Preparation of AgCl/Ag3PO4/Diatomite Composite                     by Microemulsion Method for Rapid Photo-Degradation of Rhodamine B with                     Stability under Visible Light

Hai-Tao Zhu; Qi-Fang Ren; Zhen Jin; Yi Ding; Xin-Yu Liu; Xi-Hui Ni; Meng-Li Han; Shi-Yu Ma; Qing Ye; Won-Chun Oh

doi:10.3740/MRSK.2020.30.8.383

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2020 Vol.30, Issue 8 Next Page

Preparation of AgCl/Ag₃PO₄/Diatomite Composite by Microemulsion Method for Rapid Photo-Degradation of Rhodamine B with Stability under Visible Light

August 2020. pp. 383-392

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Abstract

In this paper, AgCl/Ag₃PO₄/diatomite photocatalyst is successfully synthesized by microemulsion method and anion in situ substitution method. X-ray diffraction (XRD), photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM), and ultraviolet-visible spectroscopy (UV-Vis) are used to study the structural and physicochemical characteristics of the AgCl/Ag₃PO₄/diatomite composite. Using rhodamine B (RhB) as a simulated pollutant, the photocatalytic activity and stability of the AgCl/Ag₃PO₄/diatomite composite under visible light are evaluated. In the AgCl/Ag₃PO₄/diatomite visible light system, RhB is nearly 100 % degraded within 15 minutes. And, after five cycles of operation, the photocatalytic activity of AgCl/Ag₃PO₄/diatomite remains at 95 % of the original level, much higher than that of pure Ag₃PO₄ (40 %). In addition, the mechanism of enhanced catalytic performance is discussed. The high photocatalytic performance of AgCl/Ag₃PO₄/diatomite composites can be attributed to the synergistic effect of Ag₃PO₄, diatomite and AgCl nanoparticles. Free radical trapping experiments are used to show that holes and oxygen are the main active species. This material can quickly react with dye molecules adsorbed on the surface of diatomite to degrade RhB dye to CO₂ and H2O. Even more remarkably, AgCl/Ag₃PO₄/diatomite can maintain above 95 % photo-degradation activity after five cycles.

Keywords

AgCl/Ag₃PO₄/diatomite

microemulsion

visible light

photocatalysis degradation

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 30
No :8
Pages :383-392
Received Date : 2020-06-10
Revised Date : 2020-07-08
Accepted Date : 2020-07-14
DOI :https://doi.org/10.3740/MRSK.2020.30.8.383

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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