Citation: XIE Yi-Ting, TAN Juan, WANG Ya-Fei, YU Jing, LIU Jing. Synthesis and Photocatalytic Performance of Mesoporous rGO/m-TiO₂ Composites for Hydrogen Production by Photocatalytic Water Splitting[J]. Chinese Journal of Inorganic Chemistry, ;2018, 34(12): 2153-2160. doi: 10.11862/CJIC.2018.267 shu

Synthesis and Photocatalytic Performance of Mesoporous rGO/m-TiO₂ Composites for Hydrogen Production by Photocatalytic Water Splitting

School of Chemical Engineering, Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian, Liaoning 116024, China

Corresponding author: TAN Juan, tanjuan@dlut.edu.cn
Received Date: 16 May 2018
Revised Date: 25 September 2018

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Mesoporous titanium dioxide (m-TiO₂) was synthesized by using Titanium tetraisopropanolate (TTIP) as the raw material and cetyltrimethyl ammonium bromide (CTAB) as the template via sol-gel method. The effects of the synthesis temperature, the amount of H₂O and template in the initial gel, as well as the calcination temperature on the photocatalytic hydrogen production activity of m-TiO₂ were investigated. The results show that the structure of the m-TiO₂ sample transferred from amorphous to anatase phase after calcined under 350℃ for 3 h. The crystallinity of the anatase phase increased with calcination temperature increasing and most of the anatase phase transferred to rutile phase after calcined above 550℃. The sample which synthesized at 30℃, with n_CTAB/n_TiO₂=0.2 and n_H₂O/n_TiO₂=100, then calcined at 450℃ showed excellent photocatalytic activity of splitting water under UV irradiation. When the amount of catalyst was 0.4 g·L^-1 and the methanol concentration was 20%(V/V), the hydrogen production rate of m-TiO₂ reached as high as 170 mmol·g^-1·h^-1. A series of rGO/m-TiO₂ samples with different amount of rGO were synthesized by using hydrothermal method. When w_GO/w_TiO₂ was 0.01, the hydrogen production rate of the sample was 241 mmol·g^-1·h^-1 under UV light irradiation, and the energy conversion efficiency reached 7.4%, 42.3% higher than that of m-TiO₂. Under visible light irradiation, its hydrogen production rate reached 9 mmmol·g^-1·h^-1.
- mesoporous materials,
- titanium dioxidetitanium,
- photocatalysis,
- hydrogen production,
- water splitting
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Synthesis and Photocatalytic Performance of Mesoporous rGO/m-TiO2 Composites for Hydrogen Production by Photocatalytic Water Splitting

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通讯作者: 陈斌, bchen63@163.com

Synthesis and Photocatalytic Performance of Mesoporous rGO/m-TiO₂ Composites for Hydrogen Production by Photocatalytic Water Splitting