Ag3PO4/reduced graphite oxide sheets nanocomposites with highly enhanced visible light photocatalytic activity and stability

Authors: Pengyu Dong, Yuhua Wang, Baocheng Cao, Shuangyu Xin, Linna Guo, Jia Zhang, Fenghua Li

Abstract:
A series of Ag₃PO₄ and reduced graphite oxide sheets (RGOs) nanocomposites have been fabricated by a facile chemical precipitation approach in N,N-dimethylformamide (DMF) solvent without any hard/soft templates. The as-prepared Ag₃PO₄/RGOs composites were characterized by X-ray diffraction pattern (XRD), Fourier transform infrared spectra (FTIR), Raman spectroscopy, field emission scanning electron microscopy (SEM), transmission electron microscopy (TEM), and ultraviolet–visible (UV–vis) diffuse reflectance spectroscopy (DRS). It is found that the nano-sized Ag₃PO₄ particles are deposited on the surfaces of RGOs. The Ag₃PO₄/RGOs nanocomposites exhibit enhanced photocatalytic activity for the photodegradation of organic methyl orange (MO) and methylene blue (MB) under visible lightirradiation. The photocatalytic rate of Ag₃PO₄/2.1 wt% RGOs nanocomposite is 3 and 2 times of that of pure Ag₃PO₄ nanoparticles for the degradation of MO and MB, respectively. Furthermore,the photocatalytic and structural stability of Ag₃PO₄ is greatly enhanced. It is suggested that RGOs can be used as protective coatings that partially inhibit the photocorrosion of Ag₃PO₄. Overall, this work could provide a new approach to the improvement not only in the photocatalytic activity but also the stability of photocorrosion catalysts.

Keywords:
Reduced graphite oxide sheets
Silver orthophosphate
Nanocomposite
Photocatalysis
Stability

Published in: Applied Catalysis B: Environmental (Volumes 132–133, Pages 1-552, 27 March 2013)

Publisher: Elsevier  

ISSN Information: 0926-3373

Ag3PO4/reduced graphite oxide sheets nanocomposites with highly enhanced visible light photocatalytic activity and stability

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