Photocatalytic degradation of organic pollutants using surfactant-free hydrothermally prepared flower-like BiOBr hierarchical structures under visible light irradiation

9th International Conference on Environmental Science and Development

生态环境科学;经济学

Sin, J.C.^1 ; Lim, C.A.^1 ; Lam, S.M.^2

Department of Petrochemical Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, Perak, Kampar

31900, Malaysia^1

Department of Environmental Engineering, Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, Jalan Universiti, Bandar Barat, Perak, Kampar

31900, Malaysia^2

关键词: Characterization tests;    Experimental conditions;    Hierarchical structures;    Photo catalytic degradation;    Photocatalytic performance;    Photocatalytic reactions;    Reactive oxygen species;    Visible-light irradiation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/151/1/012022/pdf
DOI  :  10.1088/1755-1315/151/1/012022

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Flower-like BiOBr hierarchical structures were successfully prepared via a facile hydrothermal route in the absence of any surfactants. Various characterization tests were carried out to analyze the as-prepared BiOBr samples. By utilizing the flower-like BiOBr as photocatalysts, enhanced photocatalytic performance on the sunset yellow degradation was observed in comparison with the BiOBr nanosheets and commercial TiO2. The photocatalytic enhancement was ascribed to the unique hierarchical porous surface structure with good crystallinity and optical properties, which could improve the electron-hole pairs separation and led to high yield of reactive oxygen species for photocatalytic reaction. Other organic pollutants such as bisphenol A and methylparaben were also successfully degraded over flower-like BiOBr under similar experimental conditions.