Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jhazmat.2017.07.031
Title: Efficient photodegradation of chlorophenols by BiOBr/NaBiO3 heterojunctioned composites under visible light
Authors: Han, Aijuan 
Zhang, Hongwei 
Lu, Di
Sun, Jiulong
Chuah, Gaik Khuan 
Jaenicke, Stephan 
Keywords: Science & Technology
Technology
Life Sciences & Biomedicine
Engineering, Environmental
Environmental Sciences
Engineering
Environmental Sciences & Ecology
Photocatalyst
Heterojunction
Bismuth oxybromide
Sodium bismuthate
Chlorophenols
PHOTOCATALYTIC DEGRADATION
CONTROLLABLE SYNTHESIS
ORGANIC CONTAMINANTS
DRIVEN
DECOMPOSITION
BI2WO6
NABIO3
4-CHLOROPHENOL
MECHANISM
DESIGN
Issue Date: 5-Jan-2018
Publisher: ELSEVIER SCIENCE BV
Citation: Han, Aijuan, Zhang, Hongwei, Lu, Di, Sun, Jiulong, Chuah, Gaik Khuan, Jaenicke, Stephan (2018-01-05). Efficient photodegradation of chlorophenols by BiOBr/NaBiO3 heterojunctioned composites under visible light. JOURNAL OF HAZARDOUS MATERIALS 341 : 83-92. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jhazmat.2017.07.031
Abstract: © 2017 Elsevier B.V. Forming heterojunctioned composites is an effective way to develop visible-light-driven photocatalysts. A series of BiOBr/NaBiO3 composites were synthesized by surface transformation of NaBiO3 with hydrobromic acid. Commensurate planes of BiOBr and NaBiO3 enabled the formation of a closely bound interface. Composites with <20 wt.% BiOBr exhibited excellent photocatalytic activity towards the degradation of chlorophenols under low intensity visible light (λ > 400 nm). The best photocatalyst was 9% BiOBr/NaBiO3 with a quantum yield of 0.365. No photocorrosion was observed after three cycles. Using radical scavengers and inert atmosphere, holes, superoxide and hydroxyl radicals were found to be involved in the photoactivity of the BiOBr/NaBiO3 composite. Hydroxylated and open-ring diacid molecules were identified as intermediates in the mineralization of 4-chlorophenol.
Source Title: JOURNAL OF HAZARDOUS MATERIALS
URI: https://scholarbank.nus.edu.sg/handle/10635/155383
ISSN: 0304-3894
1873-3336
DOI: 10.1016/j.jhazmat.2017.07.031
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