Citation: ZHANG Chao-Ying, WANG Ping, LIU Yan-Yan, HU Ling-Na. Synergistic Effect of Graphene as Electron-Transfer Mediator and Ni (Ⅱ) as Interfacial Catalytic Active Site for Enhanced H₂-Production Performance of TiO₂[J]. Chinese Journal of Inorganic Chemistry, ;2017, 33(7): 1132-1138. doi: 10.11862/CJIC.2017.170 shu

Synergistic Effect of Graphene as Electron-Transfer Mediator and Ni (Ⅱ) as Interfacial Catalytic Active Site for Enhanced H₂-Production Performance of TiO₂

School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China

Corresponding author: WANG Ping, wangping0904@whut.edu.cn
Received Date: 21 March 2017
Revised Date: 15 June 2017

Figures(10)

Highly efficient TiO₂ photocatalysts co-modified by reduced graphene oxide (rGO) as electron-transfer mediator and Ni (Ⅱ) as interfacial catalytic active-sites (referred to as Ni (Ⅱ)/TiO₂-rGO) were synthesized via a two-step process including the initial hydrothermal method of rGO on the TiO₂ surface and the following low-temperature impregnation method of Ni (Ⅱ) on the rGO.Photocatalytic experimental results indicated that all resulted Ni (Ⅱ)/TiO₂-rGO photocatalysts exhibited obviously high H₂-production performance.The highest H₂-production rate of the resultant Ni (Ⅱ)/TiO₂-rGO (0.1 mol·L^-1) reached 77.0 μmol·h^-1, while this value was higher than that of the TiO₂(16.4 μmol·h^-1) and TiO₂-rGO (28.0 μmol·h^-1) by a factor of 4.70 and 2.75, respectively.On the basis of the experimental results, a synergistic effect mechanism of rGO and Ni (Ⅱ) bi-cocatalysts was proposed to account for its enhanced H₂-production performance, namely, rGO functions as an electron-transfer mediator to rapidly capture and transfer the photogenerated electron from TiO₂ surface, while the Ni (Ⅱ) cocatalyst serves as an effectively active site for the following reduction.
- TiO₂,
- synergistic effect,
- reduced graphene oxide (rGO),
- electron-transfer mediator,
- Ni(Ⅱ),
- interfacial catalytic active-site
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沈阳化工大学材料科学与工程学院沈阳 110142

Synergistic Effect of Graphene as Electron-Transfer Mediator and Ni (Ⅱ) as Interfacial Catalytic Active Site for Enhanced H2-Production Performance of TiO2

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通讯作者: 陈斌, bchen63@163.com

Synergistic Effect of Graphene as Electron-Transfer Mediator and Ni (Ⅱ) as Interfacial Catalytic Active Site for Enhanced H₂-Production Performance of TiO₂