Ag/TiO2聚丙烯负载膜的制备及其光催化与抗菌特性研究

以聚丙烯负载二氧化钛膜为载体,在一定浓度的AgNO3水溶液中,利用光还原在氧化钛膜表面还原Ag,制备载银二氧化钛负载膜,在室光和太阳光下,分别选择Ag/TiO2聚丙烯膜、TiO2聚丙烯膜和活性炭聚丙烯膜,研究膜的抗菌特性和光催化特性.结果表明:Ag/TiO2负载膜由于同时具有Ag和TiO2的双重效用,显示了良好的杀菌特性,无论是在室内还是太阳光下,都没有检测到活的微生物;在水溶液中检测Ag/TiO2负载膜和TiO2负载膜的光催化特性,发现由于银离子的催化活性中心的作用,光催化降解甲基橙的能力与TiO2负载膜相比,能够提高10%左右,显示了良好的光化学特性.

The Preparation of Ag/TiO2 Polypropylene Membrane and Its Photocatalytic and Antibacterial Property

Ag/TiO_2 loaded membrane was prepared with TiO_2 loaded polypropylene membrane as its carrier. Photo-reduction technology was used to reduce silver in AgNO_3 water solution of a certain concentration. The antibacterial and photocatalytic specificity of Ag/TiO_2 polypropylene membrane, TiO_2 polypropylene membrane and active carbon polypropylene membrane was studied under room light and sunlight. The result showed that Ag/TiO_2 loaded membrane exhibited good antibacterial property,because it had the activity of both the Ag and TiO_2. No matter when it was under room light or under sunlight, there were no live microbes examined. By examining the photocatalytic specificity of Ag/TiO_2 and TiO_2 loaded membrane, it was found that the ability of Ag/TiO_2 loaded membrane to photocatalyze methyl orange had been increased by 10% compared with that of TiO_2 loaded membrane which showed that Ag/TiO_2 membrane had good photocatalytic specificity.