高级氧化技术中分子筛负载纳米TiO_(2)的光催化性能的研究

Study on Photocatalytic Performance of Molecular Sieve Loaded Nano-TiO2 in Advanced Oxidation Technology

选择溶胶-凝胶方法制作纳米TiO_(2),且将纳米TiO_(2)负载于分子筛上面。实验结果表明,与非负载光催化剂相比,负载光催化剂具体性能更优。针对目标物实行降解时,最优条件为,pH值是4.7,H_(2)O_(2)最初的物质的量浓度是25 mmol/L,甲基橙最初的质量浓度是20 mg/L,增加量是2 g;温度升高有利于降解;随应用频次提升,催化剂具体活性渐渐下降。

Choose the solgel method to make nanoTiO_(2),and load the nanoTiO_(2) on the molecular sieve.The experimental results indicate that the specific performance of the supported photocatalyst is better than that of the unsupported photocatalyst.When the target is degraded,the optimal conditions are that the pH value is 4.7,the initial amountofsubstance concentration of H_(2)O_(2) is 25 mmol/L,the initial mass concentration of methyl orange is 20 mg/L,and the increase is 2 g;increasing temperature is conducive to degradation;as the application frequency increases,the specific activity of the catalyst gradually decreases.