TiO_2/ZnO纳米管的制备及其光催化性能  

Preparation of TiO_2/ZnO Nanotubes and Their Photocatalytic Activity

作　　者：杨硕[1] 尹荔松[2] 阳素玉[2] 龚青[2] 

机构地区：[1]中国船舶重工集团公司第七二五研究所,洛阳471039 [2]中南大学物理科学与技术学院,长沙410083

出　　处：《纳米技术与精密工程》2011年第4期322-328,共7页Nanotechnology and Precision Engineering

基　　金：中国博士后基金资助项目(20060390878)

摘　　要：采用电化学阳极氧化法制备了高度有序的TiO2纳米管阵列,并利用纳米管的光致超亲水特性,采用斜面毛细组装技术在无定形TiO2表面自组装ZnO溶胶后退火制备了TiO2/ZnO复合纳米管.探讨了阳极氧化各参数对纳米管形貌的影响.利用X射线衍射仪(XRD)、场发射扫描电子显微镜(FE-SEM)等方法对样品的结构和形貌进行了表征.以有机磷农药氯胺磷为光催化降解对象,研究了焙烧温度、管径、管长和TiO2/ZnO复合比例等因素对降解效果的影响.结果表明,焙烧温度、管径以及ZnO复合比例对光催化降解率影响较大.对于管径97 nm、管长315.8nm的TiO2/ZnO纳米管,ZnO最佳复合比例为4.2%(质量分数),5 h后降解率达到78%.Highly ordered TiO2 nanotube arrays were prepared by electrochemical anodization and TiO2/ZnO nanotube arrays were also fabricated by slope capillary assembly technique with ZnO sol self-assembly on the surface of amorphous TiO2 due to super-hydrophilic properties of nanotubes.The impact of anodizing parameters on the morphology of nanotubes was discussed and the structure and shape of samples were characterized by X-ray diffractometer（XRD） and field emission scanning electron microscope（FE-SEM）.The photocatalytic degradation activities of chloramine phosphorus were evaluated by analyzing the influence of annealing temperature,the diameter of tube,the length of tube and composite ratio of TiO2/ZnO on photocatalytic degradation.The results show that annealing temperature,the diameter of tube and composite ratio of ZnO are the main factors.As for TiO2/ZnO nanotubes with the diameter of 97 nm and the length of 315.8 nm,the best composite ratio of TiO2/ZnO is 4.2%（mass fraction） and the degradation rate achieves 78% after 5 h.

关 键 词：TiO2/ZnO纳米管 阳极氧化 毛细组装技术 光催化 氯胺磷 

分 类 号：TB383.1[一般工业技术—材料科学与工程]