磁性银掺杂TiO_(2)纳米管的合成及抗菌活性  

Synthesis of Magnetic TiO_(2)Nanotubes Doped with Ag^(+) and the Antibacterial Activity

作　　者：罗瑢泽 张会利 陈亚欣 丁雨杰 张小乐 LUO Rong-ze;ZHANG Hui-li;CHEN Ya-xin;DING Yu-jie;ZHANG Xiao-le(,School of Life Science,North China University of Science and Technology,Tangshan 063210,China;Tangshan Xuyang chemical Co.,Ltd,Tangshan 063606,China)

机构地区：[1]华北理工大学生命科学学院,河北唐山063210 [2]唐山旭阳化工有限公司,河北唐山063606

出　　处：《唐山师范学院学报》2024年第6期13-18,共6页Journal of Tangshan Normal University

基　　金：国家自然科学基金项目(21377034);河北省自然科学基金项目(B2020209005);华北理工大学大学生创新创业项目(X2024225)。

摘　　要：利用溶胶凝胶法合成了银掺杂的TiO_(2)纳米颗粒,然后在浓碱液中通过水热反应卷曲成纳米管,最后采用共沉淀法在纳米管上负载磁性Fe_(3)O_(4)颗粒,制备了一种磁性银掺杂的TiO_(2)纳米管复合材料。合成的复合材料中,银掺杂TiO_(2)纳米管的平均直径约为10nm,其上负载着10nm左右的Fe_(3)O_(4)颗粒;该材料对大肠杆菌和缓慢葡萄球菌均具有良好的抗菌活性,最小抑制浓度和最小杀菌浓度都分别为100mg·L^(-1)和400mg·L^(-1);62.5mg·L^(-1)的复合材料处理240min后可达95%以上的杀菌率。同时,该复合材料具有超顺磁性和较高的饱和磁通量(17.26emu·g^(-1)),处理之后可方便地进行磁分离回收,以便重复使用,节约了处理成本。Silver-doped TiO_(2)nanoparticles were synthesized using sol-gel method and were curled into nanotubes through hydrothermal reaction under concentrated alkaline condition.Subsequently,magnetic Fe_(3)O_(4)particles were loaded onto the nanotubes by a co-precipitation method to form magnetic TiO_(2)nano-tubes doped with Ag^(+).The Ag^(+)doped TiOz nanotubes,with an average diameter of about 10 nm,were anchored with plenty of Fe_(3)O_(4)particles of 10nm in diameter.The composite exhibited high antibacterial ability toward Escherichia coli and Staphylococcus lentus,with low minimum inhibitory concentration(1oo mg·L^(-1))and minimum bactericidal concentration(400 mg·L^(-1))for both strains.Bactericidal ratio of higher than 95%could be achieved after treatment with 65 mg·L^(-1)of the composite for 4h.Additionally,the composite,with superparamagnetism and a high saturation magnetization of 17.26 emu·g^(-1),can be easily recovered after treatment,which greatly reduces the processing cost and facilitates reuse.

关 键 词：TiO_(2)纳米管 银离子掺杂 磁分离能力 合成 抗菌活性 

分 类 号：X703.1[环境科学与工程—环境工程]