摘要
TiO2核壳材料作为光催化剂具有活性高、稳定性强、普适性广、应用前景广阔等优点而引起了人们广泛的兴趣。综述了近年来TiO2核壳材料用作光催化剂的最新研究成果,主要包括TiO2与金属、半导体、磁性材料等复合所得核壳材料及TiO2自身组成核壳材料在光催化领域的应用,指出TiO2与金属、半导体复合或离子掺杂等所得核壳材料都不同程度地提高了其催化性能;与磁性材料复合时虽然易于分离但是活性不理想;当以TiO2为核时,通过控制合成条件可以制备出孔径不同的TiO2壳层,该类核壳材料可以选择性地降解有机物。最后指出深入探讨TiO2核壳材料光催化机理、开发易回收高效TiO2催化剂及寻找简易制备TiO2核壳材料的方法是未来TiO2核壳材料研究的重要方向。
In recent years, the core-shell structures of titanium dioxide as photocatalyst have attracted great interest due to their high catalytic activity, substantial stability and brilliant perspective in applications. The core-shell hybrid materials of titanium dioxide combine metal, semiconductor, magnetic materials and the core-shell structures composed by titanium dioxide completely as photocatalyst have been reviewed briefly. It is reported that the photocata- lytic capabilities of titanium dioxide with core-shell structures are enhanced obviously when combined with metal, semiconductor and metallic ions. The core-shell hybrid materials of titanium dioxide combine magnetic materials as photocatalyst are helpful for separating the photocatalyst from reaction solution, and however their photocatalytic capabilities are not very well. The core-shell structures composed by titanium dioxide completely show size-selectivity for decomposition of organics. The future research directions for titanium dioxide core-shell materials are presented tentatively, including further studying their photocatalytic mechanism and exploring the easily prepared and recycled titanium dioxide core-shell structure with high photocatalytic capabilities.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2011年第13期25-30,共6页
Materials Reports
基金
国家自然科学基金重点项目(20602005
20873015)
四川省科技厅支撑项目(2009FZ0230)
关键词
TIO2
核壳结构
光催化
复合材料
titanium dioxide, core-shell structure, photocatalyst, hybrid material
