关键词: 氧化钛, 镧铌酸, 离子交换法, 焙烧, X射线光电子谱法, 傅里叶变换, 红外分光光度法, 透射电子显微术, 孔径分布, 表征

Ti( F ) polycation-intercalated layered HLaNbaO? has been prepared by the intercalation of n-hexylamine into the interlayera of HLaNb_2O_7 followed by replacing hexylammonium with n-dodecylammonium and further with Ti (IV) polycation species. Titania-pillared layered HLaNb_2O_7 was obtained by calcining the Ti(IV) polycation- intercalated HLaNb_2O_7 at 450 ℃ in air. XRD, FTIR, TEM and BET (Brunauer-Emmett-TeUer) techniques were used to characterize the resultant. The results showed that the titania-pillared HLaNb2O7 had an interlayer distance of 1.61 nm (450 V.), a specific surface area of 132 m~2·g~(-1) and a narrow pore-size distribution centered at 3.3 nm.

Key words: TITANIUM OXIDE, layered lanthanum niobic acid, ION EXCHANGE PROCESS, ROASTING, XPS, FT, IR, TEM, PORE SIZE DISTRIBUTION, CHARACTERIZATION