Preparation and Visible Light Photocatalytic Property of g-C3N4/MoS2 Nanosheets/GO Ternary Composite Photocatalyst

doi:10.15541/jim20170263

Abstract

Abstract:

The g-C₃N₄/MoS₂ nanosheets/graphene oxide (GO) ternary composite photocatalyst was successfully prepared by a ball milling method. Its structure, morphology and optical property were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), UV-Vis absorption spectroscopy (DRS), and photoluminescence spectroscopy (PL), respectively. The results indicated that the heterogeneous structure of MoS₂ nanosheets and g-C₃N₄ were formed on the surface of GO. The photocatalytic activity of the photocatalyst was evaluated by degradation of organic Rhodamine B (RhB) under visible light irradiation. The ternary composite photocatalyst could degrade 96% of RhB within 120 min, about 3, 2.1 and 2.8 times higher than that of the g-C₃N₄, g-C₃N₄/MoS₂ composite and g-C₃N₄/GO composite. Based on the experimental results and the band structure, a possible charge transfer mechanism of ternary composite photocatalyst was proposed.

Key words: carbon nitride, molybdenum disulfide nanosheets, graphene oxide, photocatalysis

CLC Number:

O643

YAN Xin, LU Jin-Hua, HUI Xiao-Yan, YAN Cong-Xiang, GAO Qiang, SUN Guo-Dong. Preparation and Visible Light Photocatalytic Property of g-C₃N₄/MoS₂ Nanosheets/GO Ternary Composite Photocatalyst[J]. Journal of Inorganic Materials, 2018, 33(5): 515-520.

Figures/Tables 8

Fig. 1 XRD patterns of GO, MoS2 nanosheets, g-C3N4, g-C3N4/GO, g-C3N4/MoS2 nanosheets, g-C3N4/MoS2 nanosheets/ GO photocatalyst

Fig. 2 TEM (a) and HRTEM (b) images of g-C3N4/MoS2 nanosheets/GO ternary composite photocatalyst

Fig. 3 UV-Vis absorption spectra of g-C3N4, g-C3N4/GO, g- C3N4/MoS2 nanosheets, g-C3N4/MoS2 nanosheets/GO photocatalyst

Fig. 4 PL spectra of g-C3N4, g-C3N4/GO, g-C3N4/MoS2 nanosheets, g-C3N4/MoS2 nanosheets/GO photocatalyst

Fig. 5 Degradation curves of RhB by g-C3N4, g-C3N4/GO, g- C3N4/MoS2 nanosheets, g-C3N4/MoS2 nanosheets/GO photocatalyst

Fig. 6 Kinetic plots of photocatalytic degradation of RhB by g-C3N4, g-C3N4/GO, g-C3N4/MoS2 nanosheets, g-C3N4/MoS2 nanosheets/GO photocatalyst

Fig. 7 TOC removal efficiencies of the degraded RhB solution over different samples under visible light irradiation for 120 min

Fig. 8 Schematic diagram of the photocatalytic degradation and charge transfer mechanism in the g-C3N4/MoS2 nanosheets/GO photocatalyst

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Preparation and Visible Light Photocatalytic Property of g-C₃N₄/MoS₂ Nanosheets/GO Ternary Composite Photocatalyst

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