Citation: Ji-Chao Wang, Xiu Qiao, Weina Shi, Huiling Gao, Lingchen Guo. Enhanced Photothermal Selective Conversion of CO₂ to CH₄ in Water Vapor over Rod-Like Cu and N Co-Doped TiO₂[J]. Chinese Journal of Structural Chemistry, ;2022, 41(12): 221203. doi: 10.14102/j.cnki.0254-5861.2022-0191 shu

Enhanced Photothermal Selective Conversion of CO₂ to CH₄ in Water Vapor over Rod-Like Cu and N Co-Doped TiO₂

Ji-Chao Wang ^{1, 3} ,
Xiu Qiao ¹ ,
Weina Shi ^2,, ,
Huiling Gao ^1,, ,
Lingchen Guo ¹

1.
College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang 453000, China
2.
School of Chemistry and Materials Engineering, Xinxiang University, Xinxiang 453000, China
3.
School of Ecology and Environment, Zhengzhou University, Zhengzhou 450052, China

Corresponding author: Weina Shi, shiweina516@163.com Huiling Gao, mzfghl@hist.edu.cn
Received Date: 26 September 2022
Accepted Date: 7 October 2022
Available Online: 11 October 2022

Figures(10)

Enhancing catalytic efficiency and selectivity is critical issues for CO₂ conversion. The rod-like Cu/N co-doped TiO₂ samples (Cu/N-TiO₂) were synthesized by the electrospinning-calcination method. The substitutional Cu and interstitial N doping not only enhanced visible-light absorption ability, but also formed the Ti(Ⅲ) sites. The obviously synergistic effect between the photocatalysis and thermalcatalysis appeared for CO₂ conversion over the 8-Cu/N-TiO₂ catalyst. After 9 h visible-light-illumination at 160 ℃, the CO, CH₄ and O₂ yields reached 49.7, 1455.1 and 2910.2 μmol/g_cat, respectively. In the 7^th cycling, the yields of two main CH₄ and O₂ products were slightly down by less than 11.5%, and the selectivity of CH₄ product kept above 98%. Combined with the theoretical surface mode, Cu/N co-doping could promote the adsorption-ability for H₂O and CO₂ molecules and reduce activation-energy for CO₂ conversion. Hence, the co-doping construction showed a great significance of designing efficient photothermal catalysts for the CO₂ conversion application.
- CO₂ conversion,
- photothermal catalysis,
- rod-like,
- TiO₂,
- co-doped
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Enhanced Photothermal Selective Conversion of CO2 to CH4 in Water Vapor over Rod-Like Cu and N Co-Doped TiO2

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Enhanced Photothermal Selective Conversion of CO₂ to CH₄ in Water Vapor over Rod-Like Cu and N Co-Doped TiO₂