Nanoscale layered K2Ti4O9 was prepared by solid-state method using nanosca le TiO2 with average particle size of 20 nm as the raw material. The obtained na noscale K2Ti4O9 was further used as the host material for the preparation of Al2 O3 pillared K2Ti4O9 and the K2Ti4O9 was undergone H+-exchange, alkylamine-pre-ex pansion, Keggin-pillaring and heat-treatment. The products were characterized by XRD, TEM and BET methods. The interlayer distance of K2Ti4O9 was expanded step by step during the pillaring procedure and the Al2O3 pillared H2Ti4O9 with narro w pore-size distribution and high surface area (212.8 m2·g-1) was obtained.
A new stearic acid method(SAM) has been used to prepare ultrafine K2La2Ti3O10 nanocrystalline. Each state of synthesis process was followed by the use of FT IR analysis. The resulting materials have been characterized by means of XRD, TEM, BET surface area analysis. The acid exchanging property of the obtained product was also studied. The experimental results showed that comparing with the product of traditional solid state reaction, the particle size of the K2La2Ti3O10 synthesized by SAM is greatly reduced, BET surface area is high(more than 11.83m2· g- 1) and has different acid exchanging properties. It can be easily exfoliated in 2mol· L- 1 HNO3 solution.
