Engineering of 2D/2D MoS2/CdxZn1−xS Photocatalyst for Solar H2 Evolution Coupled with Degradation of Plastic in Alkaline Solution. Issue 6 (18th December 2020)

• Record Type: Journal Article
• Authors: Li, Yiqun; Wan, Shipeng; Lin, Cheng; Gao, Yujie; Lu, Yuan; Wang, Luyang; Zhang, Kan
• Is Part Of: Solar RRL. Volume 5:Issue 6(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-12-18
• Subjects: H2 evolution -- MoS2/CdxZn1−xS -- plastic degradation -- redox potential; Solar energy -- Periodicals; Photovoltaic power generation -- Periodicals; Solar energy -- Research -- Periodicals; Photovoltaic power generation -- Research -- Periodicals; Periodicals; 333.7923
• DOI: 10.1002/solr.202000427
• Languages: English
• ISSNs: 2367-198X

Abstract

Abstract : Sufficiently utilizing photogenerated electron/hole pairs for a coupled redox enables green, sustainable, and low‐cost photocatalysis. Herein, a series of MoS2 /Cd x Zn1− x S photocatalysts with uniform 2D/2D structure are reported for solar water–reductive H2 products coupled with the degradation of polyethylene terephthalate (PET) plastic. The MoS2 /Cd0.5 Zn0.5 S heterojunction with a loading mass of 4.3 wt% MoS2 exhibits the best H2 evolution rate of 15.90 mmol g −1 h −1 in an aqueous solution due to its appropriate redox ability, great light absorption, and carrier separation abilities. Then, the oxidation products of PET are analyzed by 1 H‐NMR spectroscopy, which demonstrates the PET being efficiently degraded to molecule compounds, such as formate and acetate. The work provides a feasible solution to the problem of plastic pollution and meets the demand for sustainable clean energy simultaneously. Abstract : MoS2 /Cd x Zn1− x S heterojunctions with tunable bandgap and band structure enable an appropriate redox ability, great light absorption, and carrier separation abilities. An optimal 4.3 wt% MoS2 /Cd0.5 Zn0.5 S presents the best photocatalytic performance of simultaneous H2 evolution and plastic degradation in redesigned redox coupling, ascribing to the synergetic effects in terms of charge separation efficiency, light absorption capability, and suitable oxidation potential.