泡沫镍载二氧化钛光催化降解磺基水杨酸

为了探索有机物在固定后光催化剂上的降解行为，将TiO₂（锐钛型）粉末固定在多孔泡沫镍上，以一只6W主波长为365nm的紫外线杀菌灯为光源，研究了磺基水杨酸（Ssal）在TiO₂-Ni体系上的光催化降解。结果表明，Ssal的降解动力学可采用Langmuir-Hinshelwood（L-H）方程来描述。通过测定降解反应的半衰期和测定初始速率的方法确定了L-H方程的参数，两种方法的结果相吻合。还研究了Ssal的光催化降解反应速率与Ph值和温度的关系。结果表明，当Ph值为7.5左右时，Ssal的光催化降解最为有利；当温度从20℃升至50℃时，Ssal的光催化降解加快。通过考察不同Ph值时Ssal在TiO₂-Ni体系上的吸附能力探讨了反应初始速率与Ph值的关系

The photocatalytic degradation of sulfosalicylic acid using TiO 2 supported on porous nickel.

In order to investigate the degradation behaviour of organics on the supported photocatalyst,TiO 2(anatase) has been immobilized on porous nickel.The photocatalytic degradation of sulfosalicylic acid (SSal) was studied using one 6 W 365 nm UV lamp as light source.The kinetics of photocatalytic degradation rate of SSal can be described by Langmuir Hinshelwood(L H) expression.The parameters of the L H expression have been determined by different experimental ways and the results are satisfactory.The photocatalytic degradation of SSal under pH values and temperatures was also investigated.The results show that 7.5 pH is most favorable to the degradation rate and that an increase in temperature leads to acceleration of the degradation.The dependence of degradation rate on pH may be explained by the adsorption behavior of SSal on TiO 2 Ni system.