TiO_2/甲壳素光催化降解甲基橙的性能

TiO_2/Chitin Composite for Photocatalytic Degradation of Methyl Orange

以钛酸四丁酯为钛原料,通过升高温度使尿素逐渐分解的方法制备胶体TiO2,将胶体TiO2固定到甲壳素上得到TiO2/甲壳素。以甲基橙水溶液为光催化降解模型,用分光光度计法测定TiO2/甲壳素的光催化性能。结果表明:在100 min的紫外光下,TiO2/甲壳素对甲基橙的催化降解率达到75.6%;经150 min太阳光照射,TiO2/甲壳素对甲基橙的降解率达到52.3%。TiO2/甲壳素对甲基橙10次的降解率在45.1%到73.9%之间。TiO2/甲壳素的红外光谱图有O-Ti-O键的特征吸收峰952.8 cm-1。本工作制备的TiO2/甲壳素具有良好的光催化降解甲基橙的能力。

Used tetrabutyl titanate as material,increased the temperature to gradually degrade the ureophil to prepare the colloid TiO2,fixed the colloid TiO2 on chitin and obtained TiO2/chitin.Methyl orange solution was used as model,the photocatalytic degradation ratio with TiO2/chitin was investigated by spectrophotometer method.The results revealed that the TiO2/chitin was an efficient photocatalyst for the degradation of methyl orange,and 75.6% of the methyl orange was degraded after 100 min using UV light,and 52.3% of the methyl orange was degraded under the sunlight after 150 min,respectively.The TiO2/chitin could degradate methyl orange for 10 times,and the degradation ratio was from 45.1% to 73.9%.There existed the peak belonging to the O-Ti-O band absorption at 952.8 cm-1.The TiO2/chitin has efficient ability for degradation of methyl orange.