One-pot-solid preparation of novel three-dimensional FexS1-x/g-C3N4 heterostructures for efficient photocatalytic mixed-pollutants removal. Issue 14 (1st October 2020)

• Record Type: Journal Article
• Authors: Li, Chenxi; Guo, Yadan; Yang, Fan; Gong, Zhiheng; Zhang, Bingcong; Guo, Yaoping
• Is Part Of: Ceramics international. Volume 46:Issue 14(2020)
• Page Start: 22683
• Page End: 22691
• Publication Date: 2020-10-01
• Subjects: FexS1-x -- g-C3N4 -- Heterostructures -- Simultaneous photocatalytic; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.06.031
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In order to overcome the problem of low photocatalytic rate of g-C3 N4, the 3D Fex S1-x /g-C3 N4 heterojunction was prepared via a simple one-pot solid method. The X-Ray Diffraction (XRD) and scanning electron microscope (SEM) results demonstrated that the Fex S1-x /g-C3 N4 heterojunction was established and a g-C3 N4 nanosheet was tightly bound to Fex S1-x . Compared with g-C3 N4 samples, Fex S1-x coupling resulted in substantial enhancement of visible light absorption, moreover, the bandwidth of heterojunction was also expanded. In addition to effectively degrading RhB and reducing Cr(VI), the redox performance of Fex S1-x /g-C3 N4 was also increased in the Cr(VI)/RhB mixed system. Based on a variety of experimental results, the enhanced synergistic photocatalytic activity of the 3D Fex S1-x /g-C3 N4 heterojunction was attributed to enhancement of the separation of e - and h + in FeS2, which resulted from the effective conversion of FeS into FeS2 under UV-light irradiation. The type II heterojunction structure that was produced via one-pot solid fabrication also inhibited the recombination of electron/hole pairs. Fex S1-x doping and heterojunction building improve the photocatalysis capacity of g-C3 N4 and broaden the visible-light response of pure g-C3 N4 .