Chen Zhangjing, Zhu Xueteng, Xiong Jinyan, Wen Zhipan, Cheng Gang
School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Donghu New & High Technology Development Zone, Wuhan 430205, China.
College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, China.
Materials (Basel). 2023 Jan 19;16(3):960. doi: 10.3390/ma16030960.
Photocatalytic CO reduction is a promising technology for reaching the aim of "carbon peaking and carbon neutrality", and it is crucial to design efficient photocatalysts with a rational surface and interface tailoring. Considering that amine modification on the surface of the photocatalyst could offer a favorable impact on the adsorption and activation of CO, in this work, amine-modified brookite TiO nanorods (NH-B-TiO) coupled with CuS (NH-B-TiO-CuS) were effectively fabricated via a facile refluxing method. The formation of a p-n junction at the interface between the NH-B-TiO and the CuS could facilitate the separation and transfer of photogenerated carriers. Consequently, under light irradiation for 4 h, when the CuS content is 16%, the maximum performance for conversion of CO to CH reaches at a rate of 3.34 μmol g h in the NH-B-TiO-CuS composite, which is approximately 4 times greater than that of pure NH-B-TiO. It is hoped that this work could deliver an approach to construct an amine-enriched p-n junction for efficient CO photoreduction.
光催化CO还原是实现“碳达峰、碳中和”目标的一项很有前景的技术，设计具有合理表面和界面剪裁的高效光催化剂至关重要。考虑到光催化剂表面的胺修饰对CO的吸附和活化可能有有利影响，在本工作中，通过简便的回流法有效制备了与CuS耦合的胺修饰板钛矿TiO纳米棒（NH-B-TiO）（NH-B-TiO-CuS）。NH-B-TiO与CuS之间界面处p-n结的形成可促进光生载流子的分离和转移。因此，在光照4小时的条件下，当CuS含量为16%时，NH-B-TiO-CuS复合材料中CO转化为CH的最大性能达到3.34 μmol g-1 h-1，约为纯NH-B-TiO的4倍。希望这项工作能够提供一种构建富含胺的p-n结以实现高效CO光还原的方法。
