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以金红石相二氧化钛(TiO2)粉体为原料,采用水热法合成了二氧化钛纳米管(TNTs),在碱性条件下与AgNO3的乙二醇溶液反应,得到表面载Ag的二氧化钛纳米管(Ag/TNTs).利用透射电镜(TEM)、电子衍射能谱(EDS)、X射线衍射(XRD)、X射线光电子能谱(XPS)和紫外-可见光谱(UV-Vis)对产物进行了表征,重点研究了Ag/TNTs对甲基橙(MO)紫外光催化降解性能.结果表明,经Ag表面修饰后,纳米管的晶型结构没有发生明显变化,并且Ag粒子能很好地分散在纳米管的外表面.Ag粒子的直径约为4nm,以单质Ag的形态存在.Ag/TNTs在可见光区域表现出较强的吸收,光催化降解甲基橙实验结果表明,Ag/TNTs的光催化活性较金红石相二氧化钛粉体和纯TNTs有着显著的提高.
Titanium dioxide nanotubes (TNTs) were synthesized by hydrothermal method in the presence of titanium dioxide (TiO2) as raw material, and reacted with ethylene glycol solution of AgNO3 under alkaline conditions to obtain titania nanotubes with Ag / TNTs) .The products were characterized by TEM, EDS, XRD, XPS and UV-Vis, The photocatalytic degradation of methyl orange (MO) by Ag / TNTs was studied. The results showed that the crystal structure of the nanotubes did not change significantly after Ag modification, and the Ag particles were well dispersed in the nanotubes The Ag particles have a diameter of about 4 nm and exist in the form of simple Ag.Ag / TNTs show strong absorption in the visible region and the photocatalytic degradation of methyl orange shows that the photocatalytic activity of Ag / TNTs is higher than that of rutile Phase II titanium dioxide powder and pure TNTs have significantly improved.