School of Materials Science and Engineering, Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, People's Republic of China.
Nanotechnology. 2019 Nov 22;30(47):475704. doi: 10.1088/1361-6528/ab3d22. Epub 2019 Aug 20.
A novel direct Z-scheme ZnCdS/FeWO (ZCS/FW) photocatalyst was prepared by a facile calcination method. The photocatalytic performance was investigated by photodegradation rhodamine B (RhB) and photocatalytic production hydrogen (H) under visible light irradiation. Compared with the pure ZCS, the ZCS/FW composites show considerably improved photocatalytic activity for degradation RhB and production H. Noticeably, the ZCS/FW with 7 wt% of FW exhibits optimal photocatalytic activity with the H evolution rate of 34.6 mmol g h and photodegradation of about 98% of RhB solution (10 mg l) in 60 min. These outstanding photocatalytic performances were found to be ascribed to the formation of direct Z-scheme heterojunction, resulting in effective separation and transfer of photogenerated charge carriers. Moreover, active species trapping experiments further demonstrate the electrons transfer followed Z-scheme system, and the photocatalytic mechanism was proposed.
一种新型的直接 Z 型 ZnCdS/FeWO（ZCS/FW）光催化剂通过简便的煅烧方法制备。通过可见光照射下罗丹明 B（RhB）的光降解和光催化产氢（H）来研究光催化性能。与纯 ZCS 相比，ZCS/FW 复合材料在降解 RhB 和产 H 方面表现出相当大的提高的光催化活性。值得注意的是，FW 含量为 7wt%的 ZCS/FW 具有最佳的光催化活性，其 H 释放速率为 34.6mmol g h，在 60min 内可将约 98%的 RhB 溶液（10mg l）光降解。这些优异的光催化性能归因于直接 Z 型异质结的形成，从而有效分离和转移光生载流子。此外，活性物种捕获实验进一步证明了电子遵循 Z 型体系的转移，提出了光催化机制。
