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Enhancing photocatalytic CO2reduction with Z-scheme heterojunction Ag/Bi2MoO6/BiOBr composite films:Synthesis and mechanistic insights 认领 引用
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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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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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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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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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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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Stabilization of ferric arsenate sludge with mechanochemically prepared FeS2/Fe composites 认领 引用 被引量：3
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作者 Xiao-bo MIN Tian-yu PENG +3 位作者 Yang-wen-jun LI Yong KE Yan-jie LIANG Xing-yu HE 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第9期1983-1992,共10页
FeS2/Fe composites were mechanochemically prepared with iron powder and pyrite for the stabilization of ferrite arsenate sludge(FAS).The effects of preparation parameters on stabilization performance were investigated... FeS2/Fe composites were mechanochemically prepared with iron powder and pyrite for the stabilization of ferrite arsenate sludge(FAS).The effects of preparation parameters on stabilization performance were investigated.The results show that the optimum conditions are FeS2/Fe molar ratio of 5:5,milling time of 2 h,ball-to-material mass ratio of 15:1 and milling with stainless steel ball.Then,the composites were characterized by XRD,SEM,FTIR,etc.The physicochemical properties of FeS2/Fe mixture change dramatically,which is responsible for its excellent performance.Finally,the stabilization process of FAS was optimized.When the FAS is mixed with composites at mass ratio of 4:1 and milled for 30 min,the As leaching concentration of FAS can be reduced from 639.15 to 4.74 mg/L with the stabilization ratio of 99.2%. 展开更多
关键词 arsenic ferric arsenate sludge stabilization mechanical milling FeS2/Fe composites
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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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Effect of Zn and Ti mole ratio on microstructure and photocatalytic properties of magnetron sputtered TiO_2-ZnO heterogeneous composite film 认领 引用 被引量：2
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作者 白力静 寇钢 +1 位作者 龚振瑶 赵志明 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第12期3643-3649,共7页
Series of TiO 2-ZnO heterojunction composite films with different n（Zn）（Ti） ratios were prepared by UDP450 magnetron sputter ion plating equipment, and the mole ratio of Zn to Ti was controlled by adjusting the cu... Series of TiO 2-ZnO heterojunction composite films with different n（Zn）（Ti） ratios were prepared by UDP450 magnetron sputter ion plating equipment, and the mole ratio of Zn to Ti was controlled by adjusting the current values of sputtering target. The effects of n（Zn）（Ti） on the microstructures of TiO2-ZnO films were investigated by SEM, AFM, Raman and XPS, and their photocatalytic decomposition of methyl orange solutions was evaluated. The results show that an increase in n（Zn）（Ti） typically results in a decrease in the grain size of composite films firstly and then an increase of grain size, while an increase in n（Zn）（Ti） leads to an increase in film roughness firstly and then a decrease in film roughness. Both grain size and roughness of TiO2-ZnO films reach the maximum and minimum at n（Zn）（Ti） of 1/9.3, respectively. The n（Zn）（Ti） shows little effect on the valences of Zn and Ti elements, which mainly exist in the form of TiO2 and ZnO phases. The n（Zn）（Ti） has influence on the amount of anataseutile TiO2 heterojunction in the film. With increase of the n（Zn）（Ti）, the absorption intensity of the composite film increases and the absorption region extends to 450 nm, which is redshifted as much as 150 nm in comparison with the pure TiO2 films. However, the photocatalytic abilities of heterogeneous composite films do not depend on the n（Zn）（Ti） but rather on the microstructures of the TiO2-ZnO composite films. Degradation rate of the film reaches the maximum and the photocatalytic decomposition of pollutants works best when n（Zn）（Ti）=1：9.3. 展开更多
关键词 magnetron sputtering TiO2-ZnO thin films Zn to Ti mole ratio microstructure photocatalytic
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Substrate temperature dependence of chemical state and magnetoresistance characteristics of Co–TiO2 nanocomposite films 认领 引用 被引量：1
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作者 Hao-yu CHEN Yi-wen ZHANG +3 位作者 Zhong WU Zhen-bo QIN Shan-shan WU Wen-bin HU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2020年第9期2502-2509,共8页
Co−TiO2 nanocomposite films were prepared via magnetron sputtering at various substrate temperatures.The films comprise Co particles dispersed in an amorphous TiO2 matrix and exhibit coexisting ferromagnetic and super... Co−TiO2 nanocomposite films were prepared via magnetron sputtering at various substrate temperatures.The films comprise Co particles dispersed in an amorphous TiO2 matrix and exhibit coexisting ferromagnetic and superparamagnetic properties.When the substrate temperature increases from room temperature to 400℃,Co particles gradually grow,and the degree of Co oxidation significantly decreases.Consequently,the saturation magnetization increases from 0.13 to 0.43 T at the same Co content by increasing the substrate temperature from room temperature to 400℃.At a high substrate temperature,conductive pathways form among some of the clustered Co particles.Thus,resistivity rapidly declines from 1600 to 76μΩ·m.The magnetoresistive characteristic of Co−TiO2 films is achieved even at resistivity of as low as 76μΩ·m.These results reveal that the obtained nanocomposite films have low Co oxidation,high magnetization and magnetoresistance at room temperature. 展开更多
关键词 Co TiO2 nanocomposite films ferromagnetic property superparamagnetic property magnetoresistance
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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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Magnetic and Optical Properties of the TiO_2-Co-TiO_2 Composite Films Grown by Magnetron Sputtering 认领 引用 被引量：1
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作者 LIU Fa-min DING Peng SHI Wei-mei WANG Tian-min 《Chinese Journal of Aeronautics》 SCIE EI CAS 2007年第2期162-167,共6页
The TiO2-Co-TiO2 sandwich films were successfully grown on glass and silicon substrata making alternate use of radio frequency reactive magnetron sputtering and direct current magnetron sputtering. The structures and ... The TiO2-Co-TiO2 sandwich films were successfully grown on glass and silicon substrata making alternate use of radio frequency reactive magnetron sputtering and direct current magnetron sputtering. The structures and properties of these films were identified with X-ray diffraction （XRD）, Raman spectra and X-ray photoemission spectra （XPS）. It is shown that the sandwich film consists of two anatase TiO2 films with an embedded Co nano-film. The fact that, when the Co nano-film thickens, varied red shifts appear in optical absorption spectra may well be explained by the quantum confinement and tunnel effects. As for magnetic properties, the saturation magnetization, remnant magnetic induction and coercivity vary with the thickness of the Co nano-films. Moreover, the Co nano-film has a critical thickness of about 8.6 mn, which makes the coercivity of the composite film reach the maximum of about 1413 Oe. 展开更多
关键词 TiO2-Co-TiO2 sandwich films surface structure and properties optical and magnetic properties
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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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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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Oxidation Behavior of Fe26Cr1Mo Stainless Steel in the Presence of Ni-La_2O_3 Electrodeposited Composite Film 认领 引用
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作者 彭晓 周龙江 +1 位作者 李铁藩 吴维岁 《Journal of Rare Earths》 SCIE EI CAS 1997年第3期36-41,共6页
The oxidation behaviors of Fe26Cr1Mo with and without the Ni La 2O 3 electrodeposited composite film have been investigated by thermogravimetric analysis (TGA) and a scanning electron microscope equipped with an energ... The oxidation behaviors of Fe26Cr1Mo with and without the Ni La 2O 3 electrodeposited composite film have been investigated by thermogravimetric analysis (TGA) and a scanning electron microscope equipped with an energy dispersive analytical X ray system(SEM/EDAX). The experimental results show that the oxide scale growing on Fe26Cr1Mo exposed at 900 ℃ spalled severely during cooling, while after the stainless steel was coated with the Ni La 2O 3 electrodeposited composite film, its high temperature cyclic oxidation resistance was significantly improved. The reason is that a La 2O 3 modified NiO scale, which has a superior adhesion to the substrate, was formed on the Fe26Cr1Mo stainless steel coated with Ni La 2O 3 composite film. 展开更多
关键词 Rare earths La Ni La 2O 3 electrodeposited composite film Stainless steel Oxidation behavior
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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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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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Preparation and characterization of ZrO_2/TiO_2 composite photocatalytic film by micro-arc oxidation 认领 引用 被引量：9
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作者 罗强 蔡启舟 +4 位作者 李欣蔚 潘振华 李玉洁 陈喜娣 严青松 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第10期2945-2950,共6页
ZrO2/TiO2 composite photocatalytic film was produced on the pure titanium substrate using in-situ Zr（OH）4 colloidal particle by the micro-arc oxidation technique and characterized by scanning electron microscope （... ZrO2/TiO2 composite photocatalytic film was produced on the pure titanium substrate using in-situ Zr（OH）4 colloidal particle by the micro-arc oxidation technique and characterized by scanning electron microscope （SEM）, energy dispersive X-ray （EDX）, X-ray diffraction （XRD） and ultraviolet-visible （UV-Vis） spectrophotometer. The composite film shows a lamellar and porous structure which consists of anatase, futile and ZrO2 phases. The optical absorption edge of film is shifted to longer wavelength when ZrO2 is introduced to TiO2. Furthermore, the photocatalytic reaction rate constants of degradation of rhodamine B solution with ZrO2/TiO2 composite film and pure TiO2 film under ultraviolet irradiation are measured as 0.0442 and 0.0186 h 1, respectively. 展开更多
关键词 pure titanium micro-arc oxidation Zr（OH）4 colloidal particle ZrO2/TiO2 composite photocatalytic film
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Preparation and properties of a nano TiO_2/Fe_3O_4 composite superparamagnetic photocatalyst 认领 引用 被引量：9
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作者 LI Yuxiang ZHANG Mei +1 位作者 GUO Min WANG Xidong 《Rare Metals》 SCIE EI CAS 2009年第5期423-427,共5页
Nano TiO2/Fe3O4 composite particles with different molar ratios of TiO2 to Fe3O4 were prepared via sol-gel method. X-ray diffraction, transmission electron microscopy, and vibration sample magnetometry were used to ch... Nano TiO2/Fe3O4 composite particles with different molar ratios of TiO2 to Fe3O4 were prepared via sol-gel method. X-ray diffraction, transmission electron microscopy, and vibration sample magnetometry were used to characterize the TiO2/Fe3O4 particles. The photocatalytic activity of the particles was tested by degrading methyl blue solution under UV illumination （254 nm）. The results indicate that with the content of TiO2 increasing, the photocatalytic activity of the composite particles enhances, while the magnetism of the particles decreases. When the molar ratio of TiO2 to Fe3O4 is about 8, both the photocatalytic activity and magnetism of the TiO2/Fe3O4 particles are relatively high, and their photocatalytic activity remains well after repeated use. 展开更多
关键词 photocatalysis superparamagnetism sol-gel method TiO2 Fe3O4
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Optical and structural properties of highly porous shell structured Fe doped TiO_2 thin films 认领 引用 被引量：5
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作者 C.S.Naveen P.Raghu +3 位作者 H.M.Mahesh K.Narasimha Rao R.Rakesh Kumar A.R.Phani 《Rare Metals》 SCIE EI CAS CSCD 2014年第5期578-582,共5页
TiO2thin films with 0.2 wt%, 0.4 wt%, 0.6wt%, and 0.8 wt% Fe were prepared on glass and silicon substrates using sol–gel spin coating technique. The optical cut-off points are increasingly red-shifted and the absorpt... TiO2thin films with 0.2 wt%, 0.4 wt%, 0.6wt%, and 0.8 wt% Fe were prepared on glass and silicon substrates using sol–gel spin coating technique. The optical cut-off points are increasingly red-shifted and the absorption edge is shifted over the higher wavelength region with Fe content increasing. As Fe content increases, the optical band gap decreases from 3.03 to 2.48 eV whereas the tail width increases from 0.26 to 1.43 eV. The X-ray diffraction（XRD） patterns for doped films at 0.2 wt% and0.8 wt% Fe reveal no characteristic peaks, indicating that the film is amorphous whereas undoped TiO2exhibits（101） orientation with anatase phase. Thin films of higher Fe content exhibit a homogeneous, uniform, and nanostructured highly porous shell morphology. 展开更多
关键词 Fe TiO2 Porous shell Sol–gel
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