Visible light-induced photocatalytic degradation of tetrabromobisphenol A on platinized tungsten oxide

被引：0

作者：

Tarif A. ^{[1
]}

Tran K.D. ^{[2
]}

Ahn Y.-Y. ^{[3
]}

Kim K. ^{[3
]}

Kim J. ^{[2
]}

Park H. ^{[1
]}

机构：

[1] School of Energy Engineering, Kyungpook National University, Daegu

[2] Department of Environmental Sciences and Biotechnology, Hallym University, Chuncheon, Gangwon-do

[3] Korea Polar Research Institute (KOPRI), Incheon

来源：

Chemosphere | 2024年 / 363卷

基金：

新加坡国家研究基金会;

关键词：

Flame retardant; Platinized tungsten oxide; Tetrabromobisphenol A; Toxicity assessment; Visible light;

D O I：

10.1016/j.chemosphere.2024.142785

中图分类号：

学科分类号：

摘要：

In this study, we investigated the degradation of the flame retardant tetrabromobisphenol A (TBBPA) using platinized tungsten oxide (Pt/WO3), synthesized via a simple photodeposition method, under visible light. The results of degradation experiments show a significant enhancement in TBBPA degradation upon surface platinization of WO3, with the degradation rate increasing by 13.4 times compared to bare WO3. The presence of Pt on the WO3 surface stores conduction band electrons, which facilitates the two-electron reduction of oxygen and enhances the production of valence band holes (hVB+) and hydroxyl radicals (●OH). Both hVB+ and ●OH are significantly involved in the degradation of TBBPA in the visible light-irradiated Pt/WO3 system. This was verified through fluorescence spectroscopy employing coumarin as a chemical probe and oxidizing species-quenching experiments. The analysis of degradation products and their toxicity assessment demonstrate that the toxicity of TBBPA-contaminated water is significantly reduced after Pt/WO3 photocatalysis. The degradation rate of TBBPA increased with increasing Pt/WO3 dosage, reached an optimum at a Pt content of 0.5 wt%, but decreased with increasing TBBPA concentration. The decrease in degradation efficiency of Pt/WO3 was minor, both in the presence of various anions and after repeated use. This study proposes that Pt/WO3 is a viable photocatalyst for the degradation of TBBPA in water under visible light. © 2024 Elsevier Ltd

引用

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