Engineering highly active Cd1−xZnxS nanopopcorns via zinc blende/wurtzite phase junctions for enhanced photocatalytic H2 evolution without a co-catalyst. Issue 12 (8th March 2021)

• Record Type: Journal Article
• Authors: Guo, Xiaosheng; Cheng, Chuchu; Xing, Fangshu; Huang, Caijin
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 12(2021)
• Page Start: 7913
• Page End: 7923
• Publication Date: 2021-03-08
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d0ta12600d
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : Cd1− x Zn x S nanopopcorns with ZB/WZ phase junctions for effectively enhanced visible-light photocatalytic H2 evolution without a co-catalyst. Abstract : Rational structure design of semiconductor photocatalysts is meaningful to enhance their sunlight-driven hydrogen-evolution performance. Herein, we present a facile approach to prepare Cd1− x Zn x S nanopopcorns with zinc blende/wurtzite phase junctions by using excess thioacetamide (TAA). The as-obtained Cd1− x Zn x S samples were used for visible-light photocatalytic H2 evolution without a co-catalyst. The H2 -evolution activity reaches 282.14 μmol h −1 mg −1, which is ca. 12 fold higher than that of Cd0.5 Zn0.5 S prepared with an equivalent dose of TAA. Meanwhile, an apparent quantum yield of 64.4% at 420 nm was achieved. Results demonstrated that the Cd1− x Zn x S samples synthesized by using excess TAA improve light absorption and hydrophilicity, which is helpful for the photocatalytic reaction. Moreover, the existence of type-II ZB/WZ phase junctions promotes the separation and migration of photoinduced electron–hole pairs. This work provides a novel idea for the rational design of efficient Cd1− x Zn x S-based photocatalysts.