摘要
采用硬脂酸法制备了超细层状镧钛酸钾K2La2Ti3O10。通过XRD、TEM等测试技术对产物进行表征;利用FTIR对反应历程进行初步探讨;初步研究了K2La2Ti3O10的酸交换性质。结果表明,与传统高温固相反应法相比,该法使反应温度大大降低(300℃),产物颗粒尺寸减小(350nm×300nm)、比表面积增大1183m2/g;而且所得产物在HNO3溶液中即可剥离,剥离后的单片层自行卷曲成纳米管(20nm×100nm)。
A “soft chemistry” method was adopted to prepare ultrafine particles of K 2 La 2 Ti 3 O 10 . The synthesis process was monitored by FT IR analysis. The product obtained was characterized by means of XRD, TEM, BET surface area analysis and tested for its acid exchanging property. Compared with the traditional solid state method, the results show that this method lower the reaction temperature(from 1 100 ℃ to 800 ℃) and is time saving (11 h to 2 h). K 2 La 2 Ti 3 O 10 with the particle size from several micron to 350 nm× 300 nm and BET surface area more than 11 83 m 2 /g could be obtained. It can be easily exfoliated in a 2 mol/L HNO 3 solution, and the exfoliated monodisperse sheets could scroll to 20 nm×100 nm nanotubes automatically.
出处
《应用化学》
CAS
CSCD
北大核心
2005年第1期63-66,共4页
Chinese Journal of Applied Chemistry
基金
江苏省自然科学基金资助项目(BK2002100)
江苏省博士创新计划项目资助
关键词
软化学法
K2La2Ti3O10
酸交换
剥离
soft chemistry” method,layered lanthanum titanate,H-exchanging,exfoliation
