Sun Manying, Zhu Chuanwei, Wei Su, Chen Liuyun, Ji Hongbing, Su Tongming, Qin Zuzeng
Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Fine Chemical Industry Research Institute, Sun Yat-sen University, Guangzhou 510275, China.
Materials (Basel). 2023 Oct 12;16(20):6665. doi: 10.3390/ma16206665.
Photocatalytic CO reduction is a tactic for solving the environmental pollution caused by greenhouse gases. Herein, NHHPO was added as a phosphorus source in the process of the hydrothermal treatment of melamine for the first time, and phosphorus-doped hollow tubular g-CN (x-P-HCN) was fabricated and used for photocatalytic CO reduction. Here, 1.0-P-HCN exhibited the largest CO production rate of 9.00 μmol·g·h, which was 10.22 times higher than that of bulk g-CN. After doping with phosphorus, the light absorption range, the CO adsorption capacity, and the specific surface area of the 1.0-P-HCN sample were greatly improved. In addition, the separation of photogenerated electron-hole pairs was enhanced. Furthermore, the phosphorus-doped g-CN effectively activated the CO adsorbed on the surface of phosphorus-doped g-CN photocatalysts, which greatly enhanced the CO production rate of photocatalytic CO reduction over that of g-CN.
光催化CO还原是解决温室气体造成的环境污染的一种策略。在此，首次在三聚氰胺水热处理过程中添加NHHPO作为磷源，制备了磷掺杂空心管状g-CN（x-P-HCN）并用于光催化CO还原。在此，1.0-P-HCN表现出最大的CO产率，为9.00 μmol·g·h，比块状g-CN高10.22倍。磷掺杂后，1.0-P-HCN样品的光吸收范围、CO吸附容量和比表面积都有很大提高。此外，光生电子-空穴对的分离得到增强。此外，磷掺杂的g-CN有效地活化了吸附在磷掺杂g-CN光催化剂表面的CO，这大大提高了光催化CO还原的CO产率，超过了g-CN。
