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Acta Phys. Chim. Sin.  2015, Vol. 31 Issue (10): 1932-1938    DOI: 10.3866/PKU.WHXB201509064
Preparation and Characterization of GO/Ag3PO4 Composite Photocatalyst and Its Visible Light Photocatalytic Performance
YU Chang-Lin1, WEI Long-Fu1,2, LI Jia-De1, HE Hong-Bo1, FANG Wen1, ZHOU Wan-Qin1
1 School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P. R. China;
2 State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, P. R. China
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Graphene oxide (GO) was fabricated from graphite powder by Hummers oxidation method and then, under ultrasonic irradiation, a series of GO/Ag3PO4 composite photocatalysts (4% (w, mass fraction) GO/Ag3PO4, 8% GO/Ag3PO4, 16% GO/Ag3PO4, 32% GO/Ag3PO4) were synthesized by a facile liquid deposition process. The products were characterized by N2-physical adsorption, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectra, Fourier transform infrared (FT-IR) spectroscopg, and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). The effect of GO content on the photocatalytic activity of Ag3PO4 was evaluated by photocatalytic degradation of methyl orange (MO) under visible light irradiation. The results show that GO can be easily dispersed into Ag3PO4, producing a well-connected GO/Ag3PO4 composite. Coupling of GO largely enhanced the surface area of the catalyst and the adsorption of MO. At the optimal GO content (16%), the degradation rate of MO over GO/Ag3PO4 was 83% after 120 min of light irradiation, exhibiting 7.5 times higher activity than that of pure Ag3PO4. The increase in photocatalytic activity and stability can be mainly attributed to the coupling of GO, which increased the surface area and suppressed the recombination rate of electron-hole (e-/h+) pairs and generated greater numbers of active free radicals.

Key wordsGraphene oxide      Ag3PO4      Coupling      Photocatalytic activity      Methyl orange      Active free radical     
Received: 25 June 2015      Published: 06 September 2015
MSC2000:  O643  

The project was supported by the National Natural Science Foundation of China (21067004, 21263005, 21567008), Young Science and Technology Project of Jiangxi Provincial Natural Science Foundation, China (20133BAB21003), Landing Project of Science and Technology of Colleges and Universities in Jiangxi Province, China (KJLD14046), Young Scientist Training Project of Jiangxi Province, China (20122BCB23015), and Yuan Hang Gong Cheng Project of Jiangxi Province, China.

Corresponding Authors: YU Chang-Lin     E-mail:
Cite this article:

YU Chang-Lin, WEI Long-Fu, LI Jia-De, HE Hong-Bo, FANG Wen, ZHOU Wan-Qin. Preparation and Characterization of GO/Ag3PO4 Composite Photocatalyst and Its Visible Light Photocatalytic Performance. Acta Phys. Chim. Sin., 2015, 31(10): 1932-1938.

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