摘要
采用溶胶-凝胶法制备TiO2薄膜光电极,作为工作电极,铂丝为对电极,饱和甘汞电极为参比电极,对硝基苯的光电催化降解进行了研究。结果表明:该电极具有n型半导体的特征行为。在外加偏压为+0.6V、pH=1、50mg/L的H2O2中对初始浓度为50mg/L的硝基苯溶液光照120min降解率达65.68%。讨论了外加偏压、硝基苯浓度和pH值等因素对光电催化反应的影响,并且在硝基苯降解时所产生的中间产物中,可以检测到有邻硝基苯酚、对硝基苯酚、间硝基苯酚和硝酸根存在及其分布情况。
A three-electrode system composed of TiO2/Ti prepared by sol-gel method as the working electrode, Pt wire as the counter electrode and saturated calomel electrode （SCE） as the reference electrode was used for the photoelectrocatalytic degradation ofnitrobenzene. The results showed that TiO2/Ti electrode had the property of n-semiconductor; under the conditions of pH=1,50mg/L H2O2, external potential ＋0.6V and 120min irradiation, the rate of photodegradation of nitrobenzene reached to 65.68%. The influences of various parameters and the distribution of reaction products were studied.
出处
《水处理技术》
CAS
CSCD
北大核心
2006年第4期19-22,共4页
Technology of Water Treatment
基金
湖北省教育厅2004重点科研项目(鄂科教[2004]6号)
关键词
光电催化
TiO2/Ti电极
硝基苯
产物分布
photoeleetrocatalysis
TiO2/Ti electrode
nitrobenzene
reaction product distribution
