软铋矿基微纳米材料的设计合成及其在光催化中的应用

Design and Synthesis of Sillenite-Based Micro/Nanomaterials and Their Applications in Photocatalysis

软铋矿基光催化材料以其独特的晶体结构、电子结构以及显著的可见光吸收能力吸引着研究者们浓厚的兴趣,然而,该材料由于自身结构及功能缺陷,如光生载流子极易复合、量子产量低、有限的活性位点、活性晶面暴露不足等,导致其光催化活性和稳定性仍有待提高。因此,如何在微纳尺度上对软铋矿基光催化剂进行结构设计和功能整合,进而实现光催化活性和稳定性的优化调变,仍是一个亟待解决的关键科学问题。本文主要综述了软铋矿基微纳米材料的合成策略及其在光催化领域的最新研究进展,重点就软铋矿基光催化材料的形貌调控、贵金属负载、半导体/石墨烯耦合、离子掺杂、新型软铋矿基光催化体系的开发等方面进行总结;同时对软铋矿材料在光催化领域的应用进行了探讨;最后对此类光催化材料今后的研究前景进行了展望。

The sillenite-based photocatalytic materials have attracted the researchers'interests because of their unique crystal and electronic structures,as well as remarkable visible light absorption abilities.However,they usually have poor photocatalytic activities and stabilities owing to their structural and functional defects,such as high recombination efficiencies of photo-generated charges,low quantum yields,limited active sites,and insufficient exposure of active crystal planes.Therefore,how to achieve optimal modulation of photocatalytic activity and stability based on the structural design and functional integration of sillenite-based photocatalysts on the micro-nano scale is still a key scientific problem.This paper mainly reviews the synthesis strategies of sillenite-based micro/nanomaterials and their latest research progress in the field of photocatalysis,especially focusing on the morphology control,noble metal loading,semiconductor/graphene coupling,ion doping and the development of new sillenite-based photocatalytic systems.Moreover,the photocatalytic applications of sillenite materials are discussed.Finally,the future research prospects of such photocatalytic materials are also pointed out.