Preparation for Nano-titania Catalyst and Its Application for Benzene Decomposition
Tao Zhu, Ling Lu, Yazhong Dai, Jinlan Zhou, Hanxiang Shi, Yuezhan Shi, Yurong Liu and Changsheng Liu
Journal Title:Nature Environment and Pollution Technology
In the experiment, nano-titania film was prepared by sol-gel method. The raw materials and experimental conditions were optimized for preparing TiO2 thin film. We draw the conclusion as follows: n[Eth]:n[Ti(OBu)4] = 18(Mole ratio), n[AcAc]:n[Ti(OBu)4] = 1.2(Mole ratio), n[H2O]:n[Ti(OBu)4] = 2.5 (Mole ratio), pH = 3~5, hydrolysable temperature = 25~35°C, and heat treatment temperature = 450°C. Then the photocatalysts were packed into nonthermal plasma reactor, and a synergistic control experiment for benzene decomposition was carried out, that is, nano-titania photocatalyst with nonthermal plasma. The results show that benzene removal efficiency has an order of “with anatase photocatalyst in the plasma reactor > the mixture photocatalyst of anatase and rutileat > rutileat photocatalyst”, and the effect of degradation was visible by added photocatalyst in the plasma reactor. When concentration of benzene was 1500 mg/m3 and voltage was 30 kV, the removal efficiency was increased 19% higher with photocatalyst than without photocatalyst. Obviously, the synergistic effect of nano-TiO2 catalyst and non-thermal plasma is very effective for benzene decomposition.