| F掺杂制备具有高暴露(001)晶面的BiOCl纳米片及其光催化性能 | |
| Preparation by F Doping and Photocatalytic Activities of BiOCl Nanosheets with Highly Exposed (001) Facets | |
| 摘要: 采用溶剂热-煅烧法，通过F掺杂合成了一系列具有高暴露（001）晶面的BiOCl纳米片。应用X射线衍射、N2物理吸附、扫描电子显微镜、透射电子显微镜、X射线光电子能谱、紫外可见漫反射光谱、红外光谱和光电流响应等物理化学方法对合成的样品进行了表征分析。结果表明，掺杂适量的F可以促进BiOCl（110）优势晶面的生长，形成高暴露（001）晶面，同时可抑制BiOCl晶粒的长大，并增大BiOCl纳米片的比表面积和提高其表面羟基的数量。在模拟太阳光下，光催化降解偶氮染料罗丹明B结果表明，F掺杂能显著提高BiOCl对罗丹明B的光催化降解活性。其中F1.0-BiOCl对罗丹明B的降解速率是BiOCl的2.67倍。此外，F1.0-BiOCl对酸性橙Ⅱ的光催化降解活性是商业光催化剂P25（TiO2）的1.24倍。F掺杂引起光催化活性大幅提升的主要原因是，高暴露（001）晶面的生成提升了BiOCl纳米片对染料的吸附性能，同时加快了光生e-和h+分离。 | |
| 关键词: BiOCl 氟掺杂 (001)晶面 染料降解 光催化 | |
| 基金项目: 国家自然科学基金（No.21567008，21962006，21707055）、广东省高等学校珠江学者特聘教授资助计划（2009）、广东省自然科学基金（No.2019A1515011249）、广东省普通高等学校重点科研项目（自然）（No.2019KZDXM010）、江西省主要学科学术带头人（No.20172BCB22018）和广东石油化工学院创新团队支持计划资助。 | |
| Abstract: By using F doping, a series of BiOCl nanosheets with highly exposed (001) facets were synthesized by a solvothermal-calcination route. The fabricated bare BiOCl and F doped BiOCl nanosheets were characterized by some physicochemical methods, e.g. X-ray diffraction, N2 physical absorption, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy, and photoelectrochemical measurement. The results show that F doping with moderate content can promote the growth of (110) crystal plane and suppress the crystal size, inducing the for-mation of highly exposed (001) facets. Moreover, an obvious increase in surface area and surface -OH groups were obtained after F-doping. Under simulated sunlight irradiation, F doping obtained significant enhancement in the degradation of rhodamine B, and about 1.67 times increase over F1.0-BiOCl than that of bare BiOCl. Moreover, the degradation rate of F1.0-BiOCl was 1.24 times that of commercial P25(TiO2) in removal of acid orange Ⅱ. The main reasons for the increase of activity are that the exposed (001) facets induced by F-doping promoted dyes adsorption, and the separation of photo-generated electron-hole pair was also accelerated. Therefore, F-BiOCl nanosheets display superior photocatalytic performance for organic dyes degradation. | |
| Keywords: BiOCl F-doping (001) facets dye decomposition photocatalysis | |
| 投稿时间：2020-04-13 修订日期：2020-05-20 | |
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| 何洪波,张梦凡,刘珍,樊启哲,杨凯,余长林.F掺杂制备具有高暴露(001)晶面的BiOCl纳米片及其光催化性能[J].无机化学学报,2020,36(8):1413-1420. | |
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