摘要
为扩展TiO_2光响应波长,该研究采用溶胶-凝胶法制备了Fe^(3+)掺杂TiO_2膜电极(Fe-TiO_2/Ti),并对其制备条件进行了优化,利用X射线衍射(XRD)和光电性能测试对其进行了分析表征。将其与Cu电极组装成斜置双极液膜反应器,以苋菜红为目标降解物,考察了可见光光催化反应的影响因素。结果表明,当n(Fe∶Ti)=8%、经450℃煅烧2.5 h制得的膜电极可见光光催化性能最好;最佳降解条件为初始p H为2.50、废水流量为85 m L/min、Na2SO4质量浓度为0.5 g/L、处理20 mg/L苋菜红90 min,脱色率可达91.2%。
In order to expand the TiO2 response to visible light, Fe3＋ - doped TiO2/Ti membrane electrode （Fe-TiO2/Ti） was prepared by sol-gel method. The characterization of photoelectric performance test and X-ray diffraction （XRD） demonstrated the Fe- TiO2/Ti was responsive to visible light. It＇s crystal shape was anatase and no new phase was found. The dual slant-placed electrodes thin-membrane reactor was assembled, using the prepared Fe-TiO2/Ti electrode as photoanode and Cu as cathode, and the photocatalytic activity was evaluated by the degradation of Amaranth solution under visible light irradiation. The main influence factors of the preparation of film electrode and PC reaction were investigated. Result shows Fe-TiO2/Ti film electrode has the best performance when n （ Fe： Ti） was 8% and calcination temperature was 450℃. The decolourization efficiency of 20 mg/L Amaranth reached 91.2% for 90 min treatment under the optimal conditions of initial pH of 2.50, circulating flux of 85 mL/min and mass fraction of Na2SO4 of 0.5 g/L.
出处
《净水技术》
CAS
2016年第1期61-66,共6页
Water Purification Technology
基金
国家自然科学基金青年项目(21206203)
