石墨棒载Bi_xTiO_y-TiO_2复合膜电极光电催化降解亚甲蓝  

Photoelectrocatalytic Degradation of Methylene Blue Using Bi_x TiO_y-TiO_2 Complex Films Electrode Supported Graphite Rod

作　　者：张祖云[1] 石倩[1] 王玉萍[1,2] 杨维本[1] 

机构地区：[1]南京师范大学化学与材料科学学院,江苏南京210097 [2]江苏省化工污染控制与资源化重点实验室,南京理工大学,江苏南京210013

出　　处：《南京师大学报（自然科学版）》2013年第4期72-77,共6页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：国家自然科学基金(51278253);江苏省环保科技专项基金(2013002);中央高校基本科研业务费专项资金(30920130122007);化工污染控制与资源化江苏省高校重点实验室开放基金;南京师范大学光电重点实验室基金

摘　　要：利用溶剂热-浸渍烧结法制备了高温石墨棒负载Bi x TiO y-TiO2复合膜电极.利用X射线衍射(XRD)、紫外-可见漫反射(UV-Vis)、扫描电镜(SEM)和能谱(EDS)等手段对催化剂和电极进行表征.以亚甲蓝为目标物,研究了电极对亚甲蓝的光电催化作用并讨论了外加电压以及负载膜层次数对亚甲蓝去除率的影响.实验结果表明,加入一定量的尿素可提高催化剂中Bi12TiO20的含量,增强其对可见光的吸收能力.Bi x TiO y-TiO2/C电极具有明显的光电催化活性,能够在250 W金卤灯下有效地去除溶液中的亚甲蓝,对于浓度为10 mg/L亚甲蓝水溶液,采用高温碳棒负载3层Bi x TiO y-TiO2膜电极为阳极,外加电压为2 V,0.5 mol/L Na2SO4溶液中光电催化降解2 h,10 mg/L亚甲蓝的去除率可达83.63%.The film electrode of BixTiy-TiO2 composite loaded on high temperature graphite rod was prepared by solvothermal reaction and dipping and sintering method. The particles and electrode were characterized by X-ray diffraetion （ XRI））, ultraviolet-visible diffuse retlectanee spectroscopy （ UV-Vis ）, scanning electron microscopy （ SEM ） and energy disperses spectroseopy （EDS）method. Methylene blue as the target, photoelectric catalysis activity of electrode for methylene blue was studied. The influence of impressed voltage and number of eoating layers on the removal efficiency of methylene blue were investigated. The experimental results showed the content of Bi12TiO20 in nmterials and absorptive capacity in visible area were increased due to added urea. The photoelectrocatalytie removal efficiency of 10 mg/L methylene blue ean reach 83.63% under 250 W haloid lamp irradiation for 120min,and using graphite rod supported 3 coating layers N-doped Bi,TiO -TiO2 thin film as working electrode,0.5 mol/L Na2 SO4 as supporting electrolyte with 2 V impressed voltage.

关 键 词：BixTiy-TiO2复合膜 光电催化 降解 亚甲蓝 

分 类 号：TQ116.2[化学工程—无机化工]