Fabricated 2D/2D CdIn2S4/N-rGO muti-heterostructure photocatalyst for enhanced photocatalytic activity

摘要

2D/2D heterojunction photocatalyst of CdIn2S4 on nitrogen doped reduced graphene (N-rGO) was fabricated by in situ hydrothermal method. It is noticeable that the flower-like CdIn2S4 photocatalyst composed of film is controlled by the temperature of synthesis process. When CdIn2S4 photocatalyst load on N-rGO, irregular film N-rGO functions as support to disperse the CdIn2S4, forming the 2D/2D interfacial structure, which is confirmed by SEM, TEM and HRTEM. When the mass fraction of N-rGO is 10%, the binary composite photocatalyst could photodegrade 80% 50 mg/L 2,4-dichlorophenol (2,4-DCP). That is because the heterojunction formed between CdIn2S4 and N-rGO promotes the electron transfer, especially the interfacial contact region. What's more, the N-rGO can efficiently accumulate the 2,4-DCP molecules because of its unique structure, bettering the contact rate between 2,4-DCP and the whole photocatalyst. The possible mechanism of photodegrading 2,4-DCP was discussed and investigated. This work highlights the synergistic effect, especially the harmony between charge transfer and active sites to benefit the photocatalytic performance. (C) 2019 Elsevier Ltd. All rights reserved.