新型 B 掺杂 BiOCl 纳米片具有暴露的（001）面和增强有机污染物降解效率的光催化机制。
Novel B-doped BiOCl nanosheets with exposed (001) facets and photocatalytic mechanism of enhanced degradation efficiency for organic pollutants.
机构信息
School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong, China.
School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510000, Guangdong, China; School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519000, Guangdong, China.
出版信息
Sci Total Environ. 2019 Dec 1;694:133727. doi: 10.1016/j.scitotenv.2019.133727. Epub 2019 Aug 3.
Novel B doped BiOCl nanocrystals (B-BiOCl) with exposed (001) facets were fabricated via a facile solvothermal route. The characterization methods of XRD, BET, SEM, TEM, UV-vis DRS, PL, EIS, ESR and photocurrent measurement were performed to investigate the physicochemical properties of the B-BiOCl samples. The results indicated that doping B into BiOCl could regulate and control the growth of (001) crystal facet, increase the specific surface areas and enhance the efficiency of charge separation. Hence, the optimal B-BiOCl (atomic ratio of Bi:O:Cl: B is around 27.41: 28.27:25.43:3.55) exhibited significant promoting effect for the degradation of phenol, bisphenol A and rhodamine B than that of pure of BiOCl. The results of radical capturing and ESR analysis confirmed that the O radicals played a fatal role in the degradation of organic pollutants. This work could be expected to offer a new insight into design and synthesis of highly efficient photocatalyst with specific exposed facets by doping non-metallic elements.
通过简便的溶剂热路线制备了具有暴露（001）面的新型 B 掺杂 BiOCl 纳米晶体（B-BiOCl）。采用 XRD、BET、SEM、TEM、UV-vis DRS、PL、EIS、ESR 和光电流测量等表征方法研究了 B-BiOCl 样品的物理化学性质。结果表明，B 掺杂到 BiOCl 中可以调节和控制（001）晶面的生长，增加比表面积并提高电荷分离效率。因此，最佳的 B-BiOCl（原子比为 Bi：O：Cl：B 约为 27.41：28.27：25.43：3.55）对苯酚、双酚 A 和罗丹明 B 的降解表现出比纯 BiOCl 更显著的促进作用。自由基捕获和 ESR 分析的结果证实，O 自由基在有机污染物的降解中起着致命的作用。这项工作有望为通过掺杂非金属元素设计和合成具有特定暴露面的高效光催化剂提供新的思路。
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