Citation: Dashuai Li, Yu Huang, Songmei Li, Changhua Wang, Yingying Li, Xintong Zhang, Yichun Liu. Thermal coupled photoconductivity as a tool to understand the photothermal catalytic reduction of CO₂[J]. Chinese Journal of Catalysis, ;2020, 41(1): 154-160. doi: S1872-2067(19)63475-3 shu

Thermal coupled photoconductivity as a tool to understand the photothermal catalytic reduction of CO₂

Key Laboratory of UV-Emitting Materials and Technology of Chinese Ministry of Education, Northeast Normal University, Changchun 130024, Jilin, China

Received Date: 30 June 2019
Revised Date: 5 August 2019

Fund Project: This work was supported by the Natural Science Foundation of China (51072032, 51372036, 51102001), the Key Project of Chinese Ministry of Education (113020A), the 111 project (B13013), and Jilin Province Science and Technology Development Plan (20180101175JC, 20160520170JH).

Photocatalysis shows great promise in the field of solar energy conversion. One of the reasons for this is because it promotes the development of multi-field-coupled catalysis. In order to explore the principles of multi-field-coupled catalytic reactions, an in situ multi-field-coupled characterization technique is required. In this study, we obtained hydrogenated ST-01 TiO₂ and observed enhanced catalytic activity by thermal coupled photocatalysis. In situ photoconductivity was employed to understand the activity enhancement. The effects of the reaction temperature, reaction atmosphere, and oxygen vacancy (Ov) on the photoconductivity of TiO₂ were studied. After coupling thermal into photoconductivity measurement, highly active Ov-TiO₂ displayed rapid decay of photoconductivity in a CO₂ atmosphere and slow decay of photoconductivity in a N₂ atmosphere. These phenomena revealed that photothermal coupling assisted the detrapping of electrons at the Ov surface and promoted electron transfer to CO₂, which clearly explained the high photothermal catalytic activity of Ov-TiO₂. This study demonstrated that photoconductivity is a useful tool to help understand photothermal catalytic phenomena.
- Photoconduction,
- Photothermalcatalytic,
- Titanium dioxide,
- Oxygen vacancy,
- Carbon dioxide reduction
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Thermal coupled photoconductivity as a tool to understand the photothermal catalytic reduction of CO2

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Thermal coupled photoconductivity as a tool to understand the photothermal catalytic reduction of CO₂