高比表面钛铌复合氧化物的制备

Preparation of Titanoniobium Complex Oxides with High Specific Surface Area

通过先用长链有机胺预支撑层状钛铌酸,然后与含Ti4+的聚合阳离子进行交换反应,再经高温焙烧后制备出高比表面的钛铌复合氧化物,其比表面积达80～100m2·g-1。孔径分布测试结果表明,这是一类以中孔为主的新型多孔材料。

By using long chain alkylamine (alkyl=ndecyl, noctyl) to prop up the layered titanoniobate first, then exchanging with the solution containing titanium hydroxopolycation, followed by calcining the obtained precursor in air at 450 ℃, two titanoniobium complex oxides with a high specific surface area were prepared. The results of nitrogen adsorptiondesorption indicate that the resultant materials are porous with a BET specific surface area of 80～100 m2·g-1, and the poresize distributions are mainly concentrated within the mesopore range.