Construction of CuInS2@ZIF-8 nanocomposites with enhanced photocatalytic activity and durability. (April 2019)

• Record Type: Journal Article
• Authors: Liu, Aiping; Yu, Chao; Lin, Jing; Sun, Guanghui; Xu, Guohai; Huang, Yang; Liu, Zhenya; Tang, Chengchun
• Is Part Of: Materials research bulletin. Volume 112(2019)
• Page Start: 147
• Page End: 153
• Publication Date: 2019-04
• Subjects: Nanocomposites -- Semiconductors -- CuInS2@ZIF-8 -- Photocatalytic properties; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2018.12.020
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: CIS@ZIF-8 nanocomposites are synthesized by ZIF-8 in situ growing on the PVP-decorated CIS nanoparticles, and exhibit better catalytic efficiency and durability towards degradation of RhB than pure CIS nanoparticles. Highlights: A novel CuInS2 @ZIF-8 nanocomposites was prepared by covering ZIF-8 nanocrystals on the surfaces of CuInS2 nanospheres. PVP play a key role in inducing the nucleation of ZIF-8 on the surface of CuInS2. CuInS2 @ZIF-8 nanocomposites exhibit high photocatalytic activity and durability. The photocatalytic reaction mechanism of CuInS2 @ZIF-8 nanocomposites was proposed. Abstract: Inspired by the unique structure and wide applications of zeolitic imidazolate frameworks-8 (ZIF-8) and CuInS2 (CIS), considerable attention has focused on the combination of both materials. We herein report a facial method for the homogeneous decoration of ZIF-8 onto the surfaces of CuInS2 (CIS) nanoparticles coordinated by polyvinyl pyrrolidone (PVP) in methanol. It has been shown that the coordination of PVP plays a key role in inducing the nucleation of ZIF-8 on the surface of CIS nanoparticles because of the pyrrolidone rings (C = O) in PVP offering an improved affinity between CIS and Zn ions. Performing as a catalyst, the CIS@ZIF-8 nanocomposites not only exhibit high photocatalytic activity for the degradation of organic dye under UV light irradiation, but also largely maintain their catalytic efficiency after being recycled for five times compared with that of pure CIS nanoparticles.