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

Abstract 2D/2D heterojunction photocatalyst of CdIn 2 S 4 on nitrogen doped reduced graphene (N-rGO) was fabricated by in situ hydrothermal method. It is noticeable that the flower-like CdIn 2 S 4 photocatalyst composed of film is controlled by the temperature of synthesis process. When CdIn 2 S 4 photocatalyst load on N-rGO, irregular film N-rGO functions as support to disperse the CdIn 2 S 4 , forming the 2D/2D interfacial structure, which is confirmed by SEM, TEM, 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 CdIn 2 S 4 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.