Visible-light-driven g-C3N4/Cu2O heterostructures with efficient photocatalytic activities for tetracycline degradation and microbial inactivation

被引：32

作者：

Liu, Bingkun ^{[1
]}

Wu, Yajun ^{[1
]}

Zhang, Jingtao ^{[2
]}

Han, Xiaole ^{[1
]}

Shi, Hengzhen ^{[1
]}

机构：

[1] Zhengzhou Univ Light Ind, Sch Mat & Chem Engn, Zhengzhou 450002, Henan, Peoples R China

[2] Zhengzhou Univ Light Ind, Sch Food & Bioengn, Zhengzhou 450002, Henan, Peoples R China

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-C3N4/Cu2O; Heterostructures; Photocatalysis; Tetracycline; Inactivation mechanism; ESCHERICHIA-COLI; CUPROUS-OXIDE; COMPOSITE PHOTOCATALYST; HYBRID PHOTOCATALYST; WATER; CU2O; HETEROJUNCTION; DISINFECTION; TIO2; PERFORMANCE;

D O I：

10.1016/j.photochem.2019.04.007

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

g-C3N4/Cu2O 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-C3N4/Cu2O composites displayed higher photodegradation activity of tetracycline (TC) and inactivation efficiencies of Escherichia colt (E. colt) as well as Fusariurn graminearum (F. graminearum) in comparsion with bare g-C3N4 and Cu2O under visible light irradiation. Photoluminescence (PL) spectra implied that the heterojunction between g-C3N4 and Cu2O could efficiently promote the separation efficiency of photo-induced charge carriers. Active species trapping experiment and electron spin resonance (ESR) analysis revealed that center dot O-2(,), center dot OH and h(+) played important roles in the photo catalytic process. This study could provide new insights into the design of multifunctional g-C3N4-based photocatalysts for environmental purification.

引用

页码：1 / 8

页数：8

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