Abstract: The precursor Sn0.75Ti(OCH2CH2OH)(7-x) was synthesized by electrolysis of titanium and tin in glycol solution. Nano-crystalline SnO2/TiO2 powder was prepared by direct hydrolysis from the precursor and then calcined for 2 h at 400 ℃.The metal alkoxide was characterized by FT-IR and Raman spectra. The mono-dispersed structure and the diameter of nano-SnO2/TiO2 were observed by XRD and SEM. The results showed that SnO2/TiO2 of 100~200 nm was obtained in organic solution. The highly active nano-SnO2/TiO2 electrode was prepared using electro-synthesis and sol-gel method. The cyclic voltammetry was used to study the redox behavior and electro-catalytic activity of the nano-SnO2/TiO2 electrode in HCl/m-NO2C6H4OH solution. The current density of the electrode increased obviously and reached to 143×10-3 A/cm2. The electrode potential difference of the redox peaks decreased obviously. The COD removal rate of m-nitrophenol reached to 86.1% and the SnO2/TiO2 electrode had high electro-catalytic activities.

Key words: metal alkoxide, nano- SnO2/TiO2, Electro-catalysis, m-Nitrophenol