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学科主题: 物理化学
题名: Synthesis and characterization of DNL-6, a new silicoaluminophosphate molecular sieve with the RHO framework
作者: Su, Xiong1, 2, 3;  Tian, Peng1, 2;  Li, Jinzhe1, 2;  Zhang, Ying1, 2;  Meng, Shuanghe1, 2;  He, Yanli1, 2;  Fan, Dong1, 2, 3;  Liu, Zhongmin1, 2
通讯作者: 刘中民
关键词: SAPO ;  RHO ;  Synthesis ;  DNL-6 ;  Crystallization mechanism
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2011-10-01
DOI: 10.1016/j.micromeso.2011.04.004
卷: 144, 期:1-3, 页:113-119
收录类别: SCI ;  ISTP
文章类型: Article
部门归属: DNL12
项目归属: DNL12
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
摘要: Synthesis and characterization of DNL-6, a new silicoaluminophosphate molecular sieve with the RHO framework
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: A new silicoaluminophosphate molecular sieve with the RHO framework (designated as DNL-6, Dalian National Laboratory Number 6) has been hydrothermally synthesized for the first time with diethylamine (DEA) template in the presence of cetyltrimethylammonium bromide (CTAB). Influence factors, such as CTAB amount and silica content in the starting gel, crystallization time and temperature, were investigated. It was observed that DEA together with CTAB were necessary for the formation of pure RHO phase, which appeared in a narrow range of the starting gel compositions and synthesis conditions. Only DEA and water molecules were found in the as-synthesized DNL-6 without any existence of CTAB. All Si atoms incorporated into the framework with Si(4Al) environment at a high amount close to the theoretical maximum value. DNL-6 molecular sieve possessed high micropore surface area (777 m(2)/g) and large micropore volume (0.36 cm(3)/g) with good thermal and hydrothermal stability. Crystallization course was studied by monitoring solid products at different crystallization times with XRD, SEM, XRF, NMR and CHN elemental analysis. It is proposed that DNL-6 crystals were more likely formed directly from the crystallization of liquid phase rather than from the transformation of amorphous materials, and Si atoms directly incorporated into the DNL-6 framework from the very beginning of the crystallization via a SM2 mechanism. (C) 2011 Elsevier Inc. All rights reserved.
关键词[WOS]: CRYSTALLINE INORGANIC SOLIDS ;  ZEOLITE RHO ;  NMR-SPECTROSCOPY ;  STATE NMR ;  ALUMINOPHOSPHATE ;  TEMPLATE ;  SAPO-34 ;  CATION
语种: 英语
WOS记录号: WOS:000293435400015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/115840
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, Dalian, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Natl Engn Lab Methanol Olefins, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Su, Xiong,Tian, Peng,Li, Jinzhe,et al. Synthesis and characterization of DNL-6, a new silicoaluminophosphate molecular sieve with the RHO framework[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2011,144(1-3):113-119.
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