中文摘要：

采用水热法制备得到了二氧化钛纳米管,并对其进行了TEM、XRD及N2吸附的表征.考察了不同pH的X3B在紫外光、氙灯及可见光下的降解反应.结果表明：不同pH体系,中性条件降解效果最佳,碱性条件降解效果最差;中性体系下,紫外光、氙灯和可见光降解速率常数分别为0.0428,0.0424和0.00522 min-1.研究表明：以紫外光为光源、体系pH为7时,降解效果最优,约经1.5 h,其X3B降解率达99%.

英文摘要：

Titanium dioxide nanotubes（TNT） was synthesized successfully by hydrothermal method with P25 as the starting material.The samples were characterized by TEM,XRD and BET.The degradation of the X3B at different pH with titanium dioxide nanotubes under ultraviolet light,xenon lamp and visible light were studied.The degradation is best in neutral condition,and worst in alkaline condition.In addition,at pH=7,the degradation rate constants with ultraviolet light,Xenon and visible light are 0.0428,0.0424 and 0.00522 min-1 respectively.The best conditions were found to be with ultraviolet light as the light source and pH of 7,at which the X3B degradation was 99 % after 1.5 h.