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Received:October 10, 2019
Received:October 10, 2019
中文摘要: 采用水热合成法通过调控反应前驱液pH值制备出具有不同形貌结构的碘酸氧铋（BiOIO3）光催化剂。采用X射线衍射仪（XRD）、扫描电子显微镜（SEM）和紫外-可见吸收光谱（UV-vis）等测试方法对合成的样品进行物相、形貌及光学性能表征。以罗丹明B和2，4-二氯苯酚的降解效率来评价在不同合成条件下所制备BiOIO3的光催化活性。结果表明，反应前驱液的pH值影响所合成BiOIO3的形貌结构及光催化性能，只有反应液的pH值在酸性条件下，所得产物为纯的BiOIO3。在pH值为2~3的酸性范围内所制备的BiOIO3纳米片具有优异的光催化活性，光辐射15 min时，罗丹明B的降解效率可达95%，光生空穴是主要的氧化活性基团。
Abstract:A series of BiOIO3 samples with different structures were successfully synthesized by the hydrothermal method by adjusting the pH value of precursor.The physical and chemical properties of the as-prepared samples were characterized by X-ray diffraction,scanning electron microscopy,and ultravoilet-visible absorption spectrophotometry.The photocatalytic activities were evaluated by the degradation of Rhodamine B and 2,4-DCP in water aqueous.The results showed that the morphology and crystal structure of BiOIO3 products could be controlled by the pH value of precursor.Only in the strong acid conditions,the products were pure BiOIO3.The nanosheets sample prepared at 2 ≤ pH ≤ 3 possessed remarkable photocatalytic performance and the degradation ratio of Rhodamine B could reach about 95% after 15 min light irradiation.The photogenerated holes were the main oxidative species responsible for the degradation of RhB.
keywords: hydrothermal BiOIO3 photocatalysis pH value
文章编号：20201008 中图分类号：O643.36 文献标志码：
基金项目:国家自然科学基金（21671133）。
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