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Acta Phys. -Chim. Sin.  2015, Vol. 31 Issue (6): 1145-1152    DOI: 10.3866/PKU.WHXB201504015
CATALYSIS AND SURFACE SCIENCE     
Synthesis of g-C3N4/BiVO4 Nanocomposite Photocatalyst and Its Application in Photocatalytic Reduction of CO2
HUANG Yan1,2, FU Min1, HE Tao2
1 Chongqing Key Laboratory of Catalysis and Functional Organic Molecules, College of Environmental and Biological Engineering, Chongqing Technology and Business University, Chongqing 400067, P. R. China;
2 CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, P. R. China
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Abstract  

A visible-light-active graphitic-like carbon nitride (g-C3N4)/BiVO4 nanocomposite photocatalyst was synthesized using a facile ultrasonic dispersion method. The nanocomposite was characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet-visible (UV-Vis) spectroscopy, photoluminescence (PL) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, and photocurrent response measurements. The photocatalytic activity in the photoreduction of CO2 under visible-light irradiation (λ>420 nm) was determined. The g-C3N4/BiVO4 catalyst containing 40% (w) g-C3N4 showed the highest photocatalytic activity; it was almost twice that of g-C3N4 nanosheets and four times that of BiVO4. The enhanced photocatalytic activity is attributed to the formation of heterostructures at the g-C3N4/BiVO4 interface and appropriate alignment of the energy levels between them, which can facilitate separation of photogenerated electrons and holes.



Key wordsPhotocatalysis      CO2 conversion      Methane      Carbon nitride      Bismuth vanadate     
Received: 09 February 2015      Published: 01 April 2015
MSC2000:  O643  
Fund:  

The project was supported by the Ministry of Science and Technology of China (2015DFG62610).

Corresponding Authors: FU Min, HE Tao     E-mail: fumin1022@126.com;het@nanoctr.cn
Cite this article:

HUANG Yan, FU Min, HE Tao. Synthesis of g-C3N4/BiVO4 Nanocomposite Photocatalyst and Its Application in Photocatalytic Reduction of CO2. Acta Phys. -Chim. Sin., 2015, 31(6): 1145-1152.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB201504015     OR     http://www.whxb.pku.edu.cn/Y2015/V31/I6/1145

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