Few-layered WS2 nanosheets onto 1D CdS@ZnCdS as efficient visible-light photocatalyst for hydrogen evolution. Issue 16 (November 2020)

• Record Type: Journal Article
• Authors: Zhou, Xiaopeng; Zhang, Ning; Yin, Linxin; Zhao, Yafei; Zhang, Bing
• Is Part Of: Ceramics international. Volume 46:Issue 16(2020)Part A
• Page Start: 26100
• Page End: 26108
• Publication Date: 2020-11
• Subjects: WS2/CdS@ZnCdS photocatalysts -- Few-layered WS2 -- Core-shell structure -- Hydrogen evolution -- Electrostatic adsorption; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.07.105
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Exploiting highly efficient and non-expensive visible-light photocatalysts is a huge challenge for H2 photocatalytic production. Here we synthesized an efficient non-precious metal photocatalyst WS2 /CdS@ZnCdS (WS2 /CdS@ZCS) consisting of few-layered WS2 attached on the core/shell structure of CdS@ZnCdS (CdS@ZCS) via three-step hydrothermal and electrostatic adsorption methods, in which the morphology and structure of the components were regulated independently. The optimum photocatalytic H2 evolution rate of 8 wt% WS2 /CdS@ZCS is 34860 μmol h −1 g −1, which is almost 5.2 times as high as that of pure CdS nanorods (6730 μmol h −1 g −1 ) and superior to most previously reported CdS-based photocatalysts. Moreover, it can maintain 91% of its initial hydrogen evolution rate after 20 hours photocatalytic experiment, indicating WS2 /CdS@ZCS is very stable. A possible mechanism of H2 generation on WS2 /CdS@ZCS photocatalyst is also proposed. It is thought that this work may provide a promising way to design nanosheets/1D core@shell heterostructured photocatalysts for high-performance and steady H2 production.