potentiodynamic polarization,salt spray test and electrochemical impedance spectroscopy （EIS） techniques. The self-corrosion current density （icorr） and the polarization resistance （Rp） of Ni-P/TiO2 film are 0.22 μA/cm2 （about 14% of that of Ni-P coating）,and 120 kΩ·cm2 （about 2 times of that of Ni-P coating）,respectively. The anti-salt spray time of Ni-P/TiO2 film is about 2.5 times of that of the Ni-P coating. The results indicate that Ni-P/TiO2 film has a better corrosion resistance than Ni-P coating,and the composite film increases the corrosion resistance of NdFeB magnet markedly. 展开更多
关键词 sintered NdFeB permanent magnet Ni-P/TiO2 composite film sodium chloride solution corrosion resistance
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PREPARATION AND CORROSION RESISTANCE OF NiP/TiO_2 COMPOSITE FILM ON CARBON STEEL IN SULFURIC ACID SOLUTION 认领 引用 被引量：5
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作者 L.Z. Song S.Z. Song J. Zhao 《Acta Metallurgica Sinica(English Letters)》 EI CAS 2006年第2期117-123,共7页
A NiP/TiO2 composite film on carbon steel was prepared by electroless plating and sol-gel composite process. An artificial neural network was applied to optimize the prepared condition of the composite film. Corrosion... A NiP/TiO2 composite film on carbon steel was prepared by electroless plating and sol-gel composite process. An artificial neural network was applied to optimize the prepared condition of the composite film. Corrosion behavior of the NiP/TiO2 composite film was investigated by polarization resistance measurement, anode polarization, ESEM （environmental scanning electron microscopy） and EIS （electrochemical impedance spectroscopy） measurements. Results showed that the NiP/ TiO2 composite film has a good corrosion resistance in 0.5mol/L H2SO4 solution. The element valence of the composite film was characterized by XPS （X-ray photoelectron spectroscopy） spectrum, and an anticorrosion mechanism of the composite film was discussed. 展开更多
关键词 electroless plating and sol-gel composite process artificial neural network NiP/TiO2 composite film corrosion resistance
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Enhanced optical nonlinear absorption of graded Au-TiO_2 composite films 认领 引用 被引量：3
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作者 刘莉 苏雄睿 《Chinese Physics B》 SCIE EI CAS 2008年第6期2170-2174,共5页
This paper reports that single-layer and graded Au-TiO2 granular composite films with Au atom content 15%- 66% were prepared by using reactive co-sputtering technique. The third-order optical nonlinearity of single-la... This paper reports that single-layer and graded Au-TiO2 granular composite films with Au atom content 15%- 66% were prepared by using reactive co-sputtering technique. The third-order optical nonlinearity of single-layer and graded composite films was investigated by using s- and p-polarized Z-scans in femtosecond time scale. The nonlinear absorption coefficient βeff of single-layer Au-TiO2 films is measured to be -2.3×10^3-0.76×10^3 cm/GW with Au atom content 15%-66%. The βeff value of the 10-layer Au-TiO2 graded film is enhanced to be -2.1×10^4cm/GW calculated from p-polarized Z-scans, which is about ten times the maximum βeff of single-layer films. Broadened response in the wavelength region 730-860 nm of the enhanced optical nonlinearity of graded Au-TiO2 composite films was also investigated. 展开更多
关键词 Au-TiO2 granular composites graded composite films Z-scan optical nonlinear absorption
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Constructing Bi2WO6-decorated TiO2 composite films for photocathodic protection of 304 stainless steel 认领 引用
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作者 Ming-liang Wang Yuan Lin +2 位作者 Yi-ping Lu Na Wei Ting-ju Li 《Journal of Iron and Steel Research International》 SCIE EI CAS CSCD 2021年第8期1054-1063,共10页
Bi2WO6 nanoplate/TiO2 nanowire and Bi2WO6 nanoflower/TiO2 nanowire composite films were successfully prepared using a hydrothermal method.The results show that the light absorption for Bi2WO6/T... Bi2WO6 nanoplate/TiO2 nanowire and Bi2WO6 nanoflower/TiO2 nanowire composite films were successfully prepared using a hydrothermal method.The results show that the light absorption for Bi2WO6/TiO2 composite films is extended to the visible region after Bi2WO6 nanoplates and nanoflowers are assembled onto TiO2 nanowires.Furthermore,Bi2WO6 nanoflower/TiO2 nano wire composite film exhibits a better absorption property compared to Bi2WO6 nanoplate/TiO2 nanowire film,which is mainly ascribed to the narrower bandgap of Bi2WO6 nanoflower compared to that of Bi2WO6 nanoplate.The photocurrent density for Bi2WO6 nanoflower/TiO2 nanowire and Bi2WO6 nanoplate/TiO2 nanowire composite films can reach 95 and 62.5 μA cm-2,respectively,which are much higher than that obtained for a pure TiO2 nanowire film(25 μA cm-2).Meanwhile,under illumination,the pure TiO2 nanowire,Bi2WO6 nanoplate/TiO2 nanowire and Bi2WO6 nanoflower/TiO2 nanowire films can reduce the potential of the coupled 304 stainless steel in 3.5 wt.%NaCl solution by 299,719 and 739 mV,respectively.Thus,Bi2WO6 nanoflower/TiO2 nanowire film is found to provide the best effective photocathodic protection for 304 stainless steel.This work not only provides an example of shape-dependent photocathodic protection based on Bi2WO6 but also opens up new possibilities to design an ideal microstructure on the basis of semiconductor materials for future applications of photocathodic protection. 展开更多
关键词 Photocathodic protection Composite film Bi2WO6 TiO2 Stainless steel
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Dopant compensation in component-dependent self-doped Cs2SnI6thin films grown with PLD at room temperature 认领 引用 被引量：1
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作者 Yansu Shan Qingyang Zhang +5 位作者 Haoming Wei Shiyu Mao Luping Zhu Xiaofan Liu Xia Wang Bingqiang Cao 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2025年第14期9-17,共9页
Tetravalent tin(Sn4+)-based inorganic perovskite semiconductors like Cs2SnI6are expected to replace lead-based perovskite counterparts due to advantages such as structural stability and environmental friendli... Tetravalent tin(Sn4+)-based inorganic perovskite semiconductors like Cs2SnI6are expected to replace lead-based perovskite counterparts due to advantages such as structural stability and environmental friendliness.In this paper,we reported the dopant compensation effect in the component-dependent self-doped(111)-oriented Cs2SnI6thin films grown with pulsed laser deposition(PLD)at room temperature.The films were grown on(100)-SrTiO3(STO)substrates at room temperature by PLD.Hall results of the Cs2SnI6films with different components realizing by controlling the ratio of SnI4/CsI in the targets demonstrate a clear change of conductivity type from N-type to P-type,while the carrier concentration decreases from 1018 to 1013 and accordingly the film resistivity increases significantly from 3.8 to 2506Ωcm.The defect-relatedopticalfingerprints of Cs2SnI6films werealsoinvestigated withtemperature-dependent photoluminescence spectroscopy.At low temperatures of 10 K,the Cs2SnI6films exhibit donor-bound(D0X)and donor-acceptor pair(DAP)emission,respectively,due to the self-doping effect.These re-sults indicate that controlling the composition of the PLD target is a powerful way to tune the electrical properties of Cs2SnI6films for possible applications in solar cells or X-ray detectors. 展开更多
关键词 Cs2SnI6thin films PLD Target composition Self-doping Dopant compensation
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Preparation,Characterization and Photothermal Study of PVA/Ti2O3 Composite Films 认领 引用
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作者 尚蒙娅 HE Yanyan +3 位作者 YU Jianhui YAN Jiahui XIE Haodi 李金玲 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS CSCD 2024年第3期658-663,共6页
In this work,flexible photothermal PVA/Ti2O3 composite films with different amount(0 wt%,5 wt%,10 wt%,15 wt%)of Ti2O3 particles modified by steric acid were prepared by a simple solution casting method.The... In this work,flexible photothermal PVA/Ti2O3 composite films with different amount(0 wt%,5 wt%,10 wt%,15 wt%)of Ti2O3 particles modified by steric acid were prepared by a simple solution casting method.The microstructures,XRD patterns,FTIR spectra,UV-Vis-NIR spectra thermo-conductivity,thermo-stability and photothermal effects of these composite films were all characterized.These results indicated that Ti2O3 particles were well dispersed throughout the polyvinyl alcohol(PVA)matrix in the PVA/Ti2O3 composite films.And Ti2O3 particles could also effectively improve the photothermal properties of the composite films which exhibited high light absorption and generated a high temperature(about 57.4℃for film with 15 wt%Ti2O3 amount)on the surface when it was irradiated by a simulated sunlight source(1 kW/m2). 展开更多
关键词 Ti2O3particles solution casting method composite film photothermal conversion
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Preparation of Al_2O_3-SiO_2-TiO_2-ZrO_2 Composite Ceramic Membranes by Sol-Gel Method 认领 引用
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作者 吴建锋 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2005年第1期42-45,共4页
Al 2O 3-SiO 2-TiO 2-ZrO 2 supported membranes were prepar ed by Sol-Gel method. These composite ceramic membranes are level, even and no macro crack. There exist several crystalline phases such as Al 2O 3, TiO 2(a nat... Al 2O 3-SiO 2-TiO 2-ZrO 2 supported membranes were prepar ed by Sol-Gel method. These composite ceramic membranes are level, even and no macro crack. There exist several crystalline phases such as Al 2O 3, TiO 2(a natase), Al 2SiO 5, and ZrO 2 in these membranes. Changing the molar ratio of Al∶Si∶Ti∶Zr,the kinds and content of crystal phases of composite membranes could be different, which may lead to a variety of microstructure of membranes. The surface nanoscale topography and microstructure of membranes were investiga ted by XRD,SEM,AFM,EPMA. The effects of additives and heat treatments on the sur face nanoscale topography and microstructure of composite ceramic membranes were also analyzed. 展开更多
关键词 sol-gel method Al 2O 3-SiO 2-TiO 2-ZrO 2 composite ceramic membranes surface nanoscale topography microstructure
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光固化PUA/SiO2复合树脂的制备与性能研究 认领 引用
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作者 蔡瑞杰 吴德敏 +3 位作者 蔡党润 孙踊壮 鲍泽农 张胜文 《涂料工业》 CAS 北大核心 2026年第6期24-29,43,共6页
【目的】改善光固化聚氨酯的强度与柔韧性。【方法】使用N,N-二甲基丙烯酰胺(DMAA)对纳米SiO2进行改性并与聚氨酯丙烯酸酯(PUA)复合,制备了PUA/SiO2复合树脂。重点研究了改性SiO2含量对PUA树脂及复合膜微观结构和性能的影响。... 【目的】改善光固化聚氨酯的强度与柔韧性。【方法】使用N,N-二甲基丙烯酰胺(DMAA)对纳米SiO2进行改性并与聚氨酯丙烯酸酯(PUA)复合,制备了PUA/SiO2复合树脂。重点研究了改性SiO2含量对PUA树脂及复合膜微观结构和性能的影响。【结果】改性SiO2均匀分散于PUA基体中,且对PUA树脂黏度影响较小。改性SiO2含量为5%时,复合膜力学性能显著提升,模量、拉伸强度、断裂伸长率分别达到0.55 GPa、20.72 MPa、132.49%(分别提升27.91%、67.78%、27.95%),同时保持较高透明性(透光率91.25%、雾度4.04%)。【结论】制备的光固化PUA/SiO2复合树脂在高强度、高柔韧性、高透明性涂层与膜材料领域应用前景广阔。 展开更多
关键词 聚氨酯丙烯酸酯 改性SiO2 复合膜 力学性能 光学性能
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High photocatalytic activity of Cu2O/TiO2/Pt composite films prepared by magnetron sputtering 认领 引用 被引量：4
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作者 Guang-Xiao Ren Bin Yu +3 位作者 Yi-Ming Liu Hong-Xia Wang Wang-Gang Zhang Wei Liang 《Rare Metals》 SCIE EI CAS CSCD 2017年第10期821-827,共7页
Cu2O/TiOa/Pt three-layer films were deposited on glass substrates using magnetron sputtering method. The surface morphology and the optical properties of the composite film were characterized by X-ray diffraction （XR... Cu2O/TiOa/Pt three-layer films were deposited on glass substrates using magnetron sputtering method. The surface morphology and the optical properties of the composite film were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, ultraviolet- visible spectroscopy （UV-Vis） and photoluminescence spectroscopy （PL）. The photocatalytic activity of the samples was evaluated by the photocatalytic degradation of methyl orange （MO） aqueous solution under visible light irradiation. The results indicate that the Cu2O/TiO2/Pt composite films are made up of three layers which are Pt layer, anatase-TiO2 layer and Cu2O layer from bottom to top. The surface of the films is even and composed of regular-shaped spherical particles. The photocatalytic activity of the Cu2O/TiO2/Pt three-layer film is much higher than that of the Cu2O/TiO2 double-layer film. Such enhancement is ascribed to the presence of Pt layer, which further inhibits the photogenerated electron-hole recombination, prolongs the lifetime of the photogenerated carriers, increases the quantum efficiency and hence improves the photocatalytic activity of the film effectively. 展开更多
关键词 Cu2O/TiO2/Pt Composite films Visible light Photocatalytic activity
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基于SiO2@PDA-DGT原位检测水体中生物有效态Cr(Ⅵ) 认领 引用
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作者 陈朴菁 施琪 +3 位作者 邹毅彬 田永强 吕东境 黄旭光 《生态与农村环境学报》 CAS CSCD 北大核心 2026年第2期292-300,共9页
为原位检测水体中生物有效态Cr(Ⅵ),开发聚多巴胺(polydopamine,PDA)包覆二氧化硅(SiO2)的复合材料(SiO2@PDA),将其引入结合相的梯度扩散薄膜(SiO2@PDA-DGT)装置,测试装置在不同水体中的适用条件并探索测定生物有效态Cr(Ⅵ)的... 为原位检测水体中生物有效态Cr(Ⅵ),开发聚多巴胺(polydopamine,PDA)包覆二氧化硅(SiO2)的复合材料(SiO2@PDA),将其引入结合相的梯度扩散薄膜(SiO2@PDA-DGT)装置,测试装置在不同水体中的适用条件并探索测定生物有效态Cr(Ⅵ)的可行性。结果表明,SiO2@PDA-DGT装置对Cr(Ⅵ)具有较强的选择性吸附和积累能力;在含有高浓度Cr(Ⅲ)的水样〔CCr(Ⅵ)∶CCr(Ⅲ)=1∶10〕中,能实现对Cr(Ⅵ)的精准选择性测定(R=CDGT/Csoln=1.03);在pH值为5.0~7.0、离子强度为0.1~800 mmol·L-1范围内,能够准确测定水体中生物有效态Cr(Ⅵ);设定条件下,对Cr(Ⅵ)的最大有效吸附容量为100 mg·L-1,空白值为2.43μg·L-1,方法检出限为0.49μg·L-1,Cr(Ⅵ)的扩散系数Dcell为6.70×10-6 cm2·s-1;综合比较已报道的同类装置,SiO2@PDA-DGT装置具有原位检测优势,且在不同环境中均表现出较高的稳定性,具备广泛的应用潜力。 展开更多
关键词 Cr(Ⅵ) SiO2@PDA复合材料 薄膜扩散梯度技术(DGT) 原位检测 生物有效态
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Preparation and luminescent properties of CaF_2:Ln3+(Ln:Er, Er/Yb)/Nafion composite films 认领 引用
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作者 Limei Song Jianhua Gao +3 位作者 Minmin Liang Xiaojun Li Jiangtao Li Liuchang Wang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2019年第3期232-236,共5页
In this work, CaF_2:Ln3+(Ln:Er,Er/Yb)/Nafion composite films were prepared using Nafion as modifications and matrices by dripping method. The composite films were characterized by Fourier transform infrared spectro... In this work, CaF_2:Ln3+(Ln:Er,Er/Yb)/Nafion composite films were prepared using Nafion as modifications and matrices by dripping method. The composite films were characterized by Fourier transform infrared spectroscopy(FT-IR), X-ray diffraction(XRD) and scanning electron microscopy(SEM). Composite films are transparent and CaF_2:Ln3+(Ln:Er,Er/Yb) nanoparticles are well dispersed in Nafion films.The thicknesses of CaF_2:Er3+/Nafion and CaF_2:Er3+,Yb3+/Nafion composite film are about 77 and 73 μm,respectively. The nanoparticles in composite film possess cubic phase. CaF_2:Er3+,Yb3+/Nafion composite film has stronger characteristic emission of Er3+ around 1530 nm with full width at half-maximum(FWHM) of 73 nm and longer luminescence lifetimes of 22.04 μs(25.03%) and 100.77 μs(74.97%). 展开更多
关键词 CaF2 nanoparticles Photoluminescence Erbium Nafion Composite film Rare earths
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TiO2-Loaded WO3 Composite Films for Enhancement of Photocurrent Density 认领 引用
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作者 Wen-Gui Wang Li Zhu +1 位作者 Yu-Yan Weng Wen Dong 《Chinese Physics Letters》 SCIE EI CAS CSCD 2017年第2期112-116,共5页
Titanium dioxide （TiO2） loaded tungsten trioxide （WO3） composite films are prepared by an E-beam vapor system. Associated with the existence of a heterojunction at the interface of TiO2 and WO3, the prepared TiO2-... Titanium dioxide （TiO2） loaded tungsten trioxide （WO3） composite films are prepared by an E-beam vapor system. Associated with the existence of a heterojunction at the interface of TiO2 and WO3, the prepared TiO2-WO3 composite film shows enhanced photocurrent density, four times than the pure WO3 film illuminated under xenon lamp, and higher incident-photon-to-current conversion e^ciency. By varying the initial TiO2 film thickness, such composite structures could be optimized to obtain the highest photocurrent density. We believe that thin TiO2 films improve the light response and increase the surface roughness of WO3 films. Furthermore, the existence of the heterojunction results in the e^cient charge carriers＇ separation, transfer process, and a lower recombination of electron-hole pairs, which is beneficial for the enhancement of photocurrent density. 展开更多
关键词 TiO2-Loaded WO3 Composite Films for Enhancement of Photocurrent Density FTO
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Antibacterial Activity of TiO2/Ti Composite Photocatalyst Films Treated by Ultrasonic Cleaning 认领 引用 被引量：3
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作者 Yun Lu Lian Hao +1 位作者 Yutaka Hirakawa Hiromasa Sato 《Advances in Materials Physics and Chemistry》 CAS 2012年第4期9-12,共4页
In this work, TiO2/Ti composite films were fabricated by 2-setp MCT and the following high temperature oxidation. Antibacterial activity of the composite films treated by ultrasonic cleaning to increase the performanc... In this work, TiO2/Ti composite films were fabricated by 2-setp MCT and the following high temperature oxidation. Antibacterial activity of the composite films treated by ultrasonic cleaning to increase the performance reliability was examined. The prepared TiO2/Ti composite films showed high photocatalytic activity in the degradation of methylene blue solution. It is obvious that? TiO2/Ti composite films have antibacterial activity under UV irradiation. 展开更多
关键词 Mechanical Coating Technique TiO2/Ti Composite Film Photocatatlyst Antibacterial Activity
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