NDLI: Facile fabrication of 3D flower-like heterostructured g-C3N4/SnS2 composite with efficient photocatalytic activity under visible light

Content Provider	Royal Society of Chemistry (RSC)
Author	Sun, Meng Yan, Qing Wei, Qin Li, Mengmeng Du, Bin Wei, Dong Yan, Tao Wang, Zhongpeng
Copyright Year	2014
Abstract	3D flower-like heterostructured g-C3N4/SnS2 composites were fabricated by a facile solvothermal method. The obtained g-C3N4/SnS2 composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), N2 sorption–desorption, and ultraviolet-visible diffuse reflection spectroscopy (DRS). The SEM results showed that the SnS2 nanoflakes assembled into hierarchical flowers when g-C3N4 was introduced into the system. The elemental mapping images revealed that g-C3N4 and SnS2 nanoflakes uniformly assembled together to form the hierarchical flowers. The HRTEM image showed clear heterojunction structure at the interfaces between g-C3N4 and SnS2 nanoflakes. The DRS characterization showed that the light absorption exhibited regular red-shifts upon the increase of the g-C3N4/SnS2 mass ratio. In the photocatalytic reduction of aqueous Cr(VI) under visible-light irradiation, g-C3N4/SnS2 composites exhibited enhanced activities, which were much higher than that for pure SnS2, SnS2/TiO2, and PM-g-C3N4/SnS2 (a physical mixture of g-C3N4 and SnS2). The photoelectrochemical measurement confirmed that the separation efficiency of electron–hole pairs was greatly improved for the formation of heterojunction structure. It was also shown that the formate or hydrogen ions added systematically accelerated the photo-reduction rates of Cr(VI). A possible photocatalytic mechanism for g-C3N4/SnS2 composites was proposed.
Starting Page	31019
Ending Page	31027
Page Count	9
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	4
Issue Number	59
Journal	RSC Advances
DOI	10.1039/c4ra03843f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	X-ray crystallography Spectroscopy Diffuse reflection Hydrogen High-resolution transmission electron microscopy Photoelectrochemical process Formate Scanning electron microscope Three-dimensional space Heterojunction
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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