Visible-light-driven g-C 3 N 4 /Cu 2 O heterostructures with efficient photocatalytic activities for tetracycline degradation and microbial inactivation

被引：19
作者：
Liu B. [1 ]
Wu Y. [1 ]
Zhang J. [2 ]
Han X. [1 ]
Shi H. [1 ]
机构：
[1] School of Material and Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou
[2] School of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou
来源：
Journal of Photochemistry and Photobiology A: Chemistry | 2019年 / 378卷
基金：
中国国家自然科学基金;
关键词：
g-C [!sub]3[!/sub] N [!sub]4[!/sub] /Cu [!sub]2[!/sub] O; Heterostructures; Inactivation mechanism; Photocatalysis; Tetracycline;
D O I：
10.1016/j.jphotochem.2019.04.007
中图分类号：
学科分类号：
摘要：
g-C 3 N 4 /Cu 2 O composites were successfully synthesized by a facile chemical precipitation method. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FESEM), transmission electron microscopy (TEM) and UV diffuse reflectance spectroscopy (UV-DRS) techniques were employed to characterize the as-synthesized photocatalysts. The photocatalytic experiments indicated that the g-C 3 N 4 /Cu 2 O composites displayed higher photodegradation activity of tetracycline (TC) and inactivation efficiencies of Escherichia coli (E. coli) as well as Fusarium graminearum (F. graminearum) in comparsion with bare g-C 3 N 4 and Cu 2 O under visible light irradiation. Photoluminescence (PL) spectra implied that the heterojunction between g-C 3 N 4 and Cu 2 O could efficiently promote the separation efficiency of photo-induced charge carriers. Active species trapping experiment and electron spin resonance (ESR) analysis revealed that [rad] O 2 − , [rad] OH and h + played important roles in the photocatalytic process. This study could provide new insights into the design of multifunctional g-C 3 N 4 -based photocatalysts for environmental purification. © 2019 Elsevier B.V.
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页码：1 / 8
页数：7
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