The facile synthesis and enhanced photocatalytic properties of ZnO@ZnS modified with Ag0 via in-situ ion exchange

Publication date: Available online 4 February 2020Source: Colloids and Surfaces A: Physicochemical and Engineering AspectsAuthor(s): Yufeng Yao, Yongcai Zhang, Ming Shen, Weizheng Li, Weiwei XiaAbstractA novel flower-like nonylresorcinol calix[4]arene (NRCA)-coated ZnO@ZnS@Ag core@shell heterostuctures were fabricated via in-situ ion exchange approach by controlling the addition order of the reagents. The synthesis of ZnO@ZnS attached with metallic Ag via twice ion exchange method combined with in-situ reduction has not been previously reported. The synthesized samples had higher absorption in the visible light region. The roughness of the surface increased due to the uniform distribution of ion exchange-synthesized silver nanoparticles on the surface of the samples. Meanwhile, the photocatalytic ability of the NRCA-coated ZnO@ZnS@Ag core@shell heterostuctures improved for the degradation of rhodamine B (RhB). Notably, the heterostucture sample containing 8.34 mol% Ag (denoted as ZA3) exhibited good stability. Improvements in the degradation performance could be ascribed to the enhanced charge separation in the type II ZnO@ZnS heterostructure with Ag0.Graphical abstract

Source: Colloids and Surfaces A: Physicochemical and Engineering Aspects - February 5, 2020 Category: Chemistry Source Type: research