铌掺杂二氧化钛介孔分子筛的合成及其光催化活性研究

Synthesis and Study on the Photocatalytic Properties of Niobium Doped Mesoporous Titanium Deoxide

以十六烷基三甲基胺为模板剂,钛酸正四丁酯为钛前驱体,草酸铌为铌的前驱体,用溶胶-凝胶手段,将铌元素引入到介孔二氧化钛体系中,制备出了介孔Nb2O5-TiO2复合氧化物。采用XRD、IR等表征手段对其进行表征,并以苯酚为目标降解物进行了光催化反应活性测试。结果表明:少量铌能进入TiO2骨架,样品保持介孔结构,当铌量进一步增加时,介孔结构遭到破坏;铌的掺杂并不能使介孔TiO2分子筛的光催化活性提高。

Mesoporous Nb20s-TiO2 was synthesized via a combined sol - gel process with surfactant- assisted templating method. hexadecyhrimethylammonium bromide（CTAB） as template, Ti（OC4 H9）4 and oxalic acid niobium as predecessor, The resulting products were characterized by XRD, FT-IR, The results showed that The samples remained mesoporous structure, when niobium was doped into TiO2 framework. With the increased amount of niobium, mesoporou structure was destroyed. According to the photocatalytic activity test, we conclude that potocatalytic activity.