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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。
The TiO2 nanotubes were synthesized by hydrothermal method and reacted with absolute ethanol solution of zinc acetate under alkaline conditions to obtain ZnO / TNTs loaded with ZnO on the surface. The effects of UV irradiation on the composite nanotubes Photocatalytic Degradation of Rhodamine. The synthesized materials were characterized by TEM, EDS, XRD, BET and UV-Vis. The results show that the diameter of TiO2 nanotube is about 5 ~ 10nm and the length of the tube is about 0.1 ~ 1μm. The structure of the nanotube does not change obviously after ZnO surface modification, and the ZnO particles have a hexagonal wurtzite structure uniformly dispersed in the nanometer The outer diameter of the tube was about 6 nm. The spectral analysis showed that the absorption spectra of ZnO / TNTs were red-shifted significantly. The photocatalytic activity of ZnO / TNTs was better than that of anatase TiO2, ZnO nanopowder and TiO2 nanotube A significant increase, and good photocatalytic repeatability.