Preparation and Characterization of Porous Silica Obtained by Hydrochloric Acid Selective Leaching Metakaolinite

摘要：

　　Porous silica was prepared by selective leaching ofmetakaolinite with 20 mass% HCl solution.The metakaolinite was derived from the 1 ∶ 1 layered structure clay mineral kaolinite by firing at 600℃ for 24 h.The characteristics of porous silica were studied.The content of Al2O3 in metakaolinite was sharply changed from 45% to less than 2% after 2 h leaching.The maximum specific surface area of the leached sample was about 350 m2/g.The average pore size is about 2 nm.The total pore volume is 0.3 ml/g.The layer structure of kaolinite and metakaolinite is responsible for forming micropores.

关键词： Porous silica Selective leaching Metakaolinite

作者: Linjiang Wang Xiangli Xie

作者单位: Key Laboratory of New Processing Technology for Nonferrous Metal and Materials of Ministry of Educat Department of Chemistry and Engineering Materials,Guilin University of Technology,Guilin 541004,P.R.

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 342-344

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）