中国科学院大连化学物理研究所机构知识库
Advanced  
DICP OpenIR  > 中国科学院大连化学物理研究所  > 期刊论文
题名: Direct observation of the mesopores in ZSM-5 zeolites with hierarchical porous structures by laser-hyperpolarized Xe-129 NMR
作者: Liu, Yong1;  Zhang, Weiping1;  Liu, Zhicheng2;  Xu, Shutao1;  Wang, Yangdong2;  Xie, Zaiku2;  Han, Xiuwen1;  Bao, Xinhe1
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2008-10-02
DOI: 10.1021/jp802813x
卷: 112, 期:39, 页:15375-15381
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: Mesopore-modified ZSM-5 zeolites with hierarchical porous structures (Meso-ZSM-5) have been synthesized by using tetrapropylammonium hydroxide and starch as cotemplates. One- and two-dimensional Xe-129 NMR spectroscopy has been employed to study the porosity under the continuous flow of laser-hyperpolarized xenon gas. Besides the micropores, the mesoporous domains in Meso-ZSM-5 zeolites are directly observed by variable-temperature experiments. Combining with nitrogen adsorption, the influence of the Si/Al ratios on the mesopores in Meso-ZSM-5 is also investigated. The exchange of Xe atoms in different types of pores is very fast at ambient temperature. Two-dimensional exchange spectroscopy (EXSY) is used for the first time to monitor such an exchange process, and the results indicate that even at very low temperature Xe atoms still undergo much faster exchange between mesopores and micropores in Meso-ZSM-5 than in the mechanical mixture of conventional ZSM-5 and mesoporous silica. The results demonstrate that these hierarchical pores may have good connected networks that facilitate xenon diffusion and exchange. Also, this may give some indications for other molecules adsorption and diffusion in mesoporous zeolites especially in the process of catalysis.
关键词[WOS]: NANOSIZED HZSM-5 ZEOLITE ;  SOLID-STATE NMR ;  SINGLE-CRYSTALS ;  MICROPOROUS STRUCTURE ;  POLARIZED XENON ;  SPECTROSCOPY ;  DIFFUSION ;  CATALYSTS ;  ALUMINOSILICATE ;  DECOMPOSITION
语种: 英语
WOS记录号: WOS:000259552200046
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141026
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

Files in This Item:

There are no files associated with this item.


作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.SINOPEC Shanghai Res Inst Petrochem Technol, Shanghai 201208, Peoples R China

Recommended Citation:
Liu, Yong,Zhang, Weiping,Liu, Zhicheng,et al. Direct observation of the mesopores in ZSM-5 zeolites with hierarchical porous structures by laser-hyperpolarized Xe-129 NMR[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2008,112(39):15375-15381.
Service
 Recommend this item
 Sava as my favorate item
 Show this item's statistics
 Export Endnote File
Google Scholar
 Similar articles in Google Scholar
 [Liu, Yong]'s Articles
 [Zhang, Weiping]'s Articles
 [Liu, Zhicheng]'s Articles
CSDL cross search
 Similar articles in CSDL Cross Search
 [Liu, Yong]‘s Articles
 [Zhang, Weiping]‘s Articles
 [Liu, Zhicheng]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
  Add to CiteULike  Add to Connotea  Add to Del.icio.us  Add to Digg  Add to Reddit 
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Powered by CSpace