摘要
使用含Al3+ 的Keggen离子制备了无机插层柱撑蒙脱石 ,并运用2 7Al核磁共振谱等技术对柱化溶液中的Al的状态进行了研究 ,运用X射线定向衍射技术、红外光谱、差热、热重分析及原子力显微镜等技术对柱化黏土中Keggin结构的作用及热稳定性进行了研究。结果表明 ,AlCl3溶液在 [OH- ] /[Al3+ ] =2 .4时水解生成的Keggin离子最多。柱撑蒙脱石层间距在自然状态下为 2 .53nm ,30 0℃灼烧后层间距稳定在 1 .83nm 。
The pillared montmorillonite was prepared by Al3+ in ions with Keggin structure. 27Al NMR was used to monitor the environment of Al3+ in solution. The thermal stability of pillared clays was determined by XRD, IR, DTA, TG and AFM. The results show that it will get the maximum quantity of Keggin ions in AlCl3 solution when [OH]-/[Al3+]=2.4. The d(001) value of pillared montmorillonite is 2.53 nm in a natural state, and the basal interlayer spacing is stabilized at 1.83 nm after incandescing at 300°C, with high thermal stability.
出处
《现代化工》
EI
CAS
CSCD
北大核心
2003年第7期34-36,40,共4页
Modern Chemical Industry
基金
国家自然科学基金 (40 2 0 2 0 0 7)
广东省自然科学基金 (0 0 0 62 3
0 2 0 938)资助项目
