Photocatalytic properties of hierarchical BiOXs obtained via an ethanol-assisted solvothermal process.
Photocatalytic properties of hierarchical BiOXs obtained via an ethanol-assisted solvothermal process.
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DOI：
10.1016/j.jes.2014.09.045
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发表时间：
2015-09
影响因子：
6.9
通讯作者：
Manke Jia;Xiaolong Hu;Shulian Wang;Yingping Huang;Lirong Song
中科院分区：
文献类型：
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作者：
Manke Jia;Xiaolong Hu;Shulian Wang;Yingping Huang;Lirong Song
以乙醇为溶剂，四丁基卤化铵为卤素源，采用溶剂热法制备了卤氧化铋（BiOXs（X双键Cl，Br，I））半导体材料。在相同的合成条件下，BiOBr更容易构建成规则的花状层次结构。通过对具有可见光吸收的罗丹明B（RhB）和无色水杨酸（SA）的降解监测，研究了材料的光催化性能。结果表明，RhB和SA在BiOBr表面均能快速降解。BiOCl对RhB有较好的降解作用，但对SA的降解作用不明显。然而，无论是RhB或SA不能有效地降解的情况下，生物氧化物。进一步的实验，如紫外-可见光谱和检测ofradical dotOH和O2 radical dot− radical表明，BiOX光催化剂的电子结构是导致其活性差异的原因。
In this study, bismuth oxyhalide (BiOXs (Xdouble bondCl, Br, I)) semiconductors were prepared by a simple solvothermal method, with ethanol serving as solvent and a series of tetrabutylammonium halide surfactants as halogen sources. Under identical synthetic conditions, BiOBr was more readily constructed into regular flower-like hierarchical architectures. The photocatalytic properties of the materials were studied by monitoring the degradation of rhodamine B (RhB), with visible light absorption, and colorless salicylic acid (SA). It was found that both RhB and SA were rapidly degraded on the surface of BiOBr. BiOCl was rather active for the degradation of RhB, but ineffective toward the degradation of SA. However, neither RhB nor SA could be degraded effectively in the case of BiOI. Further experiments such as UV–visible spectroscopy and detection ofradical dotOH and O2radical dot−radicals suggest that the electronic structure of the BiOX photocatalysts is responsible for the difference in their activities.