Enhanced the Efficiency of Photocatalytic Degradation of Methylene Blue by Construction of Z-Scheme g-C3N4/BiVO4 Heterojunction

Coatings

Minjin Li¹  Cheng Liu¹  Zhiyong Zhang¹  Qiaoping Liu¹  Xiong Zhang¹  Fuchun Zhang² 

[1] School of Information Science & Technology, Northwest University, Xi’an 710127, China;School of Physics and Electronic Information, Yan’an University, Yan’an 716000, China;

关键词: g-C₃N₄/BiVO₄;    photocatalysis;    heterojunction;    Z-scheme;   

DOI  :  10.3390/coatings11091027

来源: DOAJ

【 摘 要 】

Both non-metallic g-C₃N₄ and BiVO₄ are novel photocatalysts responsive to visible light, but their low charge separation efficiency restricts their inconspicuous photocatalytic activity. In this paper, direct Z-type g-C₃N₄/BiVO₄ photocatalyst was constructed by calcination and hydrothermal for the degradation of methylene blue. The existence of g-C₃N₄/BiVO₄ heterojunction was confirmed by the detailed study of its chemical structure and morphology by various characterization methods, such as X-ray diffraction (XRD), Scanning electron microscope (SEM), and X-ray photoelectron spectroscopy (XPS). The evaluation of photocatalytic performance showed that the MB degradation performance of 1.0-CN/BVO was significantly enhanced, which was 4.528 times and 2.387 times higher than pristine BiVO₄ and g-C₃N₄, respectively, which was mainly due to the enhanced light capture ability and effective electron transfer in the photocatalytic reaction. The 1.0-CN/BVO composite exhibited extremely catalytic stability and recyclability.

【 授权许可】

Unknown