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学科主题: 物理化学
题名: Multinuclear Solid-State NMR Studies on the Formation Mechanism of Aluminophosphate Molecular Sieves in Ionic Liquids
作者: Xu, Renshun1;  Zhang, Weiping2;  Xu, Jun3;  Tian, Zhijian1;  Deng, Feng3;  Han, Xiuwen1;  Bao, Xinhe1
通讯作者: 张维萍 ;  包信和
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2013-03-21
DOI: 10.1021/jp400422z
卷: 117, 期:11, 页:5848-5854
收录类别: SCI
合作性质: 
文章类型: Article
部门归属: 5,DNL08
项目归属: 502,DNL0802
产权排名: 待补充
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
资助者: 1,1
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: In the present work, multinuclear solid-state NMR techniques together with power X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to monitor the crystallization process of aluminophosphate AlPO4-11 molecular sieves in 1-ethyl-3-methylimidazolium bromide ([emim]Br) ionic liquids (LLs). The local environments of the selected solid samples were probed by one-dimensional Al-27, P-31, and F-19 MAS NMR experiments, and more information was obtained from two-dimensional Al-27 -> P-31 heteronuclear correlation (HETCOR) and Al-27 triple-quantum MAS (3QMAS) experiments. It is found that a large amount of amorphous aluminophosphates was formed with the F-Al-oct-O-P-par and Al-tet-O-P-par structures in the initial stage of aging. With increasing crystallization time, the partially condensed framework phosphorus species disappeared gradually and became fully condensed. Meanwhile, the octahedral Al was transformed into the pentahedra] and tetrahedral Al species with the structures of F-Al-penta-O-P-ful and Al-tet-O-P-ful in the AlPO4-11 frameworks. During the crystallization process, [emim] cations acting as the structure-directing agents were occluded into the channels, and F- anions were connected with pentahedral Al in the final AlPO4-11 phase. All of these findings can allow proposing a possible formation mechanism for the synthesis of AlPO4-11 in ionic liquids.
关键词[WOS]: IONOTHERMAL SYNTHESIS ;  ZEOLITE ;  FRAMEWORKS ;  SPECTROSCOPY ;  INSIGHTS ;  PHASES ;  SYSTEM ;  AMINES
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000316773000039
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/119310
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China
3.Chinese Acad Sci, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan Ctr Magnet Resonance, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China

Recommended Citation:
Xu, Renshun,Zhang, Weiping,Xu, Jun,et al. Multinuclear Solid-State NMR Studies on the Formation Mechanism of Aluminophosphate Molecular Sieves in Ionic Liquids[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2013,117(11):5848-5854.
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