摘要
以SnCl2/SbCl3的乙二醇/乙腈混合溶液浸渍大孔SiO2为载体,经多次水解沉积、高温煅烧制备出大孔ATO/SiO2电极.SEM和XRD分析表明,ATO(Sb-SnO2)纳米微粒均匀负载在SiO2薄层上,4次水解沉积材料体积电阻率10Ω.cm,比表面积77 m2.g-1.电化学测试表明,大孔ATO/SiO2电极在酸性条件下析氧电位2.5 V,且对对氯苯酚的降解具有良好的电催化性能,而Fe2+的添加又可显著提高羟基自由基的产生率,从而进一步增大该电极的电流效率.
The amacroporous ATO/SiO2 materials were prepared through mutiple steps of hydrolysis deposition in ethylene glycol and acetonitrile mixed solutions of SnCl2/SbCl3 and subsequent calcination at high temperature.The structures of the obtained materials were characterized by means of SEM and XRD.The results showed that the nano-ATO chemically deposited on the SiO2 support underwent well-controlled aggregation and recrystallization to form a sandwich structure（ATO-SiO2-ATO）.Through four times loading of ATO the volume resistivity and the specific surface area reached 10 Ω·cm and 77 m2·g-1,respectively.The oxygen evolution potential on electrochemical measurements showed that the macroporous ATO/SiO2 anode was 2.5 V in acidic condition and exhibited the electro-catalysis ability in degradation of 4-chlorophenol.It was also found that Fe2＋ can significantly improve the current efficiency of ATO/SiO2 macroporous electrode in 4-chlorophenol solution by promoting the generation of OH radicals.
出处
《电化学》
CAS
CSCD
北大核心
2011年第4期427-432,共6页
Journal of Electrochemistry
基金
973前期专项(No.2010CB635116)
宁波大学王宽诚基金资助
