活性炭负载TiO2光催化氧化二苯并噻吩的研究

以活性炭负载的TiO2为光催化剂，H2O2为氧化剂，30W紫外灯为光源，对含二苯并噻吩（DBT）的模型硫化物进行光催化氧化脱硫研究。考察了TiO2的煅烧温度、负载量、催化剂用量、H2O2用量和光照时间对DBT去除率的影响。实验结果表明，用溶胶 凝胶法制备的TiO2 /活性炭催化剂对DBT具有很好的光催化效果。最佳反应条件为，催化剂煅烧温度400℃，TiO2的负载量为32％，催化剂用量0.7g/100mL， H2O2最佳用量为10mL，即O/S（摩尔比）为14。在最佳反应条件下，光照时间8h，DBT去除率为90％, 此反应为一级动力学反应。

Study on photocatalytic oxidation of dibenzothiophene by activated carbon supported T I O2

The photocatalytic oxidation of dibenzothiophene (DBT) in n octane (as solvent) was conducted using H2O2 as oxidant， TiO2 loaded on activated carbon as photocatalyst and 30W ultraviolet lamp as light source. The effect of calcination temperature and the amount of TiO2 loaded on activated carbon, photocatalyst amount, H2O2 amount and the radiation time on the removal ratio of DBT were investigated in detail. The results show that the TiO2/activated carbon prepared by sol gel method has good catalytic activity to DBT oxidation. The optimal photocatalytic oxidation conditions of DBT are 400℃of calcination temperature， 32% of the amount of TiO2 loaded on activated carbon, 0.7g/100mL of the amount of photocatalyst and 10mL ( O/S(mol ratio)= 14) of the H2O2 amount. Under optimal conditions, the removal ratio of DBT is up to 90% by 8h radiation time. The photocatalytic oxidation of dibenzothiophene (DBT) DBT reaction is a first order reaction.