Synthesis and characterization of uniform silica nanoparticles on nickel substrate by spin coating and sol-gel method

摘要

Spin coating and sol-gel methods are proposed for the preparation of silica nanoparticles on a nickel substrate using silicon tetrachloride, 2-methoxyethanol, and four different types of alkaline solutions. The effects of the type of alkaline solution, concentration of silica solution, and speed of spin coating on the properties of silica nanoparticles are investigated systematically. Uniform spherical shape of silica nanoparticles on Ni with the smallest size are obtained with sodium carbonate among the alkaline solutions after stirring at 70 ℃ for 6 h and spin-coating at 7000 rpm. Physical and electrochemical properties of the silica particles are investigated.