稀土掺杂TiO_2光催化抗菌材料的制备与性能研究

采用溶胶-凝胶法并结合旋转涂膜法制备了稀土掺杂光催化抗菌薄膜(Ce/TiO2,Pr/TiO2,Gd/TiO2,Dy/TiO2,Y/TiO2,Eu/TiO2),研究了烧结制度、烧结温度、烧结时间、稀土掺杂量等因素对材料光催化抗菌性能的影响,分别确定了最佳制备工艺条件.结果表明,除Ce掺杂TiO2薄膜含有极少量金红石型TiO2外,其余全部由单一锐钛矿型TiO2构成,薄膜表面均存在缺陷;RE/TiO2光催化抗菌薄膜对大肠杆菌平均杀菌率皆在90%以上,较纯TiO2杀菌率(34%)有明显提高.稀土元素掺杂显著提高了光催化材料对可见光的响应.材料经反复使用和高温、高压、冲刷等处理,薄膜完整不脱落,始终有很...

Preparation and Characteristics of RE-Doped TiO2 Photocatalytic Antibacterial Materials

The RE-doped TiO2 such as i.e. Ce/TiO2, Pr/TiO2, .Gd/TiO2, Dy/TiO2, Y/TiO2 and Eu/TiO2, photocatalytic antibacterial films were prepared by sol-gel method in combination with spinning coating process. The effects of sintering schedule, temperature, time and doping amount on their bactericidal potency are investigated to determine the optimum conditions for preparing the six types of RE-doped TiO2 films mentioned above. The results revealed that the structures of all RE/TiO2 films are made up singly of anatase, except for the Ce/TiO2 films which contain few rutile in addition to anatase. However, all of their surfaces are found defective obviously. Comparing with the pure TiO2 films whose average bactericidal rate to E. coli is 34 %, that of all the above six films are over 90% because the RE doping improves greatly the photocatalytic materials in response to visible light. The films have durably high bactericidal rate and stability even after used repeatedly and treated or washed at high temperature and under high pressure without peel-off found, thus providing high performance and good prospects in application.