| 具有主导晶面的BiOIO3/BiOCl异质结制备与光催化性能 |
| Preparation and photocatalytic performance of BiOIO3/BiOCl heterojunction with dominated facet |
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| 摘要: 分别以乙二醇/去离子水为溶剂，通过溶剂热/水热法分别制备了具有不同主导晶面的BiOIO3/{110}BiOCl和BiOIO3/{001} BiOCl异质结。采用X射线衍射、扫描电子显微镜、能量色散谱和紫外可见漫反射光谱对制备的BiOIO3/BiOCl光催化剂进行了表征。在可见光照射下，通过对罗丹明B和苯酚水溶液的光催化降解，考察了BiOIO3/BiOCl异质结的光催化活性。结果显示25% BiOIO3/{110}BiOCl异质结具有最高的光催化效率。BiOIO3/{110}BiOCl较好的光催化性能是由于其在可见光区较强的光吸收，以及异质结结构和BiOCl所具有的（110）主导晶面有利于光生载流子的分离。超氧自由基（·O2-）和空穴（h+）是光催化过程中的主要活性物质。此外，根据实验结果探讨了光催化性能增强的机理。 |
| 关键词: 光催化 主导晶面 BiOIO3 BiOCl 异质结 |
| 基金项目: 福建省自然科学基金（No.2019J01260）资助 |
| Abstract: The BiOIO3/BiOCl heterojunctions with different dominated facet, BiOIO3/{110}BiOCl and BiOIO3/{001} BiOCl, were prepared through facile solvothermal/hydrothermal methods with ethylene glycol/deionized water as solvents. As-prepared BiOIO3/BiOCl photocatalysts were characterized by X-ray diffraction, scanning electron microscope, energy-dispersive spectroscopy, and UV-Vis diffuse reflectance spectra. The photocatalytic activity of BiOIO3/BiOCl heterojunctions was evaluated by photo-catalytically decomposing rhodamine B and phenol in an aqueous solution under visible light irradiation. The results showed that 25% BiOIO3/{110}BiOCl heterojunctions exhibited the highest photocatalytic efficiency. The degradation of RhB over 25% BiOIO3/{110}BiOCl was 98.7% after 15 min of light irradiation. And 100% phenol can be degraded after irradiation for 150 min. The better photocatalytic performance of BiOIO3/{110}BiOCl may be attributed to the strong absorption of the visible light, the heterojunction structure, and the efficient separation of photo-generated carriers benefiting from the dominated (110) facet of BiOCl. The superoxide radicals (·O2-) and holes (h+) are the main active species in the photocatalytic process. Moreover, a reasonable mechanism for enhanced photocatalytic performance was also discussed based on theexperimental results. |
| Keywords: photocatalysis dominated facet BiOIO3 BiOCl heterojunction |
| 投稿时间：2022-07-17 修订日期：2022-10-24 |
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| 黄宗益,郑遗凡,杨娥,宋旭春.具有主导晶面的BiOIO3/BiOCl异质结制备与光催化性能[J].无机化学学报,2023,39(2):263-271. |
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