Solvent-assisted synthesis of porous g-C3N4 with efficient visible-light photocatalytic performance for NO removal

doi:10.1016/S1872-2067(16)62585-8

Chinese Journal of Catalysis ›› 2017, Vol. 38 ›› Issue (2): 372-378.DOI: 10.1016/S1872-2067(16)62585-8

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Solvent-assisted synthesis of porous g-C₃N₄ with efficient visible-light photocatalytic performance for NO removal

Wendong Zhang^a,b, Zaiwang Zhao^c, Fan Dong^c, Yuxin Zhang^a

a College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;
b Department of Scientific Research Management, Chongqing Normal University, Chongqing 401331, China;
c Chongqing Key Laboratory of Catalysis and Functional Organic Molecules, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China

Received:2016-09-30 Revised:2016-10-28 Online:2017-02-18 Published:2017-03-14
Contact: 10.1016/S1872-2067(16)62585-8
Supported by:
This work was supported by the China Postdoctoral Science Foundation Funded Project (2016M592642), Project from Chongqing Education Commission (KJ1600305), Chongqing Basic Science and Advanced Technology Research (cstc2016jcyjAX0003), the Start-up Foundation for Doctors of Chongqing Normal University (15XLB010, 15XLB014), the National Natural Science Foundation of China (51478070, 51108487) and the Innovative Research Team of Chongqing (CXTDG201602014).

Abstract

Abstract:

Graphitic carbon nitride (g-C₃N₄) with efficient photocatalytic activity was synthesized through thermal polymerization of thiourea with the addition of water (CN-W) or ethanol (CN-E) at 550℃ for 2 h. The physicochemical properties of the g-C₃N₄ were investigated by X-ray diffraction, transmission electron microscopy, ultraviolet-visible spectroscopy, photoluminescence spectroscopy, diffuse-reflection spectroscopy, BET and BJH surface area characterization, and elemental analysis. The carbon content was found to have self-doped into the g-C₃N₄ matrix during the thermal polymerization of thiourea and ethanol. CN-W and CN-E showed considerably enhanced visible-light photocatalytic activity, with NO removal percentages of 37.2% and 48.3%, respectively. Compared with pure g-C₃N₄, both the short and long lifetimes of the charge carriers in CN-W and CN-E were found to be prolonged. The mechanism of improved visible-light photocatalytic activity was deduced. The present work may provide a facile route to optimize the microstructure of g-C₃N₄ photocatalysts for high-performance environmental and energy applications.

Key words: Solvent-assisted, Graphitic carbon nitride, Visible light, Photocatalytic performance, Nitrogen oxide removal

Wendong Zhang, Zaiwang Zhao, Fan Dong, Yuxin Zhang. Solvent-assisted synthesis of porous g-C₃N₄ with efficient visible-light photocatalytic performance for NO removal[J]. Chinese Journal of Catalysis, 2017, 38(2): 372-378.

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Solvent-assisted synthesis of porous g-C₃N₄ with efficient visible-light photocatalytic performance for NO removal

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