合成条件对纳米TiO_(2)材料光催化性能的影响

Effect of synthesis conditions on photocatalytic properties of nano-TiO

为研究不同合成条件对纳米TiO_(2)材料光催化性能的影响,在低温、水热及不同表面活性剂(聚乙二醇与十六烷基三甲基溴化铵)下制备纳米TiO_(2)材料,选择甲基橙溶液为模拟污染物,通过光催化性能测试合成条件对纳米TiO_(2)材料光催化性能的影响。结果表明:低温制备纳米TiO_(2)材料随甲基橙溶液浓度提升,光催化性能上升,50℃合成的纳米TiO_(2)材料光催化性能最优,对甲基橙溶液降解脱色率超过98%;180℃水热法合成纳米TiO_(2)材料在25 min时即对甲基橙溶液实现快速降解,降解脱色率超过95%,光催化性能优异;添加表面活性剂对纳米TiO_(2)材料光催化性能影响较大,添加质量分数为TBT的0.09%的聚乙二醇合成纳米TiO_(2)材料的降解效果最佳。

In order to study the effect of different synthesis conditions on the photocatalytic performance of nano-TiO_(2) materials,nano-TiO_(2) materials were prepared under three synthetic conditions of low temperature,hydrothermal and different surfactants(polyethylene glycol and cetyltrimethylammonium bromide). Methyl orange solution was selected as the simulated pollutant,and the photocatalytic performance test was conducted to analyze the effect of synthesis conditions on the photocatalyticperformance of nano-TiO_(2) materials. The results show that the photocatalytic performance of nanometer TiO_(2) materials preparedat low temperature increases with the rise of the initial concentration of methyl orange solution. The photocatalytic performance ofnanometer TiO_(2) materials synthesized at low temperature of 50 ℃ is the best,and the degradation and decolorization rate ofmethyl orange solution exceeds 98%. 180 ℃ hydrothermal synthesis of nano-TiO_(2)materials can quickly transform the methylorange solution in 25 minutes after the experiment,with a degradation rate of more than 95%,and the photocatalyticperformance is extremely excellent. The addition of surfactants has a great influence on the photocatalytic properties of nano-TiO_(2)materials. The nano-TiO_(2)material prepared with 0.09% polyethylene glycol has the best degradation effect.