Time-dependent synthesis of BiO2-x/Bi composites with efficient visible-light induced photocatalytic activity 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Journal of Colloid and Interface Science
年/卷/期
2018 / 531 /
页码
311-319
ISSN号
0021-9797
作者单位
Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China;Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China;Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China;Hunan Univ, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China;
作者
Ma, Hongmei;Zhao, Yan;Souvanhthong, Bouasavanh;Zhao, Jingzhe;
摘要
A series of BiO2-x/Bi nanocomposites were prepared via a time-dependent aqueous method, with the induction of lactic acid. The interaction of Bi3+ and C3H6O3 in stock solution determined the formation of nonstoichiometric BiO2-x as the precursor, subsequent reduction reaction at acid circumstance (pH = 3) produced combined composition of BiO2-x nanosheets and Bi particles. Multiple valence states of Bi element (Bi-0, Bi3+ and Bi5+) in the composite sample make it possible to manipulate the band structures of photocatalysts. The BiO2-x/Bi composites with appropriate composition exhibited superior photocatalytic performance in the degradation of colorless bisphenol A (BPA) under visible-light irradiation. The center dot O-2(-) and center dot OH radicals were detected as valid active species in the degradation process from ESR analysis. The photocatalytic mechanism over BiO2-x/Bi composites was proposed on the consideration of electron-hole separation and the interfacial charge transfer. (C) 2018 Elsevier Inc. All rights reserved.
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关键词/主题词
BiO2-x/Bi nanocomposites;Multiple valence states;Aqueous synthesis;Bisphenol A;Photodegradation mechanism;
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