Hollow cubic CdS@CoS/WS2 dual S-scheme heterojunction superstructure toward optimized photothermal–photocatalytic performance. Issue 48 (1st December 2022)

• Record Type: Journal Article
• Authors: Kong, Weifeng; Xing, Zipeng; Zhang, Hang; Fang, Bin; Cui, Yongqian; Li, Zhenzi; Chen, Peng; Zhou, Wei
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 48(2022)
• Page Start: 18164
• Page End: 18173
• Publication Date: 2022-12-01
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2tc03943e
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : Hollow cubic CdS@CoS/WS2 dual S-scheme heterojunction superstructures with a full spectral response showing good photothermal–photocatalytic properties are fabricated using a simple sulfidation and hydrothermal method. Abstract : A hollow polyhedral structure can effectively capture light and facilitate carrier separation, thus enhancing photocatalytic performance. Herein, hollow cubic CdS@CoS/WS2 dual S-scheme heterojunction superstructure photocatalysts are fabricated using a simple sulfidation and hydrothermal method. CdS@CoS/WS2 with a band gap of 1.59 eV and a relatively narrow band gap broadens the photoreaction to the near-infrared region and shows a good photothermal effect, which can promote photocatalytic reactions. It shows a relative specific surface area of 91.58 m 2 g −1, which provides abundant surface-active sites to enhance the photocatalytic reaction. Under light conditions, the photocatalytic degradation ratios of CdS@CoS/WS2 for tetracycline and bisphenol A are up to 98.9 and 99.1%, and the hydrogen evolution efficiency is also up to 10.62 mmol h −1 g −1 . The enhanced photothermal–photocatalytic performance could be due to the formation of a dual S-scheme heterojunction superstructure that facilitates space charge separation, a narrow band gap and a mesoporous hollow structure promoting solar light utilization, providing abundant surface-active sites and enhanced mass transfer. This simple strategy provides a new idea for the construction of high-performance hollow superstructure photocatalysts.