钛基SnO2纳米涂层电催化电极的制备及性能研究

为提高Ti/SnO2电极的电催化性能,采用溶胶-凝胶法,并结合高温热处理工艺制备了钛基SnO2纳米涂层电催化电极.以苯酚为目标污染物,考察了所制备电极的电催化性能,并采用XRD、SEM、XPS等方法研究了制备的SnO2纳米涂层电极的表面形貌、晶粒粒径、元素组成和表面元素的化学环境等.研究结果表明:由于纳米涂层具有较大的比表面积,使得所制备电极的性能较非纳米涂层的钛基二氧化锡电极大为提高,完全降解等量苯酚所需时间减少了33.3%.电极表面主要是四方相金红石结构的SnO2晶体,粒径在10 nm以下.

Investigation on preparation and electrocatalytic characteristics of Ti-base SnO2 electrode with nano-coating

In order to enhance the electrocatalytic characteristics of Ti/SnO_2 electrode, a type of Ti-base tin dioxide electrocatalytic electrode with nano-coating was prepared by the sol-gel method and the thermal oxidation techniques.Taking phenol as a model pollutant,the efficiency of electrochemical degradation and the service life of electrodes was investigated.Additionally,the micrograph of the electrode surface,the particle size of nanometer coating,the element composition of different layers and the chemical environment of Sn and Sb in the electrode surface were analyzed with the help of SEM,XRD and XPS.It was found that the nano-coating electrodes have a higher efficiency for phenol degradation than do electrodes with a non-nanostructured coating.The degradation time decreased by 33.3% compared to the phenol's degradation.The results also showed that the surface of the electrode was mainly SnO_2 crystal with rutile structure and the particle size of the nanometer coating was about 10 nm.