Construction of direct Z-scheme system for enhanced visible light photocatalytic activity based on Zn0.1Cd0.9S/FeWO4 heterojunction. (9th September 2019)

• Record Type: Journal Article
• Authors: Tang, Yunxiang; Kong, Dezhi; Wang, Xiaotong; Ma, Yuxue; Su, Changhua; Pu, Xipeng; Geng, Yanling
• Is Part Of: Nanotechnology. Volume 30:Number 47(2019)
• Publication Date: 2019-09-09
• Subjects: direct Z-scheme -- photocatalytic -- visible light -- ZCS nanorods; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ab3d22
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: A novel direct Z-scheme Zn0.1 Cd0.9 S/FeWO4 (ZCS/FW) photocatalyst was prepared by a facile calcination method. The photocatalytic performance was investigated by photodegradation rhodamine B (RhB) and photocatalytic production hydrogen (H2 ) under visible light irradiation. Compared with the pure ZCS, the ZCS/FW composites show considerably improved photocatalytic activity for degradation RhB and production H2 . Noticeably, the ZCS/FW with 7 wt% of FW exhibits optimal photocatalytic activity with the H2 evolution rate of 34.6 mmol g −1 h −1 and photodegradation of about 98% of RhB solution (10 mg l −1 ) 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.