Cu Sites Synergistic Double Heterojunction Engineering for Enhancing CO2 Photoreduction

doi:10.1007/s40242-025-5090-0

Chemical Research in Chinese Universities ›› 2025, Vol. 41 ›› Issue (4): 812-821.doi: 10.1007/s40242-025-5090-0

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Cu Sites Synergistic Double Heterojunction Engineering for Enhancing CO₂ Photoreduction

TANG Liguang¹, XU Huan², XU Yangrui³, CHENG Yu³, CHU Yansong², FENG Sheng⁴, LIU Haixia¹, LIU Xinlin², SONG Minshan⁵, LU Ziyang^3,6

1. School of Material Science and Engineering, Jiangsu University, Zhenjiang 212013, P. R. China;
2. School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, P. R. China;
3. School of the Environment and Safety Engineering, School of Emergency Management, Key Laboratory of Zhenjiang, Jiangsu University, Zhenjiang 212013, P. R. China;
4. School of the Environment and Safety Engineering, Changzhou University, Changzhou 320400, P. R. China;
5. School of Management, Jiangsu University, Zhenjiang 212013, P. R. China;
6. Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment Suzhou University of Science and Technology, Suzhou 215009, P. R. China

Received:2025-05-10 Accepted:2025-06-30 Online:2025-08-01 Published:2025-07-24
Supported by:
This work was supported by the National Natural Science Foundation of China (No. 22278190), the Qing Lan Project of Jiangsu Province, China (No. 2023), the Jiangsu Provincical Graduate Research and Practice Innovation Project, China (No. KYCX24_3946), the Project of the New Acetic Acid Catalyst Research and Development Key Laboratory of Zhenjiang, China (No. SS2024001), and the Project of the Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, China.

Abstract

Abstract: The weak adsorption capacity of active sites for CO₂ and the rapid recombination of photogenerated charges are the key to limiting the photocatalytic reduction activity. How to construct a system to achieve strong adsorption of CO₂ and rapid charge separation is particularly important. Based on this, ZnS/Bi₂S₃/CuS composite photocatalyst with double heterojunction structure was constructed by a simple in-situ hydrothermal method. The interface charge contact of the double heterojunction structure formed a built-in electric field, which effectively inhibited the recombination of electron holes, thereby promoting charge separation. Electrons were enriched on CuS, and the strong adsorption energy of Cu sites to CO₂ can be used to rapidly react and improve the photocatalytic activity. Compared with the single substance, the performance of CH₄ and CO was improved by up to 4 and 3.26 times. Density functional theory (DFT) and in situ infrared proved the photocatalytic reaction mechanism.

Key words: Photocatalytic CO₂ reduction, Double heterojunction, Adsorption energy, Charge separation

TANG Liguang, XU Huan, XU Yangrui, CHENG Yu, CHU Yansong, FENG Sheng, LIU Haixia, LIU Xinlin, SONG Minshan, LU Ziyang. Cu Sites Synergistic Double Heterojunction Engineering for Enhancing CO₂ Photoreduction[J]. Chemical Research in Chinese Universities, 2025, 41(4): 812-821.

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Cu Sites Synergistic Double Heterojunction Engineering for Enhancing CO₂ Photoreduction

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