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Journal of Environmental Protection 2013年第1期4卷 136-143页

作者： Moisés I. Salazar-Gastélum Edgar A. Reynoso-Soto Shui W. Lin Sergio Perez-Sicairos Rosa M. Félix-Navarro Ingeniería en Nanotecnología Centro de Graduados e Investigación en Química del Instituto Tecnológico de Tijuana Tijuana México

In this paper we report the results of our experimental work conducted to decoloration of a well-known highly toxic Amaranth dye by electrochemical and photoelectrochemical methods. Throughout this investigation were used two different Dimensional Stable Anode (DSA) electrodes, namely, IrO2-Ru2O-SnO2-TiO2/Ti and Ru2O-SnO2-TiO2/Ti. The experimental results show that IrO2-Ru2O-SnO2-TiO2/Ti electrode has higher performance on amaranth decoloration than Ru2O-SnO2-TiO2/Ti electrode, but with the disadvantage of higher energy consumption. For higher degradation of Amaranth dye with both DSA electrodes, the process was carried out via photoelectrochemical method. Our experimental results clearly shown the decrease in absorbance of all UV-Vis peaks due to the mineralization of the azo dye;also, it was noteworthy photoelectrochemical process consumes less energy under the same experimental conditions than electrochemical process. The IrO2-Ru2O-SnO2-TiO2/Ti electrode reaches a higher degradation degree of Amaranth solutions than Ru2O-SnO2-TiO2/Ti electrode using a photoelectrochemical technique.

关键词： photoelectrochemical Decoloration DSA Azo Amaranth Dye

ATR-FTIR and XPS Evaluation of Alkyl Immobilization by Hydrosilylation on n-Si(111) for photoelectrochemical Cell Electrode

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Journal of Surface Engineered Materials and Advanced Technology 2013年第3期3卷 7-10页

作者： Toshihito Ohtake Department of Mechanical Systems Engineering Faculty of Engineering Aich University of Technology Gamagori Japan.

An electrode development was needed with high efficiency and low costs as next generation solar cells. We attempted the electrode fabrication for a photoelectrochemical cell by immobilizing functional groups on a n-Si(111) surface. The immobilization was applied by hydrosilylation terminated with ester (hydrophobic) or carbonyl (hydrophilic) group. Results confirmed the immobilization on the Si surface by measuring ATR-FTIR and XPS.

关键词： ATR-FTIR XPS Si Surface Hydrosilylation Immobilization photoelectrochemical Cell

Fabrication of CdS quantum dots sensitized ZnO nanorods/TiO2 nanosheets hierarchical heterostructure films for enhanced photoelectrochemical performance

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Fabrication of CdS quantum dots sensitized ZnO nanorods/TiO2...

Sb2Se3-based photocathodes for hydrogen production via photoelectrochemical water splitting

第六届新型太阳能电池材料科学与技术学术研讨会

作者： Guodong Zhao Xiaolin Liu Meiling Sun Guangchao Yin Laboratory of Functional Molecular and Materials School of physics and optoelectronic engineeringShandong University of Technology

A novel CdS/ZnO/TiO hierarchical heterostructure for photoelectrochemical(PEC) application was fabricated by growing ZnO nanorods(NRs) onto TiO nanosheets(NSs) with dominant high-energy {001} facets via hydrothermal method, subsequently coated CdS quantum-dots(QDs) sensitized layer via successive ionic layer adsorption and reaction(SILAR) technique. The growth of ZnO NRs obviously enlarges the specific surface area, while the deposition of CdS QDs significantly enhances the light harvesting ability. And the heterojunctions formed among TiO NSs, ZnO NRs and CdS QDs effectively promote the photogenerated charge carrier transport and separation, simultaneously inhibit the photogenerated electron-hole recombination. Moreover, it is notable that ZnO NRs trend to grow on the low-energy {101} facets of TiO NSs due to the impact of crystal facet controlling agent, which can effectively shorten the electron conduction path-ways and facilitate the photogenerated electron-hole separation due to the lower band edge position of {101} facets than that of {001} facets. As a result, the photocurrent density of the optimized CdS/ZnO/TiO composite film enhances to an excellent value of 12.1 mA/cm at a potential of 0 V vs SCE, which is more than 27 times higher than that of bare TiO NSs films. In addition, the corresponding optimal condition and physical mechanism were also discussed in the paper.

关键词： Hierarchical heterostructure High-energy {001} facets photoelectrochemical

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Sb2Se3-based photocathodes for hydrogen production via photo...

Enhanced CdS quantum dots loading density and charge transport by Sn4+ doping improve the photoelectrochemical performance of TiO2 nanosheets with highly exposed {001} facets

第八届新型太阳能材料科学与技术学术研讨会

作者： Shuo Chen Tian-Xiang Liu Ping Fan Guang-Xing Liang College of Physics and Optoelectronic Engineering Shenzhen University

photoelectrochemical(PEC) cells using semiconductor electrodes can efficiently absorb solar energy and perform chemical reactions, which are considered as a very attractive strategy to produce renewable, sustainable, and clean hydrogen energy. Antimony selenide(Sb2 Se3) has been widely investigated for constructing PEC involved photocathodes benefitting of its low cost, low toxicity, suitable band gap, superior optoelectronic properties, and outstanding photo-corrosion stability. Since the first Sb2 Se3 photocathode for PEC water splitting reported by Moon’s group in 2017, extensive research with various architectures and engineering efforts(i.e., absorber engineering, interfaces engineering, co-catalyst engineering and tandem engineering) has been focused on this interesting scenario. During a very short period, it achieved a rapid development in terms of photocurrent from 2 mA cm to 30 mA cm, a record Half-cell solar-to-hydrogen conversion efficiency(η) of 3.8% and a record η exceeding 10%. It undoubtedly demonstrates that SbSe and some analogous chalcogenide semiconductors possess great application potential in clean hydrogen production via PEC water splitting.

关键词： Sb2Se3 photocathodes photoelectrochemical water splitting solar-to-hydrogen

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Enhanced CdS quantum dots loading density and charge transpo...

In situ growth of single-crystal TiO2 nanorod arrays on Ti substrate： Controllable synthesis and photoelectro- chemical water splitting

第六届新型太阳能电池材料科学与技术学术研讨会

作者： Xiaolin Liu Guodong Zhao Meiling Sun Guangchao Yin School of Physics and Optoelectronic Engineering Shandong University of Technology

The Sn doping has been demonstrated to be an effective strategy to fundamentally enhance the photon absorption, improve the charge transport and increase the surface quantum-dots loading density of TiO nanosheets with highly exposed {001} facets, thereby improve their photoelectrochemical performance. And the STO nanosheet arrays(9 mM) enhance light absorption and decrease electron transport resistance, thus improving the photoelectrochemical properties due to the generation of doping energy level and mixed-cation composition of SnTiO . Remarkably, compared to the pristine TiO NSs, the amount of surface active reaction sites of STO NSs increases arising from Sn doping process, which is beneficial to sensitize more uniform and dense CdS quantum-dots on the surface of STO NSs, thereby increasing the heterojunction areas and enhancing the visible light absorption. Additionally, the CdS/STO photoelectrodes show the maximum photocurrent density of 5.71 mA cm at 0 V versus Ag/AgCl, which is 11.4 and 1.7 times higher than those of TiO and CdS/TiO photoelectrodes respectively, due to the enhanced visible light absorption ability, increased heterojunction areas and superior photogenerated charge carrier separation and transport properties.

关键词： TiO2 nanosheets Sn4+ doping Quantum dots photoelectrochemical

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Nano Research 2017年第3期10卷 1021-1032页

作者： Tingting Zhang Zia Ur Rahman Ning Wei Yupeng Liu Jun Liang Daoai Wang State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics Chinese Academy ofSciences Lanzhou 730000 China University of Chinese Academy of Sciences Beijing 100049 China Qingdao Center for Resource Chemistry and New Materials Qingdao 266100 China

Despite one-dimensional （1D） semiconductor nanostructure arrays attracting increasing attention due to their many advantages, highly ordered TiO2 nanorod arrays （TiO2 NR） are rarely grown in situ on Ti substrates. Herein, a feasible method to fabricate TiO2 NRs on Ti substrates by using a through-mask anodization process is reported. Self-ordered anodic aluminum oxide （AAO） overlaid on Ti substrate was used as a nanotemplate to induce the growth of TiO2 NRs. The NR length and diameter could be controlled by adjusting anodization parameters such as electrochemical anodization voltage, anodization time and temperature, and electrolyte composition. Furthermore, according to the proposed NR formation mechanism, the anodized Ti ions migrate and deposit in the AAO nanochannels to form Ti（OH）4 or amorphous TiO2 NRs under electric field, owing to the confinement effect of the template. photoelectrochemical tests indicated that, after hydrogenation, the TiO2 NRs presented higher photocurrent density under simulated sunlight and visible light illuminations, suggesting their potential use in photoelectrochemical water splitting, photocatalysis, solar cells, and sensors.

关键词： hydrogenation TiO2 nanorod arrays in situ preparation through-hole anodic alu-minum oxide (AAO) mask photoelectrochemical

Ultrasonic-assisted pyrolyzation fabrication of reduced SnO2-x/g-C3N4 heterojunctions： Enhance photoelectro- chemical and photocatalytic activity under visible LED light irradiation

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Nano Research 2016年第7期9卷 1969-1982页

作者： Kai Li Xiaoqiao Zeng Shanmin Gao Lu Ma Qingyao Wang Hui Xu Zeyan Wang Baibiao Huang Ying Dai Jun Lu College of Chemistry and Materials Science Ludong University Yantai 264025 China Chemical Sciences and Engineering Division Argonne National Laboratory Argonne IL 60439 USA State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China X-Ray Science Division Argonne National Laboratory Argonne IL 60439 USA

Novel SnO2-x/g-C3N4 heterojunction nanocomposites composed of reduced SnO2 nanoparticles and exfoliated g-CBN4 nanosheets were prepared by a convenient one-step pyrolysis method. The structural, morphological, and optical properties of the as-prepared nanocomposites were characterized in detail, indicating that the aggregation of g-C3N4 nanosheets was prevented by small, well-dispersed SnO2_x nanoparticles. The ultraviolet-visible spectroscopy absorption bands of the nanocomposites were shifted to a longer wavelength region than those exhibited by pure SnO2 or g-CgN4. The charge transfer and recombination processes occurring in the nanocomposites were investigated using linear scan voltammetry and electrochemical impedance spectroscopy. Under 30-W visible-light-emitting diode irradiation, the heterojunction containing 27.4 wt.% SnO2-x exhibited the highest photocurrent density of 0.0468 ***-2, which is 33.43 and 5.64 times larger than that of pure SnO2 and g-C3N4, respectively. The photocatalytic activity of the heterojunction material was investigated by degrading rhodamine B under irradiation from the same light source. Kinetic study revealed a promising degradation rate constant of 0.0226 min^-1 for the heterojunction containing 27.4 wt.% SnO2-x, which is 32.28 and 5.79 times higher than that of pure SnO2 and g-C3N4, respectively. The enhanced photoelectrochemical and photocatalytic performances of the nanocomposite may be due to its appropriate SnO2x content and the compact structure of the junction between the SnO2-x nanoparticles and the g-C3N4 nanosheets, which inhibits the recombination of photogenerated electrons and holes.

关键词： reduced SnO2x-x g-C3N4 heterojunctions photoelectrochemical light-emitting diodesource

可回收型各向同性热解石墨导电基底促进光电化学水分解

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Science China Materials 2023年第12期66卷 4663-4668页

作者：徐伟甄超邱建航杜宇飞白朔成会明刘岗 Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Shi-Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

导电基底发挥着收集和传输光生电荷的关键作用,是光电化学(PEC)水分解用光电极不可或缺的重要组成部分,但构建高效光电极鲜受关注.本工作中,基于各向同性热解石墨(IPG)高电导率和高功函的特性,我们开发了各向同性热解石墨(IPG)作为一种... 详细信息

导电基底发挥着收集和传输光生电荷的关键作用,是光电化学(PEC)水分解用光电极不可或缺的重要组成部分,但构建高效光电极鲜受关注.本工作中,基于各向同性热解石墨(IPG)高电导率和高功函的特性,我们开发了各向同性热解石墨(IPG)作为一种导电基底来构建高性能光电极.相比于氟掺杂的二氧化锡(FTO)和金属箔片等广泛使用的导电基底,该光电极能与Cu_(2)O形成欧姆接触,因此所得IPG/Cu_(2)O光电阴极呈现出比FTO/Cu_(2)O光阴极高60%的光电流密度.IPG基底上经过高温氮化所得的Ta_(3)N5薄膜(IPG/Ta_(3)N_(5))可以获得与Ta箔负载的Ta_(3)N_(5)光阳极相媲美的PEC性能.此外,Ta箔由于在氮化过程中会出现严重氢脆问题而不能循环使用,而IPG基底则可以循环用于光电极的制备,且能生长出具有相同PEC性能的半导体薄膜.这项工作为通过碳基导电基底构建用于PEC水分解的高效光电极提供了一种有吸引力的可替代选择.

关键词： isotropic pyrolytic graphite photoelectrochemical recycleable ohmic contact conductive substrate

Synergetic effect of graphene and Co(OH)2 as cocatalysts of TiO2 nanotubes for enhanced photogenerated cathodic protection

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Journal of Materials Science & Technology 2020年第2期37卷 55-63页

作者： Xiayu Lu Li Liu Xuan Xie Yu Cui Emeka E.Oguzie Fuhui Wang Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang110016China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang110819China Electrochemistry and Materials Science Research Laboratory Department of ChemistryFederal University of TechnologyP.M.B.1526OwerriNigeria

A layer of graphene(GR)particles was successfully deposited at the interface between Co(OH)2 nanoparticles and TiO2 nanotubes,aiming to improve the photoelectrochemical performance of the large-bandgap semiconductor *** obtained Co(OH)2/GR/TiO2 was extensively characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray photoelectron spectroscopy(XPS),UV–vis absorption spectra and photoluminescence(PL)emission *** impedance spectra,photogenerated potential-time(E-t),photocurrent density-time(i-t)and i-E curves and open circuit potential(OCP)curves were measured to investigate the photoelectrochemical activities and photogenerated cathodic protection *** results revealed that Co(OH)2/GR/TiO2 exhibits excellent photoelectrochemical and photogenerated cathodic performance due to synergistic effect between Co(OH)2 and ***(OH)2 and graphene co-modified TiO2 photoanode could provide an effective protection for 304 stainless steel(304 SS)in 3.5 wt%Na Cl solution for 12 h,which would be promising for future practical applications in the field of marine corrosion protection.

关键词： TiO2 nanotubes Graphene Co(OH)2 nanoparticles photoelectrochemical performance Photogenerated cathodic protection

Enhancing BiVO_(4)photoanode performance by insertion of an epitaxial BiFeO_(3)ferroelectric layer

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Journal of Energy Chemistry 2024年第2期89卷 71-78,I0003页

作者： Haejin Jang Yejoon Kim Hojoong Choi Jiwoong Yang Yoonsung Jung Sungkyun Choi Donghyeon Lee Ho Won Jang Sanghan Lee School of Materials Science and Engineering Gwangju Institute of Science and TechnologyGwangju 61005Republic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea

BiVO_(4)(BVO)is a promising material as the photoanode for use in photoelectrochemical ***,the high charge recombination and slow charge transfer of the BVO have been obstacles to achieving satisfactory photoelectrochemical *** address this,various modifications have been attempted,including the use of ferroelectric *** materials can form a permanent polarization within the layer,enhancing the separation and transport of photo-excited electron-hole *** this study,we propose a novel approach by depositing an epitaxial BiFeO_(3)(BFO)thin film underneath the BVO thin film(BVO/BFO)to harness the ferroelectric property of *** self-polarization of the inserted BFO thin film simultaneously functions as a buffer layer to enhance charge transport and a hole-blocking layer to reduce charge *** a result,the BVO/BFO photoanodes showed more than 3.5 times higher photocurrent density(0.65 mA cm^(-2))at 1.23 V_(RHE)under the illumination compared to the bare BVO photoanodes(0.18 m A cm^(-2)),which is consistent with the increase of the applied bias photon-to-current conversion efficiencies(ABPE)and the result of electrochemical impedance spectroscopy(EIS)*** results can be attributed to the self-polarization exhibited by the inserted BFO thin film,which promoted the charge separation and transfer efficiency of the BVO photoanodes.

关键词： photoelectrochemical Photoanode BiVO_(4) Ferroelectric materials BiFeO_(3)