锐钛矿型纳米TiO_2的制备及其对甲基红的光催化降解  

Preparation of Anatase-Phase Nano-TiO_2 and Photocatalytic Degradation of Methtl Red

作　　者：严安[1] 刘泽华[1] 黄静[1] 

机构地区：[1]天津市制浆造纸重点实验室天津科技大学材料科学与化学工程学院,天津300457

出　　处：《天津科技大学学报》2009年第4期45-48,53,共5页Journal of Tianjin University of Science & Technology

基　　金：国家自然科学基金资助项目(50503016)

摘　　要：利用溶胶–凝胶法制备纳米级锐钛矿二氧化钛粉末,并用XRD、FTIR、SEM、AFM等手段对粉体的尺寸、微观形貌、结构和性能进行表征,考察该粉体对甲基红的催化氧化能力.结果表明:产物为锐钛矿型TiO2纳米粉末,其直径约为20.nm;当甲基红的初始质量浓度为20.mg/L,纳米TiO2投加量为0.7.g/L时,经功率为8.W、波长365.nm的紫外灯照射30.min后,甲基红降解率达到95.58%.The anatase TiO2 nano-power was prepared by the sol-gol method. The size,appearance,structure and property of TiO2 were analyzed by XRD,SEM,FTIR and AFM. The photocatalytic oxidation properties were examined by the degradation of methly red. The results show that the samples are anatase TiO2 particles with diameter of 20 nm. When the concentration of methyl red is 20 mg/L and the dosage of the powers is 0.7 g/L ,the degradation rate of methyl red is up to 95.58% after irradiated half an hour with the 8 W ultraviolet lamp with L=365 nm.

关 键 词：溶胶-凝胶法 二氧化钛 甲基红 光催化性能 

分 类 号：O64[理学—物理化学]