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Hierarchical TiO2 nanowire/microflower photoanode modified with Au nanoparticles for efficient photoelectrochemical water splitting
Duan, Yanyan; Zhou, Shaochen; Chen ZH(陈志鸿); Luo, Jianmin; Zhang, Mei; Wang F(王富); Xu, Tao; Wang, Chuanyi
Department广州中国科学院沈阳自动化研究所分所
Source PublicationCatalysis Science and Technology
ISSN2044-4753
2018
Volume8Issue:5Pages:1395-1403
Indexed BySCI ; EI
EI Accession number20181104893563
WOS IDWOS:000427157000018
Contribution Rank2
Funding OrganizationNational Natural Science Foundation of China ; '1000 Talent Program' (The Recruitment Program of Global Experts) ; Guangdong Provincial Science and Technology Project ; Support Scheme of Guangzhou for Leading Talents in Innovation and Entrepreneurship funding from Guangzhou ; U.S. National Science Foundation
Abstract

An efficient photoelectrochemical water splitting system is developed based on a hierarchical TiO2nanowire/microflower (H-TiO2) photoanode, which is synthesized via a one-step hydrothermal process. The H-TiO2structure is formed via three primary self-assembly processes and simultaneously offers excellent ultraviolet light absorption capacity and large specific surface area. The H-TiO2photoanode achieves a 1.3 fold enhancement in photocurrent density compared to its TiO2nanowire-based counterpart at 1.23 V vs. reversible hydrogen electrode (the theoretical potential for water electrolysis). More strikingly, by incorporating the surface plasmon resonance (SPR) effect from Au nanoparticles (NPs), the resulting Au/H-TiO2-based photoanodes (Au/H-TiO2) exhibit an about two-fold enhancement in photocurrent density under both simulated sunlight and visible-light illumination. Moreover, the maximum photoconversion efficiency of Au/H-TiO2gives three fold enhancement compared to that in the absence of Au NPs. Significantly, Au NPs incorporated on the H-TiO2surface also serve as co-catalysts like Pt under white-light illumination, reducing the onset potential by about 0.15 V and the current saturation potential by about 0.18 V. The enhanced photoactivity under white light is due to the co-action of electron transfer from the efficient carrier separation of H-TiO2(ultraviolet part) and Au to H-TiO2under the SPR effect (visible part). The present study provides a new strategy for designing and fabricating TiO2-based devices with favorable energy conversion efficiency for photoelectrochemical water splitting. © 2018 The Royal Society of Chemistry.

Language英语
WOS SubjectChemistry, Physical
WOS KeywordSENSITIZED SOLAR-CELLS ; VISIBLE-LIGHT ; NANOTUBE ARRAYS ; NANOWIRE ARRAYS ; HYDROGEN GENERATION ; PHOTOCATALYTIC PERFORMANCE ; OXIDATION ; SEMICONDUCTOR ; NANOCRYSTALS ; NANORODS
WOS Research AreaChemistry
Funding ProjectNational Natural Science Foundation of China[21473248] ; National Natural Science Foundation of China[21503271] ; '1000 Talent Program' (The Recruitment Program of Global Experts) ; Guangdong Provincial Science and Technology Project[2017A050506009] ; Support Scheme of Guangzhou for Leading Talents in Innovation and Entrepreneurship funding from Guangzhou[2016015] ; U.S. National Science Foundation[CBET-1150617]
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sia.cn/handle/173321/21570
Collection广州中国科学院沈阳自动化研究所分所
Corresponding AuthorWang F(王富)
Affiliation1.Laboratory of Environmental Science and Technology, Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi 830011, China
2.Shenyang Institute of Automation, Chinese Academy of Sciences, Guangzhou 511458, China
3.Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, IL 60115, United States
Recommended Citation
GB/T 7714
Duan, Yanyan,Zhou, Shaochen,Chen ZH,et al. Hierarchical TiO2 nanowire/microflower photoanode modified with Au nanoparticles for efficient photoelectrochemical water splitting[J]. Catalysis Science and Technology,2018,8(5):1395-1403.
APA Duan, Yanyan.,Zhou, Shaochen.,Chen ZH.,Luo, Jianmin.,Zhang, Mei.,...&Wang, Chuanyi.(2018).Hierarchical TiO2 nanowire/microflower photoanode modified with Au nanoparticles for efficient photoelectrochemical water splitting.Catalysis Science and Technology,8(5),1395-1403.
MLA Duan, Yanyan,et al."Hierarchical TiO2 nanowire/microflower photoanode modified with Au nanoparticles for efficient photoelectrochemical water splitting".Catalysis Science and Technology 8.5(2018):1395-1403.
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