CONVERSION RATE CONTROL OF TiCl₄ HYDROLYSIS TO PREPARE NANO TiO₂

In the water/triethanolamine/ethanol system, TiCl₄ aqueous solution is used as the precursor to regulate the conversion rate of TiCl₄ by changing the reaction temperature, water volume, pH value, and ethanol amount. The experiment uses a single-factor method to investigate the dynamic relationship between Ti⁴⁺ concentration and time under various factors, thereby achieving controllable TiO₂ production. The experimental results showed that under a single factor, the conversion rate showed a trend of first steep and then slow growth within 180 min. After 180 min, the conversion rate tended to stabilize. Considering various factors, it was found that V_TiCl4:V_C6H15NO3:V_H2O:V_C2H5OH = 1:6:15:30, pH = 7, reaction time at room temperature was 4 h, and the hydrolysis effect was good. The final conversion rate was 90.46%, and the hydrolysis reaction conforms to the first-order reaction equation. Kinetic parameters: pre-factor (A) = 0.107, activation energy (E_a) = 4488.65 J mol^-1.

Keywords:
TiCl₄; hydrolysis; TiO₂; reaction kinetics