La-Al柱撑蒙脱石的超声制备及热稳定性研究  

Preparation and Thermal Stability of La-Al Pillared Montmorillonite Prepared by Power Ultrasonic Treatment

作　　者：丁述理[1] 彭苏萍[1] 刘钦甫[1] 

机构地区：[1]中国矿业大学资源与安全工程学院

出　　处：《中国矿业大学学报》2003年第5期496-499,共4页Journal of China University of Mining & Technology

基　　金：国家自然科学基金(40072018);河北省自然科学基金(499330);教育部优秀青年教师基金

摘　　要：在功率超声作用下,用氯化铝与硝酸镧合成的柱撑溶液与蒙脱石反应制备了La-Al柱撑蒙脱石,制备La-Al柱撑蒙脱石柱撑溶液中的OH/Al比为2.4,La/Al比为1/20,结果表明,所制备的柱撑蒙脱石具有2.65nm的层面间距,在低于650℃的条件下柱撑结构相当稳定,La-Al柱撑蒙脱石大的层面间距和高的热稳定性与进入蒙脱石层间的Johansson离子含La有关。La-Al pillared montmorillonite was prepared by reacting montmorillonite mixture of aluminum chlorohydrate and lanthanum nitrate under power ultrasonic treatment with the input power of 250 W and the frequency of 20. 0 kHz. The pillaring solution for forming La-Al montmorillonite has an OH/A1 ratio of 2. 4, and a La/Al ratio of 1/20. The La-Al pillared montmorillonite is characterized by basal spacing of about 2. 65 nm, and its pillared structure is stable at a temprature lower than 650℃. The large spacing and high thermal stability of La-Al pillared montmorillonite is related to the formation of La-bearing Johansson cations intercalated into montmorillonite under the power ultrasonic treatment.

关 键 词：La—Al柱撑蒙脱石 热稳定性 超声制备 氯化铝 硝酸镧 粘土矿物 功率超声 

分 类 号：P578.967[天文地球—矿物学]