期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 614, 期 -, 页码 677-689出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2022.01.008
关键词
Z-scheme AgVO3; RGO; C3N4; Porous photocatalytic membrane; Self-cleaning; Anti-bacteria
资金
- National Natural Science Foundation of China [21806060, 21808089, 21776110]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX19_1589]
- Natural Science Foundation of Jiangsu Province [BK20181230, BK20180192]
In this study, a novel AgVO3/RGO/C3N4-PVDF photocatalytic membrane was successfully fabricated, which exhibited excellent degradation efficiency towards tetracycline, high permeability, and antifouling activity.
The enhancement of the self-cleaning ability of photocatalytic membranes and their degradation efficiency over tetracycline (TC) still remains a challenge. In this study, an alternative silver vanadate quantum dots (AgVO3 QDs) doped reduced graphene oxide (RGO) and graphitic carbon nitride (C3N4) nanocomposites modified polyvinylidene fluoride (PVDF) membrane (AgVO3/RGO/C3N4-PVDF) was successfully fabricated to enhance the photocatalytic activity. The AgVO3/RGO/C3N4 nanocomposites were functioned as the active component for the photocatalytic membrane. The unique Z-scheme heterostructure of AgVO3/RGO/C3N4 and the porous PVDF framework synergistically enhanced the separation and transport efficiency of photogenerated carriers and facilitated the interaction between the photocatalyst and the pollutant. As a result, the degradation efficiency of TC for the AgVO3/RGO/C3N4-PVDF reached 88.53% within 120 min, which was higher than those of the binary component membranes (64.8% for RGO/C3N4-PVDF and 79.18% AgVO3/C3N4-PVDF). In addition, AgVO3/RGO/C3N4-PVDF exhibited high permeability (1977 L.m-2.h-1.bar-1) and excellent antifouling activity. Under visible-light irradiation, the flux recovery rate (FRR) increased from 92.4% to 99.1%. Furthermore, AgVO3/RGO/C3N4-PVDF could reject 97.4% of Escherichia coli (E. coli) owning to its self-cleaning capacity, and eliminated the E. coli under visible-light irradiation trough the photogeneration of h+. This study highlights a highly efficient photo -catalytic membrane based on a Z-scheme heterostructure, which may have a great potential application in practical wastewater treatment. (c) 2022 Published by Elsevier Inc.
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