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Enhanced visible light photocatalytic activity for g-C3N4/SnO2:Sb composites induced by Sb doping

Gao, Wenyu, Zhao, Yang, Mao, Zhiyong, Bi, Dasen, Chen, Jingjing, Wang, Dajian
Journal of materials science 2018 v.53 no.13 pp. 9473-9485
Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, absorption, antimony, carbon nitride, electrochemistry, graphene, hot water treatment, nanoparticles, nanosheets, photocatalysis, photocatalysts, scanning electron microscopy, tin dioxide, transmission electron microscopy
In this paper, g-C₃N₄/SnO₂:Sb composite photocatalysts were fabricated by in situ loading Sb-doped SnO₂ (SnO₂:Sb) nanoparticles on graphitic carbon nitride (g-C₃N₄) nanosheets via a facile hydrothermal method. The synthesized g-C₃N₄/SnO₂:Sb composites delivered enhanced visible light photocatalytic performance for degradation of rhodamine B in comparison with g-C₃N₄/SnO₂ composites without doping Sb. Various techniques including XRD, SEM, TEM, FTIR, XPS, PL and electrochemical method were employed to demonstrate the successful fabrication of g-C₃N₄/SnO₂:Sb composite and to investigate the enhanced mechanism of photocatalytic activity. The improvement of visible light absorption and the promotion of separation efficiency and interfacial transfer of photogenerated carriers induced by Sb doping were responsible for the enhancement of photocatalytic activity. This study provides a simple and convenient method to synthesize a visible light responsive catalyst with promising performance for the potential application in environmental protection.