溴氧化铋(BiOBr)光催化剂的制备与改性研究进展

Progress in Preparation and Modification of BiOBr Photocatalysts

【目的】综述溴氧化铋(BiOBr)作为光催化剂的最新进展,深入分析其晶体结构、光催化机制、多种制备方法及高效改性策略,并探讨相关改性方法的成效。【方法】通过文献回顾和分析,详细介绍了BiOBr的晶体结构特性和光催化作用机理。对比和评估了不同的BiOBr制备技术及其优缺点。进一步讨论了各种改性手段,如离子掺杂、贵金属沉积、异质结构建、染料敏化和与新型材料的复合,并分析了这些方法提高光催化活性的途径。【结果】研究表明,通过多种制备技术可以调控BiOBr微观结构和改进光催化性能。从成本,制备难易、稳定性角度评价,最优的改性方法是贵金属沉积法。【结论】尽管BiOBr作为光催化剂已取得显著的研究进展,但仍面临诸如制备成本高、光生电子-空穴复合率高等挑战。未来的研究应着重开发更简便、稳定的BiOBr制备方法和进一步提高其光催化性能及稳定性。此外,对BiOBr光催化剂的回收和再利用也应给予足够的关注。

[Purposes]In this study,the latest development of Bismuth bromide oxide(BiOBr)as a photo-catalyst was reviewed,and its crystal structure,photocatalytic mechanism,various preparation methods and efficient modification strategies were analyzed,and the effectiveness of modification methods was discussed.[Methods]Through literature review and analysis,the crystal structure and photocatalytic mechanism of BiOBr were introduced in detail.Different BiOBr preparation techniques and their advan-tages and disadvantages were compared and evaluated.Various modification methods,such as ion dop-ing,precious metal deposition,heterostructure construction,dye sensitization and composite with new materials,are discussed,and the ways to improve the photocatalytic activity of these methods are ana-lyzed.[Findings]The results showed that the microstructure of BiOBr and the photocatalytic performance could be improved by various preparation techniques.From the perspective of cost,preparation difficulty and stability,the optimal modification method is precious metal deposition method.[Conclusions]Al-though BiOBr has made remarkable progress as a photocatalyst,it still faces challenges such as high preparation cost and high photogenerated electron-hole recombination rate.Future research should focus on developing more simple and stable BiOBr preparation methods and further improving its photocatalytic performance and stability.In addition,sufficient attention should be paid to the recycling and reuse of BiOBr photocatalysts.