Abstract: The recent progresses of codoped titania photocatalyst are reviewed. The photocatalytic degradation efficiency of titania can be further improved by codoping because of the synergy by doped elements. The mechanism of synergy of codoped titania are discussed from promoting visible light response，restraining recombination of photo-generated electrons and holes，increasing quantity of hydroxyl on the surface of catalyst，and other synergistic effects. The non-effective phenomena of synergy of codoped titania are introduced. Finally，the future research directions of codoped titania photocatalyst are also suggested.

摘要： 综述了近年来共掺杂二氧化钛光催化剂的研究进展。对二氧化钛进行共掺杂，掺杂的元素产生协同效应，可以进一步提高二氧化钛的光催化降解效率。从促进二氧化钛可见光响应、抑制光生电子与空穴的复合、提高催化剂表面羟基含量以及其它协同效应等方面，阐述了共掺杂二氧化钛的协同作用机制，介绍了共掺杂二氧化钛协同作用的失效现象，并对共掺杂二氧化钛光催化剂未来的研究方向提出了建议。