Influence of the nature of amino acids on the formation of mesoporous LTA-type zeolite.

	Influence of the nature of amino acids on the formation of mesoporous LTA-type zeolite.
	Zhang, Jian ; Hong, Mei; Cai, Feiyan ; Zheng, Hairong ; Zheng, Guangchao ; Wang, Yanding ; Chen, Zhuwen
刊名	MICROPOROUS AND MESOPOROUS MATERIALS
	2017
文献子类	期刊论文
英文摘要	Hydrothermal crystallization of LTA zeolite has been conducted in the presence of amino acid in order to introduce mesoporosity. Eight different types of proteinogenic amino acids have been employed. The influence of their structure and physicochemical properties on the formation of hierarchically mesoporous LTA (MLTA) zeolite have been investigated. All eight amino acids bearing either basic, or acidic, or polar non-ionizable, or non-polar non-ionizable side chains were able to generate mesopores within LTA crystals. The isoelectric points of amino acids influenced the resulting MLTA's morphology, crystallization kinetics, and impurity content. Pure phase MLTA with controllable shape was obtained. Amino acid with a higher isoelectric point generated smaller and more spherical MLTA in less crystallization time, but induced slightly more impurity FAU phase. The mesopore size generally decreased with hydropathy index so that amino acids with non-polar, non-ionizable side groups generated 14-15 nm mesopores, 5 10 nm smaller than those generated by amino acids in other categories. The hydrophobic moieties in amino acids tended to shrink the mesopores, in contrast with their pore expansion effect in surfactant mediated mesopore generation route, suggesting a different mesopore formation mechanism. Stability of amino acid during the hydrothermal zeolite synthesis and easy amino acid removal by washing with water was further confirmed. The findings discovered in this study paves a new way for tailoring hierarchical zeolite materials with controlled texture properties. (C) 2017 Elsevier Inc. All rights reserved.
URL标识	查看原文
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/12080]
专题	深圳先进技术研究院_医工所
作者单位	MICROPOROUS AND MESOPOROUS MATERIALS
推荐引用方式 GB/T 7714	Zhang, Jian , Hong, Mei, Cai, Feiyan ,et al. Influence of the nature of amino acids on the formation of mesoporous LTA-type zeolite.[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2017.
APA	Zhang, Jian ., Hong, Mei., Cai, Feiyan ., Zheng, Hairong ., Zheng, Guangchao .,...& Chen, Zhuwen .(2017).Influence of the nature of amino acids on the formation of mesoporous LTA-type zeolite..MICROPOROUS AND MESOPOROUS MATERIALS.
MLA	Zhang, Jian ,et al."Influence of the nature of amino acids on the formation of mesoporous LTA-type zeolite.".MICROPOROUS AND MESOPOROUS MATERIALS (2017).