无机材料学报

• 研究论文 • 上一篇    下一篇

低表面活性剂/硅比率中有序介孔材料的合成

禹剑; 王连洲; 施剑林; 阮美玲; 严东生   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室, 上海 200050
  • 收稿日期:1999-01-21 修回日期:1999-02-08 出版日期:2000-02-20 网络出版日期:2000-02-20

Synthesis of Ordered Mesoporous Aluminosilicate under a Low Surfactant/Silica Molar Ratio Condition

YU Jian; WANG Lian-Zhou; SHI Jian-Lin; Ruan Met-Ling; YAN Dong-Sheng   

  1. State Key Lab of High Performance Ceramics and Superfine Microstructure; Shanghai institute ofCeramics; Chinese Academy of Sciencs; Shanghai 200050; China
  • Received:1999-01-21 Revised:1999-02-08 Published:2000-02-20 Online:2000-02-20

摘要: 以AlCl.6HO为铝源,在低表面活性剂/硅摩尔比(0.12)的体系中,合成Si/Al比在16~64范围内变化的有序介孔硅酸铝材料.用XRD、TEM、FTIR及氮吸附等测试手段对材料进行了分析.当NaOH/Si比从0.2增加到0.6时,获得的有序介孔材料结构将由六角相(MCM-41)变成立方相(MCM-48)当材料中铝含量超过一定值时,有序介孔材料品质下降.XRD分析表明,用铝原子取代硅原子将导致晶格增大.

关键词: 介孔, 硅酸铝, 表征

Abstract: Ordered mesoporous aluminosilicate materials with atomic Si/Al ratios of 16--64 were synthesized at a
very low molar ratio of surfactant/silica (0.12) by using aluminium chloride hexahydrate and TEOS as the sources of aluminium and silicon. The resulting
materials were characterized by XRD, TEM, FTIR and nitrogen sorption. As the NaOH/Si molar ratio increases from 0.2 to 0.6, the products obtained change
from hexagonal MCM-41 to cubic MCM-48. The quality of the product rapidly deteriorates as the aluminium content of the solid increases beyond a certain
limit. XRD shows that the substitution of the silicon by the large aluminium atoms leads to the expansion of the unit cell.

Key words: mesoporous, aluminosilicate, charaterization

中图分类号: