Li Xin, Wei Yanan, Ma Changchang, Jiang Haopeng, Gao Ming, Zhang Simin, Liu Wenkai, Huo Pengwei, Wang Huiqin, Wang Lili
Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, PR China.
ACS Appl Mater Interfaces. 2021 Mar 17;13(10):11755-11764. doi: 10.1021/acsami.0c18809. Epub 2021 Mar 8.
Efficient electron transmission is an important step in the process of CO photoreduction. In this paper, a multi-interface-contacted InS/Au/reduced graphene oxide (rGO) photocatalyst with the fluorescence resonance energy transfer (FRET) mechanism has been successfully prepared by the solvothermal, self-assembly, and hydrothermal reduction processes. Photocatalytic CO reduction experiments showed that the InS/Au/rGO (IAr-3) composite exhibited excellent photoreduction performance and photocatalytic stability. The yields of CO and CH obtained after the photoreduction process with IAr-3 as the catalyst were around 4 and 6 times higher than those of pure InS, respectively. Photoelectrochemical analysis showed that the multi-interface contact and FRET mechanism greatly improved the generation, transmission, and separation efficiency of carriers photogenerated within the photocatalyst. FTIR test was applied to analyze the photocatalytic CO reduction process. C isotope tracer test confirmed that the carbon source of CO and CH was the CO molecules in the photoreduction process rather than the decomposition of catalyst or TEOA. A potential enhanced photocatalytic mechanism has been discussed in total.
高效的电子传输是CO光还原过程中的重要一步。本文通过溶剂热、自组装和水热还原过程成功制备了一种具有荧光共振能量转移（FRET）机制的多界面接触InS/Au/还原氧化石墨烯（rGO）光催化剂。光催化CO还原实验表明，InS/Au/rGO（IAr-3）复合材料表现出优异的光还原性能和光催化稳定性。以IAr-3为催化剂进行光还原过程后获得的CO和CH产量分别比纯InS高约4倍和6倍。光电化学分析表明，多界面接触和FRET机制极大地提高了光催化剂内光生载流子的产生、传输和分离效率。应用FTIR测试分析光催化CO还原过程。C同位素示踪测试证实，CO和CH的碳源是光还原过程中的CO分子，而不是催化剂或TEOA的分解产物。本文全面讨论了一种潜在的增强光催化机制。
