Ce掺杂TiO2薄膜电极光电催化降解甲基橙

用溶胶-凝胶法制备了泡沫镍负载TiO2及Ce离子掺杂TiO2薄膜电极,并以其为工作电极,建立了三电极光电催化体系。通过对水溶液中甲基橙的降解实验,考察了催化剂热处理温度、涂敷层数、外加电压、铈掺杂等因素对薄膜催化剂光催化性能的影响,结果表明,泡沫镍是光催化剂的优良载体;经500℃处理所得催化剂主要为锐钛矿相,催化活性最好;外加适当电压,有助于光催化降解;Ce的掺杂有易于TiO2催化活性的改善;外加适当电压有助于甲基橙的光催化降解。研究证明,500℃为铈掺杂TiO2薄膜的最佳热处理温度,外加一定电压、涂敷3层、掺杂n(Ce)/n(Ti)=2%的铈时催化剂的活性最高。

The effects of Ce doped TiO2 film electrode on photoelectrocatalytic degradation of methyl orange

TiO_2 and Ce doped TiO_2 thin film electrode deposited on porous nickel were prepared by sol-gel method,Using the porous nickel electrode as working electrode ,the photoelectrocatalytic(PEC) system was built. Applying this system the degradation of methyl orange in aqueous solution was studied, The effects of calcined temperaturethe numbers of coating layer, electrode potential and the content of doped Ce were investigated by the degradation of methyl orange. The results showed that porous nickel was a good carrier and PEC oxidation was a convenient way to mineralizing the organic pollutants with high efficiency. It was found that the Ce doping could enhance the catalytic activity,the ceium doped film with n(Ce)/n(Ti)=2% has the highest photocatalytic degradation efficiency for methyl orange,and the optimal heat-treatment temperature for the catalyst is 500,the optimal coating layers is three.