Mechanism of photocatalytic oxidation of guanine by BiOBr under UV irradiation

Hou, Haobo; Wang, Xiaoxing; Chen, Chuncheng; Johnson, David M.; Fang, Yanfen; Huang, Yuewang

doi:10.1016/j.catcom.2014.01.023

Cited by 7 publications

(1 citation statement)

References 14 publications

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“…Therefore, the development of visible-light-driven (VLD) photocatalysts has been a growing concern. Bismuth oxybromide (BiOBr), as an important V-VI-VII ternary semiconductor, has recently drawn great attention due to its fascinating physicochemical prosperities, suitable bandgap, good VLD photocatalytic activity and high chemical stability, which are originated from its unique layered structure [8,9]. BiOBr has a tetragonal structure consisting of [Bi 2 O 2 ] slices interleaved by double slabs of Br atoms.…”

Section: Introductionmentioning

confidence: 99%

Boron doped BiOBr nanosheets with enhanced photocatalytic inactivation of Escherichia coli

Yue

Wang

et al. 2016

Applied Catalysis B: Environmental

232

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Boron (B) doped bismuth oxybromide (B-BiOBr) nanosheets were synthesized using a hydrothermal method and their photocatalytic activities were investigated through inactivating a typical bacterium, Escherichia coli K-12 using fluorescence tubes as visible light (VL) sources. B atoms are successfully doped into the crystal lattice of BiOBr. However, the morphology, crystal structure, and {001}-facet exposed feature of B-BiOBr nanosheets remain unchanged compared with pure BiOBr nanosheets. Significantly, the as-prepared B-BiOBr nanosheets show superior activity in the photocatalytic inactivation of E. coli K-12 over pure BiOBr nanosheets under VL irradiation. Photogenerated h + is evidenced to be the major reactive species accounting for the inactivation process of B-BiOBr. With its electron-deficient characteristics, the B dopant is favorable to accept extra e − from VB of BiOBr, leading to improved charge carrier separation efficiency. The greatly enhanced bacterial inactivation efficiency was attributed to the synergic advantages of enhanced VL adsorption capability and more amount of photogenerated h + with higher oxidative ability. In addition, the destruction process of bacterial cell was also observed from the destruction of cell membrane to the intracellular components.

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Section: Introductionmentioning

confidence: 99%