Bi_xTiO_y-TiO_2复合膜电极光电催化去除模拟压载水中细菌  

Photoelectrocatalytic Removal of Bacteria in Simulated Ballast Water Using Bi_xTiO_y-TiO_2 Composite Film Electrode

作　　者：张祖云[1] 刘媛[1] 蒋彩云[2] 王玉萍[1,3] 

机构地区：[1]南京师范大学化学与材料科学学院,南京210097 [2]江苏经贸职业技术学院工程技术系,南京210007 [3]化工污染控制与资源化江苏省高校重点实验室(南京理工大学),南京210093

出　　处：《应用化学》2014年第5期600-606,共7页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金资助项目(51278253);中央高校基本科研业务费专项资金(30920130122007);江苏省环保科技专项基金(2013002);化工污染控制与资源化江苏省高校重点实验室开放基金;江苏省"青蓝工程";江苏省生物医药功能材料协同创新中心和南京师范大学光电重点实验室基金资助~~

摘　　要：溶剂热-聚乙烯醇粘附法制备了钛网负载BixTiOy-TiO2复合膜电极。利用X射线衍射、紫外-可见漫反射、光致发光(PL)、扫描电子显微镜和能谱(EDS)等测试技术对合成的纳米材料和膜电极进行了表征。利用三电极系统对模拟压载水的灭菌效果进行实验研究。考察了外加电压、光源和膜电极的使用次数对光电催化灭菌效果的影响。UV-Vis实验表明,BixTiOy-TiO2复合材料比纯TiO2有好的可见光吸收;PL实验证明,复合材料比纯TiO2有更高光量子效率。对细菌浓度为106CFU/mL的模拟压载水的光电催化灭菌实验结果表明,外加电压为9 V,电极与溶液接触面积为140 cm2时,20 W紫外杀菌灯照射下反应2 min即可完全去除压载水中的细菌;聚乙烯醇粘附法制备的电极重复使用20次,灭菌效果不变。The BixTiOy-TiO2 composite film electrode was prepared using solvent thermal and adhesion method with polyvinyl alcohol. The as-prepared BixTiOy-TiO2 and film electrode were characterized by XRD, UV-Vis, photoluminescence（PL）, SEM, and EDS. The bacteria in simulated ballast water was removed by photoelectrocatalysis. The effects of impressed voltage, light source and number of use of electrode on the disinfection efficiency of photoelectrocatalysis were investigated. UV-Vis experiments show that absorption of BixTiOy-TiO2 composite materials in visible light region is greater than that of pure TiO2. PL experiments prove that light quantum efficiency of composite materials is higher than that of pure TiO2. The photoelectric catalysis experiments of simulated ballast water containing 106 CFU/mL bacteria show that the sterilization efficiency reaches 100% under 20 W germicidal lamp irradiation for 2 min. The impressed voltage is 9 V and the electrode contact area with solution is 140 cm2. Sterilization efficiency remains the same when the same electrode is used repeatedly 20 times.

关 键 词：BixTiOy-TiO2复合膜 光电催化 模拟压载水 灭菌 

分 类 号：O643[理学—物理化学]