首页|Insights into the enhanced photocatalytic activity of O-g-C3N4 coupled with SnO2 composites under visible light irradiation

Insights into the enhanced photocatalytic activity of O-g-C3N4 coupled with SnO2 composites under visible light irradiation

扫码查看
? 2022 Elsevier B.V.g-C3N4 (CN), a nonmetal semiconductor, shows tremendous potential for utilization in the field of photocatalysis owing to its physicochemical stability and good visible light response properties. In this study, the photocatalyst of O-g-C3N4 (OCN) coupled with SnO2 (SO) was synthesized and its photocatalytic performance was evaluated under simulated sunlight irradiation for rhodamine B (RhB) degradation and Cr(IV) reduction. The structure, morphology, and properties of the synthesized photocatalyst were investigated using X-ray diffraction, Brunauer–Emmett–Teller analysis, transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy, and an electrochemical system. The analysis results revealed that the 30-SO/OCN nanocomposite exhibited an excellent specific surface area; moreover, O atoms were doped into CN and a heterojunction was formed between SO and OCN. The 30-SO/OCN nanocomposites exhibited more than 2.52 and 1.73 times catalytic activity than 30-SO/CN nanocomposites toward RhB and Cr(IV) degradation, respectively. Based on radical scavenger experiments, h+ and e? were confirmed to be the main active species in the photocatalysis of 30-SO/OCN nanocomposites. The excellent photocatalytic activity of 30-SO/OCN nanocomposites was attributed to the special surface of OCN as well as the formation of a heterojunction between SO and OCN. Therefore, the 30-SO/OCN nanocomposites were confirmed to be highly active and reliable water-treatment photocatalysts.

Graphitic carbon nitrideHeterojunctionHydrogen peroxidePhotocatalyticTin oxideVisible light

Chen Y.、Jiang Y.、Chen B.、Tang H.、Li L.、Ding Y.、Duan H.、Wu D.

展开 >

College of Mechanical and Electrical Engineering Hohai University

Institute of Chemical and pharmaceutical Engineering Changzhou Vocational Institute of Engineering

2022

Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN:0925-8388
年,卷(期):2022.903
  • 53