二氧化钛的水热制备及其催化性能评价

以工业钛液为原料,利用水热法制备二氧化钛催化剂。采用SEM、FT-IR、XPS、N2吸附脱附对样品进行表征,并对其催化性能进行考察。研究结果表明,试验所制二氧化钛具有较高的活性,对亚甲基蓝的光催化降解活性同P25接近;对NO的选择性还原反应随温度的升高,降解率呈现先增加后降低的趋势,其中450℃下的降解率最高,达到84.14%;其粒径分布为0.36~1.08μm,比表面90.47 m2/g。

Hydrothermal Synthesis of Titanium Dioxide and Its Photocatalytic Properties Evaluation

Titanium dioxide (TiO2) photo-catalyst was prepared via hydrothermal route from industrial titanyl sulfate solution.The obtained samples were characterized by SEM,FT-IR,XPS,nitrogen absorption-desorption test and the photocatalytic properties of the photo-catalyst were also evaluated.The results indicate that the prepared TiO2 possesses relatively higher photocatalytic activity,with an approximate photocatalytic degradation activity as P25 to methylene blue.With increase in temperature,the degradation rate in selective catalytic reaction for NO increases first and then gradually decreases,and the highest degradation rate of 84.14％ can be obtained at 450 ℃.The particle size of the catalyst is O.36 ～ 1.08 μm,and its specific surface is 90.47 m2/g.