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SAPO-5,-11和-34分子筛模板剂的脱除及其结构的热致变化
Department非现建制
肖天存; 安立敦; 王弘立
1994
Source Publication分子催化
ISSN1001-3555
Volume8Issue:6Pages:429-436
Abstract用水热法合成了SAPO-5, -11和-34硅磷酸铝类分子筛。并对经不同温度焙烧处理的样品进行表征,结果表明:分子筛中模块剂的热分解过程与其结构和孔大小有较大的关系。在SAPO-5和SAPO-34分子筛中,外部联接的T-O-T键的反对称伸缩振动峰(1240 cm-1-1038 cm-1)和其对称伸缩振动(734 cm-1-600 cm-1)及双环的变形振动(600-500 cm-1)的吸收峰对样品的结晶度比较敏感。但在SAPO-11中,分子筛骨架中T-O-T反对称伸缩振动(1225 cm-1和1038 cm-1)随结晶度的下降而基本保持不变,但内四面体(TO4)的对称伸缩振动,反对称伸缩振动峰及T-O弯曲振动峰随样品焙烧温度的升高而减弱并分裂。红外吸收带向低频方向移动。SEM-EDAX结果表明:随样品焙烧温度的升高,结晶度下降,分子筛晶形变得不规则,晶面越来越粗糙,但结晶度的下降并非由于其中PO4四面体的热分解所引起,而是由外部联结的T-O-T键的断裂,双环被破坏及骨架元素间的重排所引起。
Keyword热稳定性 Sapo-5 结构变化 -11 红外谱 -34分子筛 热分析 Thermal Treatment Sapo-5 Structure Change -11 And -34 Infrared Spectra Tg-dta
Subject Area物理化学
Funding Organization甘肃省青年科学基金资助课题
Language中文
Document Type期刊论文
Identifierhttp://ir.licp.cn/handle/362003/7264
Collection非现建制
Corresponding Author安立敦
Recommended Citation
GB/T 7714
肖天存,安立敦,王弘立. SAPO-5,-11和-34分子筛模板剂的脱除及其结构的热致变化[J]. 分子催化,1994,8(6):429-436.
APA 肖天存,安立敦,&王弘立.(1994).SAPO-5,-11和-34分子筛模板剂的脱除及其结构的热致变化.分子催化,8(6),429-436.
MLA 肖天存,et al."SAPO-5,-11和-34分子筛模板剂的脱除及其结构的热致变化".分子催化 8.6(1994):429-436.
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