TiO_2纳米管在不同条件光催化降解的活性研究  

Study on photocatalysis property of TiO_2 nanotube arrays in different conditions

作　　者：吕作凤[1] 张理元[1] 杨亮[1] 曹阳[1] 

机构地区：[1]海南优势资源化工材料应用技术教育部重点实验室,硅锆钛资源综合开发与利用海南省重点实验室,海南大学材料与化工学院,海南海口570228

出　　处：《化学工程师》2010年第2期1-4,共4页Chemical Engineer

基　　金：科技部国际科技合作项目(2009DFA92551);教育部重点科技项目(No:207091);海南省教育厅基金(Hjkj2008-01);海南大学重点项目(hd09xm22);海南大学创新团队项目(hd09xm03)

摘　　要：本文利用阳极氧化法在纯钛片表面制备了TiO2纳米管阵列膜,解决TiO2光催化剂的涂敷固定问题。采用场发射扫描电镜(FESEM)和XRD对制备TiO2纳米管阵列膜的形貌和晶体结构进行表征。结果发现,所制得的纳米管管径70～80nm,壁厚5～10nm,XRD显示经420℃热处理的TiO2纳米管为锐钛矿晶型,经500℃热处理的TiO2纳米管出现金红石晶型。以10mg·L-1的甲基橙溶液为降解物进行光催化试验,分别研究了溶液的初始pH值、TiO2纳米管阵列膜的晶型、TiO2膜的使用次数对降解率的影响。试验结果表明,当溶液初始pH值为1时,TiO2纳米管阵列的光催化性能最好,同时随着TiO2膜使用次数的增加,其光催化效果有所下降。TiO2 nanotube arrays film are prepared in the surface of pure titanium sheet by anodic oxidation method. The method solves the immobilization of the TiO2 photocatalyst. The morphology and the crystal structure of the TiO2 nanotube arrays film are analyzed by field emission electron microscope （FESEM） and XRD.The result indicated that the diameter of nanotubes were 70-80 nm and the wall thicknesses were 5-10nm.TiO2 nanotube heated at 420℃ was entirely anatase while heated at 500℃ was anatase mixed with rutile.In photocatalysis exper- iment, methyl orange（10mg·L^-1 ）was used as the degraded agent. The effects of the initial pH value of the solution ,the crystal structure of the TiO2 nanotube arrays film, the TiO2 nanotube arrays film area and the used times of the TiO2 nanotube arrays film at the degradation rate are investigated . Results show that the TiO2 nanotube arrays film has the best photocatalysis for the methyl orange solution （pH =1 ）,while the photocatalysis of the TiO2 nanotube arrays film decreases with the increase of the used times.

关 键 词：阳极氧化 TIO2纳米管 光催化 

分 类 号：TQ203.2[化学工程—有机化工]