TiO_2/竹炭复合材料对甲基橙的吸附和光催化降解动力学  

Adsorption Behavior and the Photocatalytic Degradation Kinetics of Methyl-orange on TiO2/Bamboo Charcoal Composite

作　　者：陈杰斌[1] 胡志彪[1] 周云龙[1] 李冬香[1] 丘则海[1] 姜秀榕[1] 

机构地区：[1]龙岩学院化学与材料学院,福建龙岩364012

出　　处：《龙岩学院学报》2010年第2期64-67,共4页Journal of Longyan University

基　　金：福建省教育厅A类项目资助(JA07173);福建省青年人才项目(2007F3076);福建省教育厅A类项目资助(JA08230)

摘　　要：采用溶胶-凝胶法制备了TiO2/竹炭复合材料,并研究其对甲基橙的暗态吸附规律和光降解性能。结果表明:复合材料对甲基橙的吸附是物理吸附,吸附规律较好地符合Freundlich吸附等温模型;复合材料对甲基橙溶液的降解率随pH值升高而降低。在pH≈3时,紫外光辐照90 min条件下,复合材料投加量为16g/L时,对3.0×10-5mol/L的甲基橙溶液的降解率可达到90.68%;复合材料对甲基橙光催化反应可用一级反应动力学方程进行描述。TiO2/bambeo charcoal composites are prepared by sol-gel technique. The adsorption behavior and the photocatalytic degradation processes of methyl orange on the composites are studied. The results indicate that adsorption of methyl orange on the composites is physical adsorption and adsorption law of methyl orange on the composites fit in well with Freundlich model. With the increase of pH value, the degradation rate of methyl orange on the composites decreases. At.0×10^-5nol/L of methyl orange solution concentration and 16g/L of catalyst concentration under UV light irradiation for 90 min, the degradation rate of methyl orange can reach 90.68%. The photoeatalytic degradation of methyl orange on the composites fits in with the first-order kinetic order.

关 键 词：TIO2 竹炭 光催化 甲基橙 

分 类 号：X703.1[环境科学与工程—环境工程]