摘要
以有机胺为碱源合成出硅铝介孔分子筛ＭＣＭ－４１， 并将合成产物的性能与采用传统方法（以氢氧化钠为碱源）合成的产物进行了对比． 所合成产物经焙烧脱除有机表面活性剂后即为氢型． ＸＲＤ和ＴＥＭ 结果表明， 所合成的产物骨架具有很高的有序度． 固体核磁共振结果显示， 铝原子以四配位的形式存在于样品的原粉中． 经过高温焙烧， 有少量骨架铝脱出骨架， 转变成六配位形式．
Incorporation of aluminum into MCM\|41 framework was achieved in an alkali\|free system, by using diethylamine as the base source. The properties of the product are compared with those of the samples obtained with NaOH. XRD and TEM results show that the resulted material is highly ordered. \{\}\+\{27\}Al MAS NMR experiment indicates that aluminum atoms are present with a 4\|coordinated form in the as\|synthesized samples. Upon calcination, a small amount of Al was removed from the framework, as indicated by a small peak characteristic of 6\|coordinated Al in the NMR profile. The surface acidity of the calcined samples were studied with Py\|IR technique.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第10期1495-1498,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
教育部博士点基金
吉林大学无机合成与制备化学开放实验室资助课题
关键词
氢型
MCM-41
合成
分子筛
催化剂
介孔
H\|form MCM\|41, Synthesis, Organic weak base, Surface acidity
