掺杂TiO_2粉体的可见光抗菌活性研究  

Study on Visible-Light Antibacterial Activity of Doping TiO_2 Powder

作　　者：雅菁[1,2] 鄂磊[2] 辛颖[2] 刘志锋[2] 徐廷献[1] 

机构地区：[1]天津大学材料学院,天津300372 [2]天津城市建设学院材料科学与工程系,天津300384

出　　处：《材料导报（纳米与新材料专辑）》2008年第2期114-116,共3页

基　　金：天津市"高等学校科技发展基金计划项目"资助(20060910)

摘　　要：采用化学沉淀法制备纳米TiO_(2-x)N_x粉体,使粉体的禁带宽度变窄,在可见光下表现出较高的抗菌率(32%)。再采用浸渍法制备掺Fe的TiO_(2-x)N_x粉体,实现TiO_2粉体的金属-非金属双掺杂。Fe-TiO_(2-x)N_x粉体在可见光下的抗菌率随着掺Fe量的增加呈先增加后减小的趋势,当掺杂量为0.5%(原子分数)时抗菌活性最高,达71%。Nano-size TiO2--xNx powers are prepared by chemical precipitation method,which makes the band- gap narrowed. So, the doping powders have higher antibacterial activity（32 % ） in the visible-light. Then the Fe-TiO2--xNx powders are prepared by dipping method. Therefore, the TiO2 powders are doped by metal-nonmetal elements. The antibacterial activity of Fe-TiO2--xNx powders in the visible-light increases with the Fe content, and the maximal antibacterial activity of 71% can be obtained when the Fe doping content is 0. 5at%. Afterwards, the antibacterial activity decreases with the increase of Fe doping content exceeding the 0. 5at%.

关 键 词：掺杂 抗菌活性 TIO2 可见光 

分 类 号：TQ134.11[化学工程—无机化工] S859.796[农业科学—临床兽医学]