Hierarchical TiO2 nanowire/microflower photoanode modified with Au nanoparticles for efficient photoelectrochemical water splitting
Duan, YY (Duan, Yanyan); Zhou, SC (Zhou, Shaochen); Chen, ZH (Chen, Zhihong); Luo, JM (Luo, Jianmin); Zhang, M (Zhang, Mei); Wang, F (Wang, Fu); Xu, T (Xu, Tao); Wang, CY (Wang, Chuanyi)
2018
Source PublicationCATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
Volume8Issue:5Pages:1395-1403
Abstract

An efficient photoelectrochemical water splitting system is developed based on a hierarchical TiO2 nanowire/ microflower (H-TiO2) photoanode, which is synthesized via a one-step hydrothermal process. The H-TiO2 structure is formed via three primary self-assembly processes and simultaneously offers excellent ultraviolet light absorption capacity and large specific surface area. The H-TiO2 photoanode achieves a 1.3 fold enhancement in photocurrent density compared to its TiO(2)nanowire-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-TiO2 gives three fold enhancement compared to that in the absence of Au NPs. Significantly, Au NPs incorporated on the H-TiO2 surface 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-TiO2 under 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.

DOI10.1039/c7cy02641b
Indexed BySCI
WOS IDWOS:000427157000018
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/5260
Collection中国科学院特殊环境功能材料与器件重点试验室
Affiliation1.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Key Lab Funct Mat & Devices Special Environm, Lab Environm Sci & Technol, Urumqi 830011, Peoples R China
2.Chinese Acad Sci, Shenyang Inst Automat, Guangzhou 511458, Guangdong, Peoples R China
3.Northern Illinois Univ, Dept Chem & Biochem, De Kalb, IL 60115 USA
Recommended Citation
GB/T 7714
Duan, YY ,Zhou, SC ,Chen, ZH ,et al. Hierarchical TiO2 nanowire/microflower photoanode modified with Au nanoparticles for efficient photoelectrochemical water splitting[J]. CATALYSIS SCIENCE & TECHNOLOGY,2018,8(5):1395-1403.
APA Duan, YY .,Zhou, SC .,Chen, ZH .,Luo, JM .,Zhang, M .,...&Wang, CY .(2018).Hierarchical TiO2 nanowire/microflower photoanode modified with Au nanoparticles for efficient photoelectrochemical water splitting.CATALYSIS SCIENCE & TECHNOLOGY,8(5),1395-1403.
MLA Duan, YY ,et al."Hierarchical TiO2 nanowire/microflower photoanode modified with Au nanoparticles for efficient photoelectrochemical water splitting".CATALYSIS SCIENCE & TECHNOLOGY 8.5(2018):1395-1403.
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