Molecular engineering of microporous crystals: (III) The influence of water content on the crystallization of microporous aluminophosphate AlPO4-11

	Molecular engineering of microporous crystals: (III) The influence of water content on the crystallization of microporous aluminophosphate AlPO4-11
	Zhang, Bin 1; Xu, Jun 2; Fan, Fengtao 3; Guo, Qiang 3; Tong, Xiaoqiang 1; Yan, Wenfu 1; Yu, Jihong 1; Deng, Feng 2; Li, Can 3; Xu, Ruren 1
刊名	microporous and mesoporous materials
	2012
卷号	147 期号:1 页码:212-221
关键词	Aluminophosphate AlPO4-11 AEL Crystallization Zeolite
英文摘要	the influence of water content on the crystallization of the microporous aluminophosphate alpo4-11 was investigated by a combination of in situ uv raman and ex situ xrd and nmr characterizations. under high water content conditions (al2o3:h2o = 1:20-69), an alpo4-5 intermediated formed first and later co-existed with alpo4-11. in the last stage of crystallization, the crystalline alpo4-5 completely disappeared and well-crystallized alpo4-11 was obtained. the position of the three signals observed in the p-31 mas nmr spectra of the isolated solid samples did not change during the hydrothermal treatment, suggesting that the fragments containing the p site in the junction of 6- and 4-membered rings of both alpo4-5 and alpo4-11 formed first and that the environments of the p sites were very similar to those in the final structure. a significant increase of al concentration in liquid media was observed before the appearance of xrd detectable alpo4-11. under low water content conditions (al2o3:h2o = 1:15), the alpo4-11 was directly crystallized from the initial mixture. in situ raman spectra showed that the 10-membered rings were complete by the time the transformation of octahedral al to tetrahedral al was finished and that the conformation of the protonated di-(i-propyl)amine changed little during the crystallization. the present study showed that the composition of the liquid phase is critical to the formation of a specific structure. (c) 2011 elsevier inc. all rights reserved.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, applied ; chemistry, physical ; nanoscience & nanotechnology ; materials science, multidisciplinary
研究领域[WOS]	chemistry ; science & technology - other topics ; materials science
关键词[WOS]	dry-gel conversion ; solid-state nmr ; sieve synthesis ; p-31 ; spectroscopy ; phosphates ; mechanism ; hydration ; zeolites ; aluminum
收录类别	SCI
语种	英语
WOS记录号	WOS:000295906200028
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/143114]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China 2.Chinese Acad Sci, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Bin,Xu, Jun,Fan, Fengtao,et al. Molecular engineering of microporous crystals: (III) The influence of water content on the crystallization of microporous aluminophosphate AlPO4-11[J]. microporous and mesoporous materials,2012,147(1):212-221.
APA	Zhang, Bin.,Xu, Jun.,Fan, Fengtao.,Guo, Qiang.,Tong, Xiaoqiang.,...&Xu, Ruren.(2012).Molecular engineering of microporous crystals: (III) The influence of water content on the crystallization of microporous aluminophosphate AlPO4-11.microporous and mesoporous materials,147(1),212-221.
MLA	Zhang, Bin,et al."Molecular engineering of microporous crystals: (III) The influence of water content on the crystallization of microporous aluminophosphate AlPO4-11".microporous and mesoporous materials 147.1(2012):212-221.