水解法制备纳米二氧化硅和表征

Characterization and preparation of nanometer silica by hydrolysis

通过TEOS在碱性条件下水解生成纳米二氧化硅。通过控制pH、滴加速度、搅拌速度以及TEOS与乙醇的配比,得到小于100nm的二氧化硅,通过控制以上条件得到了粒径40nm的纳米材料。用红外光谱分析所得二氧化硅的官能团结构、TEM观察到二氧化硅的微观形态,通过电子能谱测定了硅和氧的比例为1∶2。

The paper study the alkaline hydrolysis of TEOS, the creation of nano-silica. Controlling the pH, dripping rate, agitating rate and the ratio of TEOS and ethanol, we can acquire the nano-silica whose size is below 100nm. And discuss the formation mechanism ofnano-silica and reaction condition, and acquire the 40nm nano-material by controlling the above condition. We can analyze the function group configuration of silica by in^ared spectrum and observe the microcosmic conformation of silica, at last determine the apposite hydrolysis reaction condition of silica. The proportion of Si and oxygen is 1：2 by the Binding Energy measurement.