Ai Cuiling, Wu Xuefang, Ke Yuting, Lei Yingjie, Shao Xiangwen
College of Civil Engineering, Fuzhou University, Fuzhou, 350108 Fujian China.
Department of Chemistry & Chemical Engineering, Tianjin University of Technology, Tianjin, 300384 China.
J Inorg Organomet Polym Mater. 2020;30(9):3378-3387. doi: 10.1007/s10904-020-01491-z. Epub 2020 Mar 23.
The photocatalyst sorbic acid (SA)/titanium dioxide (TiO) was successfully synthesized by sol-gel method and characterized. The composite exhibited regularly spherical particles with the size of 50 nm and the specific surface area of 90.3 m g, furthermore, it showed mesoporous structure and significantly improved dispersion. SA was grafted on TiO surface by -COOTi and TiO existed as pure anatase phase in the composite. The addition of SA made the band gap of TiO increased from 3.03 to 3.35 eV, which indicting that the composite exhibited a strong response to the ultraviolet light. The optimum preparation parameters of the catalyst were as follows: n(Ti):n(SA) = 1:0.05, ethanol 60 mL, glacial acetic acid 40 mL, hydrothermal temperature 180 °C, hydrothermal time 12 h. The composite could reach the 4.31 log reduction of , with the optimum catalyst dosage of 0.7 g L, irradiated by UV light for 60 min. SA/TiO was an environmentally friendly, non-toxic and safe sterilized nanocomposite material appropriate for future bactericidal applications, providing a new way to effectively increase the dispersion of TiO particles to achieve superior photocatalytic sterilization efficiency.
采用溶胶 - 凝胶法成功合成并表征了光催化剂山梨酸（SA）/二氧化钛（TiO₂）。该复合材料呈现规则的球形颗粒，粒径为50nm，比表面积为90.3m²/g，此外，它还具有介孔结构且分散性显著提高。SA通过 -COO-Ti接枝在TiO₂表面，且TiO₂在复合材料中以纯锐钛矿相存在。SA的加入使TiO₂的带隙从3.03eV增加到3.35eV，这表明该复合材料对紫外光有强烈响应。催化剂的最佳制备参数如下：n(Ti):n(SA) = 1:0.05，乙醇60mL，冰醋酸40mL，水热温度180°C，水热时间12h。在最佳催化剂用量为0.7g/L、紫外光照射60min的条件下，该复合材料对[具体物质]的去除率可达4.31个对数级。SA/TiO₂是一种环保、无毒且安全的杀菌纳米复合材料，适用于未来的杀菌应用，为有效提高TiO₂颗粒的分散性以实现卓越的光催化杀菌效率提供了一种新途径。
