The charge transfer mechanism of Bi modified TiO2 nanotube arrays: TiO2 serving as a "charge-transfer-bridge" | |
Jiao ZB(焦正波)1,2; Shang, Mingdong1; Liu JM(刘佳梅)1; Lu GX(吕功煊)1; Wang, Xuesen2; Bi YP(毕迎普)1; Bi YP(毕迎普); Jiao ZB(焦正波) | |
刊名 | Nano Energy |
2017 | |
卷号 | 31页码:96-104 |
关键词 | Bismuth Titanium Dioxide Heterostructure Charge transfer Photoelectrochemical In situ XPS |
ISSN号 | 2211-2855 |
通讯作者 | 焦正波 ; 毕迎普 |
英文摘要 | The surface of Bi nanoparticles would be oxidized to amorphous Bi2O3 layer with thickness about 7 nm in the air. Until now, it is still unclear about the different roles of Bi and Bi2O3 in the photocatalysis when Bi nanoparticles are deposited on semiconductors. In this work, Bi nanospheres have been decorated on the top aperture of TiO2 nanotube arrays by vapor deposition method, and an X-ray photoelectron spectroscopy combined with synchronous illumination technique is applied to explore the charge transfer mechanism. Under visible light, the electrons generated from the surface plasmon resonance of Bi would transfer to the conduction band of TiO2 first, and then migrate to the oxide surface of Bi2O3 and reduce it to metallic Bi. During this process, TiO2 serves as a “charge-transfer-bridge” and the reductive reaction would not occur in the absence of it. And the energy of the immigrant electrons differs from the self-excited ones, which can not trigger the reductive reaction. These findings have resolved the puzzles about the utilization of Bi, and figured out the different roles of Bi and Bi2O3 in the photocatalytic process. Furthermore, the photoelectrochemical activities of Bi modified TiO2 nanotubes arrays have been systematically explored and it is found that the photocurrent of TiO2 nanotube arrays could be significantly improved due to the surface plasmon resonance of Bi as well as the optimized charge transfer and transport characteristics. |
学科主题 | 物理化学与绿色催化 |
收录类别 | SCI |
资助信息 | the “Hundred Talents Program” of the Chinese Academy of Science;National Natural Science Foundation of China (21273255;21303232);Youth Innovation Promotion Association of the Chinese Academy of Sciences (2014380) |
语种 | 英语 |
WOS记录号 | WOS:000393446500012 |
内容类型 | 期刊论文 |
源URL | [http://210.77.64.217/handle/362003/21426] |
专题 | 兰州化学物理研究所_ERC国家工程研究中心 兰州化学物理研究所_OSSO国家重点实验室 |
通讯作者 | Bi YP(毕迎普); Jiao ZB(焦正波) |
作者单位 | 1.State Key Laboratory for Oxo Synthesis & Selective Oxidation, and National Engineering Research Center for Fine Petrochemical Intermediates, Lanzhou Institute of Chemical Physics, CAS, Lanzhou 730000, China 2.Department of Physics, National University of Singapore, 117542 Singapore |
推荐引用方式 GB/T 7714 | Jiao ZB,Shang, Mingdong,Liu JM,et al. The charge transfer mechanism of Bi modified TiO2 nanotube arrays: TiO2 serving as a "charge-transfer-bridge"[J]. Nano Energy,2017,31:96-104. |
APA | Jiao ZB.,Shang, Mingdong.,Liu JM.,Lu GX.,Wang, Xuesen.,...&焦正波.(2017).The charge transfer mechanism of Bi modified TiO2 nanotube arrays: TiO2 serving as a "charge-transfer-bridge".Nano Energy,31,96-104. |
MLA | Jiao ZB,et al."The charge transfer mechanism of Bi modified TiO2 nanotube arrays: TiO2 serving as a "charge-transfer-bridge"".Nano Energy 31(2017):96-104. |
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