摘要
自合成二氧化钛-碳纳米管(TiO2-CNT)复合催化剂,用Nafion溶液把CNT-TiO2固定到玻碳电极上制成CNT-TiO2/GC修饰电极,以耐兰染料为测定对象,进行光电化学响应研究.结果表明,在pH 7.2的磷酸盐缓冲液中,示差脉冲伏安法(DPV)测定,分散兰1于-0.4V(vs Ag/AgCl)处产生良好的阴极还原峰,电极对耐兰染料的吸附过程符合Langmuir吸附,其光电响应值高于碳糊/TiO2电极.高光电响应意味着复合材料制成电极后,对有机染料废水的检测限更低,灵敏度更高.
The carbon nano-tube/ titanium dioxide/glassy carbon （CNT/TiO2/GC） electrode was prepared using Nation solution to immobilize CNT-TiO2 on glassy carbon electrode. The analysis method for the photo-electrochemical catalysis of nile blue was investigated. The experimental results showed that the sensor displayed an excellent electrocatalytical response to the Nile blue in a phosphate buffer medium （pH 7.2）, which was measured by using Differential Pulse Voltammetry. A sensitive reductive potential peak of Nile blue was observed at -0.4V （vs Ag/AgC1） on the CNT/TiO2/GC electrode. A Langmuir type of adsorption of Nile blue on the electrode was found. The photo-electrochemical response of the TiO2-CNT/GC electrode was stronger than that of the TiO2/carbon paste electrode. That meant the TiO2-CNT/GC electrode had higher sensitivity to and lower detection limit of dyes in wastewater.
出处
《浙江工业大学学报》
CAS
2006年第4期369-372,共4页
Journal of Zhejiang University of Technology
基金
浙江省分析测试基金资助项目(04125)
