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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Synthesis of Bi4O5Br2 from reorganization of BiOBr and its excellent visible light photocatalytic activity
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Synthesis of Bi4O5Br2 from reorganization of BiOBr and its excellent visible light photocatalytic activity

机译：BiOBr的重组合成Bi4O5Br2及其优异的可见光催化活性

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摘要

In this study, a novel visible-light-driven Bi4O5Br2 photocatalyst was successfully synthesized via the structure reorganization of BiOBr at room temperature using NH3 center dot H2O as a structure-controlling agent. The obtained Bi4O5Br2 exhibited outstanding visible light activity and stability compared to BiOBr and P25 for the degradation of resorcinol. The physicochemical properties of Bi4O5Br2 were analyzed and calculated by modern characterization techniques and density functional theory (DFT). The results revealed that the excellent performance could be mainly attributed to the effect of O-richness on the electronic properties of Bi and Br atoms, unique morphology, high visible-light absorption capacity, and prominent oxidation ability of photo-induced holes. Radical trapping experiments demonstrated that h(+) and (OH)-O-center dot radicals were the dominant active species. Moreover, a structure reorganization mechanism was proposed, revealing that ammonia and the water-steeping process both played important roles in the fabrication of Bi4O5Br2. We believe that this facile method could be extended to fabricate other three component Bi-O-Br nanostructure systems and help elucidate the relationship between BiOBr and BixOyBrz.
机译：在这项研究中，通过使用NH3中心点H2O作为结构控制剂，在室温下通过BiOBr的结构重组成功地合成了一种新型的可见光驱动的Bi4O5Br2光催化剂。与BiOBr和P25相比，所获得的Bi4O5Br2在间苯二酚的降解方面表现出出色的可见光活性和稳定性。利用现代表征技术和密度泛函理论（DFT）对Bi4O5Br2的理化性质进行了分析和计算。结果表明，优异的性能主要归因于富氧对Bi和Br原子的电子性质的影响，独特的形貌，高可见光吸收能力以及光致空穴的突出氧化能力。自由基捕获实验表明，h（+）和（OH）-O-中心点自由基是主要的活性物质。此外，提出了一种结构重组机制，揭示了氨气和水浸过程在Bi4O5Br2的制造中都起着重要作用。我们认为，这种简便的方法可以扩展到制造其他三组分Bi-O-Br纳米结构系统，并有助于阐明BiOBr和BixOyBrz之间的关系。

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