Phase selection controlled by sodium ions in the synthesis of FAU/LTA composite zeolite

	Phase selection controlled by sodium ions in the synthesis of FAU/LTA composite zeolite
	Hu, Linyan 1,2; Xie, Sujuan 1; Wang, Qingxia 1; Liu, Shenglin 1; Xu, Longya 1
刊名	science and technology of advanced materials
	2009-03-01
卷号	10 期号:1
关键词	FAU LTA Composite zeolite crystallization sodium concentration
英文摘要	zeolite faujasite (fau), linde type a (lta) and fau) lta composite have been synthesized using tetramethylammonium cation (tma(+)) as template, by adjusting only the concentration of na+ ions in the initial solution (1.00 al2o3 4.36 sio2 : 2.39 (tma)(2)o : beta na2o : 249.00h(2)o). na+ ions alter the phase composition of the product more than tma(+) or oh- ions. when na2o concentration [na2o] increases from 0.024 to 0.168, the product gradually changes from pure fau to pure lta via the formation of fau/lta composite with increasing lta fraction. interestingly, the induction periods of fau and lta in the fau/lta composite zeolite ([na2o] is 0.072) are both 13 h, quite different from the induction periods of their individual pure phases-45 h for fau and 4 h for lta. during the crystallization, the lta/(fau+lta) fraction in the composite zeolite decreases in a nearly linear fashion. scanning electron microscopy, thermogravimetry and differential thermal analysis indicate some difference between the properties of the fau/lta composite zeolite and of the mechanical mixture.
WOS标题词	science & technology ; technology
类目[WOS]	materials science, multidisciplinary
研究领域[WOS]	materials science
关键词[WOS]	catalytic performance ; zsm-5/y composite ; y nanocrystals ; nmr-spectra ; fau ; lta ; thermochemistry
收录类别	SCI
语种	英语
WOS记录号	WOS:000268313400017
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/141348]
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.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Hu, Linyan,Xie, Sujuan,Wang, Qingxia,et al. Phase selection controlled by sodium ions in the synthesis of FAU/LTA composite zeolite[J]. science and technology of advanced materials,2009,10(1).
APA	Hu, Linyan,Xie, Sujuan,Wang, Qingxia,Liu, Shenglin,&Xu, Longya.(2009).Phase selection controlled by sodium ions in the synthesis of FAU/LTA composite zeolite.science and technology of advanced materials,10(1).
MLA	Hu, Linyan,et al."Phase selection controlled by sodium ions in the synthesis of FAU/LTA composite zeolite".science and technology of advanced materials 10.1(2009).