Zhu Haifeng, Ding Renjie, Dou Xinle, Zhou Jiashun, Luo Huihua, Duan Lijie, Zhang Yaping, Yu Lianqing
School of Science, China University of Petroleum, Qingdao 266580, China.
College of Materials Science and Engineering, China University of Petroleum, Qingdao 266580, China.
Materials (Basel). 2022 Aug 25;15(17):5861. doi: 10.3390/ma15175861.
A novel co-catalyst system under visible-light irradiation was constructed using high-purity metal and alloy mesh and a MnCdS photocatalyst with a narrow band gap (1.91 eV) prepared by hydrothermal synthesis. The hydrogen production rate of MnCdS changed from 2.21 to 6.63 mmol·(g·h) with the amount of thioacetamide, which was used as the sulphur source. The introduction of Ag, Mo, Ni, Cu, and Cu-Ni alloy meshes efficiently improved the H production rate of the co-catalyst system, especially for the Ni mesh. The improvement can reach an approximately six times greater production, with the highest H production rate being 37.65 mmol·(g·h). The results showed that some bulk non-noble metal meshes can act as good or better than some noble metal nanoparticles deposited on the main photocatalyst for H evolution due to the promotion of photoinduced electron transfer, increase in redox reaction sites, and prevention of the recombination of carriers.
采用高纯度金属及合金网与通过水热合成制备的窄带隙（1.91 eV）的MnCdS光催化剂，构建了一种新型的可见光照射下的助催化剂体系。以硫代乙酰胺作为硫源，MnCdS的产氢速率随其用量从2.21 mmol·(g·h)变化至6.63 mmol·(g·h)。Ag、Mo、Ni、Cu及Cu-Ni合金网的引入有效提高了助催化剂体系的产氢速率，特别是对于Ni网。产氢量提高可达约六倍，最高产氢速率为37.65 mmol·(g·h)。结果表明，一些块状非贵金属网由于促进了光生电子转移、增加了氧化还原反应位点以及防止了载流子复合，在析氢方面可作为比负载在主光催化剂上的一些贵金属纳米颗粒更好或与之相当的助催化剂。
