负载型TiO2光催化降解染料酸性蓝的研究

以硅酸钠为粘结剂,将纳米TiO2固定在焦炭载体上,制备了负载型纳米TiO2光催化剂。在紫外灯和太阳光分别照射下,对酸性蓝染料进行光催化降解研究。探讨了催化剂投加量、外加氧化剂量和反应时间等因素对光催化降解反应的影响。结果表明:在紫外光照射下,催化剂用量1 g/L、10%H2O2用量0.2 mL、浓度20 mg/L的酸性蓝染料经40 min处理,其脱色率达到93%;若改用太阳光照射,其脱色率则达到96%,证明光催化氧化法可以有效地降解酸性蓝染料。此外,还对负载型TiO2催化降解酸性蓝染料的机理进行了初步探讨。

Study on Photocatalytic Degradation of Acid Blue by immobiled TiO2

It was studied that the degradrtion of Acid Blue with immobiled nanosized TiO_2 photocatalyst that nanosized TiO_2 was stuck to caramel by Sodium silicate,using ultraviolet lamp or sunlight as light source.The results showed,under ultraviolet lamp conditions of immobilized nanosized TiO_2 of 1 g/L and 10 % H_2O_2 of 0.2 mL that the system had marked degration effect for Acid Blue.The concentration reducing contect of Acid Blue with the concentration of 20 mg/L was more than 93 % in 40 minutes.under sunlight conditions,The concentration reducing contect was more than 96 %.Besides,the principle and mechanism of the degradrtion of acid blue with immobiled nanosized TiO_2 photocatalyst were discussed.