Fabrication of heterostructured Ag/AgCl@g-C3N4@UIO-66(NH2) nanocomposite for efficient photocatalytic inactivation of Microcystis aeruginosa under visible light

Gongduan Fan; Jiajun Zhan; Jing Luo; Jiuyang Lin; Fangshu Qu; Banghao Du; Yifan You; Zhongsen Yan

doi:10.1016/j.jhazmat.2020.124062

Fabrication of heterostructured Ag/AgCl@g-C₃N₄@UIO-66(NH₂) nanocomposite for efficient photocatalytic inactivation of Microcystis aeruginosa under visible light

J Hazard Mater. 2021 Feb 15;404(Pt B):124062. doi: 10.1016/j.jhazmat.2020.124062. Epub 2020 Sep 25.

Authors

Gongduan Fan¹, Jiajun Zhan², Jing Luo³, Jiuyang Lin⁴, Fangshu Qu⁵, Banghao Du², Yifan You², Zhongsen Yan⁶

Affiliations

¹ College of Civil Engineering, Fuzhou University, 350116 Fujian, China; State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, 350002 Fujian, China; Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, 350002 Fujian, China.
² College of Civil Engineering, Fuzhou University, 350116 Fujian, China.
³ Fujian Jinhuang Environmental Sci-Tech Co. Ltd., 350002 Fujian, China.
⁴ Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, School of Environment and Resources, Fuzhou University, Fuzhou 350116, China.
⁵ Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Guangzhou University, Guangzhou 510006, China.
⁶ College of Civil Engineering, Fuzhou University, 350116 Fujian, China; State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, 350002 Fujian, China; Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials, Fuzhou University, 350002 Fujian, China. Electronic address: Zhongsen.yan@fzu.edu.cn.

PMID: 33068992
DOI: 10.1016/j.jhazmat.2020.124062

Abstract

In this work, a novel Ag/AgCl@g-C₃N₄@UIO-66(NH₂) heterojunction was constructed for photocatalytic inactivation of Microcystis aeruginosa (M. aeruginosa) under visible light. The photocatalyst was synthesized by a facile method and characterized by XRD, SEM, TEM, BET, XPS, FT-IR, UV-vis DRS, PL and EIS. The nanocomposite can not only provide lots of active sites, but also improve capacities to utilize visible-light energy and effectively transfer charge carriers, thus enhancing removal efficiencies of cyanobacteria (99.9% chlorophyll a was degraded within 180 min). Various factors in photodegradation of chlorophyll a were studied. Besides, changes on cellular morphologies, membrane permeability, physiological activities of M. aeruginosa during photocatalysis were investigated. Moreover, the cycle test indicated that Ag/AgCl@g-C₃N₄@UIO-66(NH₂) exhibits excellent reusability and photocatalytic stability. Finally, a possible mechanism of M. aeruginosa inactivation was proposed. In a word, Ag/AgCl@g-C₃N₄@UIO-66(NH₂) can efficiently inactivate cyanobacteria under visible light, thus providing useful references for further removal of harmful algae in real water bodies.

Keywords: Ag/AgCl@g-C(3)N(4)@UIO-66(NH(2)); G-C(3)N(4)@Mof; Heterojunction; Microcystis aeruginosa; Visible light.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Chlorophyll A
Light
Microcystis*
Nanocomposites*
Silver
Spectroscopy, Fourier Transform Infrared

Substances

Silver
Chlorophyll A