摘要
采用水热法合成TiO2纳米管,在碱性条件下与乙酸锌的无水乙醇溶液反应,得到表面负载ZnO的TiO2复合纳米管（ZnO/TNTs）,并研究了复合纳米管在紫外光照射下对罗丹明B的光催化降解性能。通过透射电镜（TEM）、电子衍射能谱（EDS）、X射线衍射（XRD）、比表面积（BET）和紫外-可见光谱（UV-Vis）对所合成的材料进行了表征。结果表明,TiO2纳米管管径约5~10nm,管长约0.1~1μm;经ZnO表面修饰后,纳米管的结构没有发生明显变化,且ZnO粒子呈六方晶系纤锌矿结构均匀分散在纳米管的外表面,粒径约为6nm;光谱分析表明,ZnO/TNTs的吸收光谱有明显红移;且ZnO/TNTs的光催化活性较锐钛矿型TiO2纳米粉末、ZnO纳米粉末和TiO2纳米管有显著提高,且其光催化性能重复性好。
Titania nanotubes were prepared via solution chemistry method.The ZnO loaded titania nanotubes（ZnO/TNTs） were obtained by chemical deposition method with the TNTs suspending in the zinc acetate solution.The photocatalytic performance of the ZnO/TNTs was investigated by UV-light induced photocatalytic decomposition of rhodamine B.The characterizations of the as-synthesized samples were performed by TEM,EDS,XRD,BET and UV-vis spectra.The results showed that the diameters of the nanotubes were about 5~10nm and the length range from approximately 0.1μm to 1μm.Both the shape and the crystalline of the nanotubes were not changed after modification.ZnO-loaded nanoparticles were hexagonal wurtzite with an average size of about 6nm,which distributed on the surfaces of TNTs evenly.The nanocomposites were found to show a apparent red shift.The nanocomposites had good reproducibility and the photocatalytic activity under UV-light irradiation was superior over that of the anatase-phase TiO2 nanoparticles,ZnO nanoparticles and titanate nanotubes.
出处
《化工新型材料》
CAS
CSCD
北大核心
2010年第8期84-87,共4页
New Chemical Materials
基金
湖南省科委立项项目(2008sk4032)
关键词
TIO2纳米管
ZNO
水热法
光催化
titanate nanotube
zinc oxide
hydrothermal method
photocatalysis
