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题名: Synthesis of MCM-41 type materials with remarkable hydrothermal stability from UTM-1
作者: Liu, Ziyu;  Wei, Yingxu;  Qi, Yue;  Zhang, Shigang;  Zhang, Ying;  Liu, Zhongmin
通讯作者: 刘中民
关键词: UTM-1 ;  post-synthetic treatment ;  pH adjusting ;  mesoporous ;  hydrothermal stability
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2006-07-28
DOI: 10.1016/j.micromeso.2006.02.016
卷: 93, 期:1-3, 页:205-211
收录类别: SCI
文章类型: Article
部门归属: 8
项目归属: 803
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
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: A microporous zeolite UTM-1 was prepared and transferred to MCM-41 type materials by refluxing with surfactant at the presence of NaOH and by a subsequent pH adjusting process. The pH value affected the long-range order of these mesostructures greatly, and MCM-41 type products were obtained at pH = 7 and pH = 5 (designated as MS-7 and MS-5, respectively). The as-synthesized MS-7 showed smaller particle sizes (about 500 nm) and cylindrical pores. MS-7 showed a high BET specific surface area of 1003 m(2)/g and a high pore volume of 1.20 cm(3)/g after calcination at 823 K as well as two pore size distributions centred at 2.4 and 3.7 nm, respectively. The calcined MS-7 exhibited remarkable hydrothermal stability. After being treated in boiling water for 312 h, the material remained a high BET specific surface area of 922 m(2)/g and a high pore volume of 1.08 cm(3)/g without degrading its well-ordered mesostructure. Compared with MS-7, the 823 K calcined MCM-41 showed poor hydrothermal stability and preserved only a BET specific surface area of 150 m(2)/g and a pore volume of 0.35 cm(3)/g upon being treated in boiling water for 24 h. The remarkable hydrothermal stability of MS-7 was ascribed by solid-state NMR results to the presence of higher percentage of 4-fold coordinated Al species and the highly polymerized pore walls. (c) 2006 Elsevier Inc. All rights reserved.
关键词[WOS]: MESOPOROUS MOLECULAR-SIEVES ;  ORDERED HEXAGONAL STRUCTURE ;  TRIBLOCK COPOLYMER ;  ACIDIC MEDIA ;  SILICA ;  ALUMINOSILICATES ;  CATALYSIS ;  IMPROVEMENT ;  MECHANISM ;  FRAMEWORK
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000239252700025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/93889
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, Appl Catalysis Lab, Dalian 116023, Peoples R China

Recommended Citation:
Liu, Ziyu,Wei, Yingxu,Qi, Yue,et al. Synthesis of MCM-41 type materials with remarkable hydrothermal stability from UTM-1[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2006,93(1-3):205-211.
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