The Synergistic Effect of Adsorption-Photocatalysis for Removal of Organic Pollutants on Mesoporous CuVO/CuVO/g-CN Heterojunction

Overview

Journal Int J Mol Sci

Publisher MDPI

Specialties Biochemistry
Chemistry
Molecular Biology

Date 2022 Nov 26

PMID 36430740

Authors

Jian Feng

Xia Ran

Li Wang

Bo Xiao

Li Lei

Jinming Zhu

Zuoji Liu

Xiaolan Xi

Guangwei Feng

Zeqin Dai

Rong Li

Affiliations

Soon will be listed here.

Abstract

CuVO/CuVO/g-CN heterojunctions (CVCs) were prepared successfully by the reheating synthesis method. The thermal etching process increased the specific surface area. The formation of heterojunctions enhanced the visible light absorption and improved the separation efficiency of photoinduced charge carriers. Therefore, CVCs exhibited superior adsorption capacity and photocatalytic performance in comparison with pristine g-CN (CN). CVC-2 (containing 2 wt% of CuVO/CuVO) possessed the best synergistic removal efficiency for removal of dyes and antibiotics, in which 96.2% of methylene blue (MB), 97.3% of rhodamine B (RhB), 83.0% of ciprofloxacin (CIP), 86.0% of tetracycline (TC) and 80.5% of oxytetracycline (OTC) were eliminated by the adsorption and photocatalysis synergistic effect under visible light irradiation. The pseudo first order rate constants of MB and RhB photocatalytic degradation on CVC-2 were 3 times and 10 times that of pristine CN. For photocatalytic degradation of CIP, TC and OTC, it was 3.6, 1.8 and 6.1 times that of CN. DRS, XPS VB and ESR results suggested that CVCs had the characteristics of a Z-scheme photocatalytic system. This study provides a reliable reference for the treatment of real wastewater by the adsorption and photocatalysis synergistic process.

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