Fe-TiO_2/膨润土对甲基橙染料废水光催化降解性能研究  

Study on Photocatalytic Degradation Properties of Supported TiO_2 Composite to Methyl Orange in Wastewater

作　　者：蒋月秀[1] 徐慧娟[1] 姚宗林[1] 高能菊[1] 韦丽梅[1] 童张法[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004

出　　处：《非金属矿》2008年第3期51-53,59,共4页Non-Metallic Mines

基　　金：广西教育厅科研基金资助项目(桂教科研[2006]26号)

摘　　要：以广西宁明膨润土为载体,采用溶胶-凝胶法及微波辐射下制备了掺铁TiO2负载型光催化剂——Fe-TiO2/膨润土复合材料,研究了废水的pH值、催化剂用量、Fe的掺杂浓度及废水初始浓度等因素对复合材料光催化降解甲基橙染料废水的影响。结果表明,当pH=4.21、催化剂用量为2.5g/L、Fe的掺杂浓度为0.2%、废水初始浓度为20mg/L、光照时间为60min时,甲基橙降解率可达96.13%;在实验浓度范围内,该光催化反应可用一级反应动力学方程描述,且Fe-TiO2/膨润土催化剂具有较高的活性稳定性,因而具有较好的应用前景。With the Bentonite from Ningmin of Guangxi as the carrier, the Fe（Ⅲ） doping TiO2 photocatalyst Fe-TiO2/bentonite composite was prepared by sol-gel technique under microwave irradiation. The effect of solution pH value, the amount of photocatalyst, doping content of Fe and the initial concentration of methyl orange on photocatalytic degradation of methyl orange on composite were studied, The results show that when solution pH value is 4.21, the amount of Fe-TiO2/bentonite is 2.5g/L, doping content of Fe is 0.2%, the initial concentration of methyl orange is 20mg/L ,illumination time is 60min, the degradation rate of methyl orange solution can reached to 96.13%. The reaction of photocatalysis for methyl orange can be expressed as first.order kinetic mode within the concentration range of methyl orange between 20mg/L and 50 mg/L. The Fe-TiO2/bentonite has a potential application in dye waster treatment for its high photocatalytic activity stability.

关 键 词：光催化 甲基橙 铁掺杂 TIO2/膨润土 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学]