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	Structure evolution of aluminosilicate sol and its structure-directing effect on the synthesis of nay zeolite
	Zhao, Xiaomeng1; Liu, Rugeng1; Zhang, Heng1; Shang, Yunshan1; Song, Yu1; Liu, Chao1; Wang, Tao1; Gong, Yanjun1; Li, Zhihong2
刊名	Journal of applied crystallography
	2017-02-01
卷号	50页码:231-239
关键词	Small-angle x-ray scattering (saxs) Aluminosilicate sol structure evolution Activity to generate y crystals
ISSN号	1600-5767
DOI	10.1107/s1600576716020409
通讯作者	Gong, yanjun(gongyj@cup.edu.cn) ; Li, zhihong(lzh@ihep.ac.cn)
英文摘要	Understanding the growth behaviour of an aluminosilicate sol during ageing is necessary for the design of the sol and the synthesis of nay zeolite. herein, aluminosilicate sols with three different sio2/al2o3 ratios were prepared and aged for varying times at 293 k. the sol was then introduced as a structure-directing agent in the feedstock gel to generate nay zeolite. the structure evolution of the sol species during the ageing process was studied by in situ small-angle x-ray scattering (saxs) using synchrotron radiation. saxs data, in combination with transmission electron microscopy images, raman spectra and x-ray diffraction patterns, present a detailed description of the sol species, revealing an interplay between the fractal structure and reactivity to generate nay zeolite. the sio2/al2o3 ratios in the sol play a critical role in the structure evolution of the aluminosilicate species during the ageing, particularly with respect to their size distributions and the fractal dimensions. the species with suitable size and compactness in the sol are found to be an active precursor for achieving a highly crystalline nay zeolite. the sol with an sio2/al2o3 ratio of 20 possesses active species with a mass fractal dimension d-m of 2.0-2.6 after ageing, which leads to the formation of a well crystallized nay zeolite. however, the high-silica sol-25, with an sio2/al2o3 ratio of 25, and alumina rich sol-10, with a ratio of 10, experience growth at either slow or fast rates. in these cases the active species have smaller d-m (1.1-1.9) or larger d-m (2.6-2.8), respectively, displaying low/poor activity to generate nay zeolite. the mechanisms regulating the growth behaviour of the sols during ageing are proposed.
WOS关键词	X-RAY-SCATTERING ; SODIUM-SILICATE SOLUTIONS ; SMALL-ANGLE SCATTERING ; PARTICLE-SIZE DISTRIBUTIONS ; SAXS ANALYSIS ; Y SYNTHESIS ; SI-29 NMR ; GROWTH ; CRYSTALLIZATION ; MECHANISM
WOS研究方向	Chemistry ; Crystallography
WOS类目	Chemistry, Multidisciplinary ; Crystallography
语种	英语
出版者	INT UNION CRYSTALLOGRAPHY
WOS记录号	WOS:000394289400022
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2176816
专题	高能物理研究所
通讯作者	Gong, Yanjun; Li, Zhihong
作者单位	1.China Univ Petr, Key Lab Catalysis, State Key Lab Heavy Oil Proc, CNPC, Beijing, Peoples R China 2.Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Lab, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Xiaomeng,Liu, Rugeng,Zhang, Heng,et al. Structure evolution of aluminosilicate sol and its structure-directing effect on the synthesis of nay zeolite[J]. Journal of applied crystallography,2017,50:231-239.
APA	Zhao, Xiaomeng.,Liu, Rugeng.,Zhang, Heng.,Shang, Yunshan.,Song, Yu.,...&Li, Zhihong.(2017).Structure evolution of aluminosilicate sol and its structure-directing effect on the synthesis of nay zeolite.Journal of applied crystallography,50,231-239.
MLA	Zhao, Xiaomeng,et al."Structure evolution of aluminosilicate sol and its structure-directing effect on the synthesis of nay zeolite".Journal of applied crystallography 50(2017):231-239.

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