【摘要】 采用分步离子交换法 ,将含钛多聚阳离子嵌入层状镧铌酸 (HLaNb2 O7)的层间 ,通过焙烧 ,制得TiO2 柱层状镧铌酸(TiO2 HLaNb2 O7) .应用XRD ,FTIR ,TEM和BET (Brunauer Emmett Teller)等技术对该材料进行了表征 .结果表明 ,TiO2 HLaNb2 O7具有较大的层间距 (1 61nm ,45 0℃ )和较高的比表面积 (SBET=13 2m2 ·g-1) ,而且是一中孔材料 ,其孔径分布曲线上呈现一狭窄的孔分布 ,最可几孔直径为 3 3nm .更多还原

【Abstract】 Ti(Ⅳ) polycation-intercalated layered HLaNb 2O 7 has been prepared by the intercalation of n -hexylamine into the interlayers 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-Teller) techniques were used to characterize the resultant. The results showed that the titania-pillared HLaNb 2O 7 had an interlayer distance of 1 61 nm (450 ℃), a specific surface area of 132 m 2·g -1 and a narrow pore-size distribution centered at 3 3 nm.更多还原