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| 一锅法水热制备Bi3O4Cl-BiOCl复合材料及可见光催化性能研究 |
| One-pot hydrothermal synthesis of Bi3O4Cl-BiOCl composites and their photocatalytic performance |
| 投稿时间：2015-08-20 |
| DOI：10.13259/j.cnki.eri.2018.02.001 |
| 中文关键词: 光催化 Bi3O4Cl BiOCl pH 光催化机理 |
| 英文关键词:photocatalysis Bi3O4Cl BiOCl pH photocatalytic mechanism |
| 基金项目:国家自然科学基金（21207089）；教育部留学回国人员科研启动基金；沪江基金研究基地专项资助项目（B14003） |
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| 中文摘要: |
| 以五水合硝酸铋为铋源，通过一锅法水热制备铋基Bi3O4Cl-BiOCl复合光催化材料。采用X射线衍射、扫描电子显微镜和紫外可见漫反射对所制备的复合材料进行表征。通过实验发现，该复合材料在可见光下对罗丹明B溶液具有良好的光催化降解能力。制备过程中，溶液酸碱度的变化可调控复合材料组分的质量比，对样品的光催化性能影响较大，其中pH为10.5时制备的样品光催化活性最好，这可能和各组分合适的质量比以及较强的可见光吸收利用能力有关。通过活性物种捕捉实验，确定了光生空穴为光催化反应过程的主要活性物种，由此初步推测出复合材料的光催化机理。 |
| 英文摘要: |
| In this study, Bi(NO3)3·5H2O was used as a bismuth source to synthesize various Bi3O4Cl-BiOCl composites through a one-pot hydrothermal route. The as-synthesized samples were fully characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS). These as-prepared composites showed satisfactory photocatalytic performance toward the degradation of dye Rhodamine B. Among all candidates, sample pH-10.5, synthesized when pH value of the solution was 10.5, exhibited the highest catalytic behavior upon visible-light irradiation, possibly owning to the appropriate proportion of components, smooth interface and strong visible-light response. Active species trapping experiments confirmed the crucial role of holes during catalytic degradation, upon which a possible photocatalytic mechanism was proposed. |
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