In this study, Z-scheme TiO_2-x/AgI heterostructure photocatalysts were fabricated through a solvothermal route and an in situ precipitation method. Compared with pure TiO_2-x and AgI, the obtained composite photocatalysts displayed significantly higher photocatalytic degradation efficiency of Rhodamine B (RhB) and tetracycline (TC). The analysis of antimicrobial properties demonstrated that the TiO_2-x/AgI-20% composite could also effectively inactivate Escherichia coli (E. coli) and Fusarium graminearum (F. graminearum) macroconidia under visible light. Active species trapping experiments as well as electron spin resonance spectra (ESR) revealed the importance of •O₂^– and •OH during photocatalysis. Analysis of transient photocurrents and electrochemical impedance spectroscopy (EIS) confirmed that the charge transfer and separation efficiency was significantly improved through the Z-scheme system. It was expected that the novel TiO_2-x/AgI composite would be a promising candidate photocatalyst for the environmental applications.

在本研究中，通过溶剂热途径和原位沉淀法制备了Z型TiO _2-x / AgI异质结构光催化剂。与纯TiO _2-x和AgI相比，所获得的复合光催化剂显示出罗丹明B（RhB）和四环素（TC）的光催化降解效率明显更高。抗菌性能分析表明，TiO _2-x / AgI-20％复合材料还可以有效地灭活大肠杆菌 （E. coli）和禾谷镰刀菌 （F. graminearum））在可见光下的大分生孢子。活性物种捕获实验以及电子自旋共振谱（ESR）透露•ø的重要性₂ ^-和•OH的光催化过程。对瞬态光电流和电化学阻抗谱（EIS）的分析证实，通过Z方案系统，电荷转移和分离效率得到了显着提高。可以预期，新型的TiO _2-x / AgI复合材料将成为有希望的用于环境应用的光催化剂。