Synthesis and Photocatalytic Degradation Performance of g-C₃N₄/ CoAPO-5/rGO Ternary Composite

Abstract:

Graphitic carbon nitride is a promising photocatalyst for environmental purification, but the photocatalytic performance is limited significantly due to its narrow visible-light adsorption and high photo-reduced electron-hole recombination rate. This work developed a novel way to overcome the two defects and obtained obvious effect. CoAPO-5 was used to broaden visible-light adsorption range by conducting g-C₃N₄/CoAPO-5 binary composite. In further, rGO was integrated into the binary system to form novel ternary composite. rGO performs as a electron mediator, which can inhibit photo-reduced electron-hole recombination efficiently. The samples were characterized by XRD, SEM, PL, IR and DRS. The photocatalytic performances for degrading RhB (10mg/L) indicated that g-C₃N₄/CoAPO-5/rGO have much higher activity than g-C₃N₄/CoAPO-5 because of synergistic effect. When the doping content of rGO in g-C₃N₄/CoAPO-5 was 0.5%, the degradation efficiency was improved by 14%.

• Periodical: Solid State Phenomena (Volume 281)
• Pages: 848-853
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.281.848
• Online since: August 2018
• Authors: Ling Fang Qiu, Xiao Bin Qiu, Zhi Wei Zhou, Shu Wang Duo*
• Keywords: CoAPO-5, Composites, g-C₃N₄, Photocatalytic Degradation, rGO

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