摘要
分别以NH_4Y及ZSM-5为原料,(NH_4)_2TiF_6、(NH_4)_3FeF_6为取代剂,进行液-固相类质同晶取代反应,并用XRD、IR、ESR、M(?)ssbauer谱等一系列方法进行了表征,结果发现:Ti进入了Y型及ZSM-S沸石骨架;Fe只进入了Y型沸石骨架,而没能进入ZSM-5沸石骨架,Fe、Ti杂原子进入沸石后,其晶胞参数增大,红外对称和反对称伸缩振动的频率向低频移动。
In this paper, the substitution of Ti and Fe into zeolite Y and ZSM- 5 in aqueous solution of (NH4)2TiF6、(NH4)3FeF6is investigated respectively. A series of measurements including XRD、IR、ESR and Mossbauer spectra have been taken. It is found that Ti atoms insert into the framework of zeolite Y and ZSM- 5, while Fe atoms insert into only the framework of zeolite Y but not the framework of ZSM-5 zeolite. The incorporation of Ti and Fe into zeolites leads to an increase in the unit cell parameter and red shifts of the symmetric and asymmetric stretch vibration frequencies.
出处
《分子催化》
EI
CAS
CSCD
1992年第5期365-370,共6页
Journal of Molecular Catalysis(China)
基金
国家自然科学基金资助项目
关键词
沸石
催化剂
合成
Isomorphous substitution, Zeolite Y, Zeolite ZSM-5.
