The monodopants in TiO₂ can improve the visible light harvest of TiO₂ through the modification of the electronic structures and defects generation. However, most dopants will introduce extra electrons or holes in the system for the unbalanced charge and the defects also act as recombination centers for photo excited electron-hole pairs. The charge compensated codoping technique with donor and accepter is expected to overcome the shortcomings of the monodoping technique. The review collected some typical reports on the codoping effects in TiO₂ for high performance photocatalysts through the enhancement of visible light harvest. Theoretical calculation predicts some donor-acceptor codoped TiO₂ as practical photocatalyst for water purification or water splitting. In addition to the doping induced light response variation, the experimental results also reveal that the dopants and micromorphology show comprehensive influence on the photocatalytic performance in terms of photon absorption, exciton separation, carrier diffusion, carrier transport, catalytic efficiency and mass transfer phenomena. The review includes three sections to summarize metal/metal codoping, non-metal/non-metal codoping, and metal/non-metal codoping effects on visible light response and one more section to discussion the collaborative effects of bandgap, flat band potential, charge transport, charge transfer, surface potential, and concentration of surface active sites on the photocatalytic reaction.

以TiO所述monodopants ₂可提高TiO 2的可见光收获₂通过的电子结构和缺陷产生的修改。但是，大多数掺杂剂会为不平衡电荷在系统中引入额外的电子或空穴，并且缺陷也充当光激发电子-空穴对的复合中心。具有施主和受主的电荷补偿共掺杂技术有望克服单掺杂技术的缺点。该综述收集了一些典型报告，这些报告通过增强可见光收获来增强高性能光催化剂中TiO ₂的共掺杂效果。理论计算预测了一些供体-受体共掺杂的TiO ₂作为用于水净化或水分解的实用光催化剂。除掺杂引起的光响应变化外，实验结果还表明，掺杂剂和微观形态在光子吸收，激子分离，载流子扩散，载流子传输，催化效率和传质现象方面对光催化性能具有综合影响。这篇综述包括三部分，总结了金属/金属共掺杂，非金属/非金属共掺杂以及金属/非金属共掺杂对可见光响应的影响，以及另一部分讨论了带隙，平坦带电势，电荷的协同作用传输，电荷转移，表面电势和光催化反应中表面活性部位的浓度。