BROWSE

Related Researcher

Author's Photo

Kwak, Ja Hun
Molecular Catalysis lab
Research Interests
  • Heterogeneous catalysis, molecular catalysis, ASlumima, zeolites

ITEM VIEW & DOWNLOAD

XE-129 NUCLEAR-MAGNETIC-RESONANCE STUDY ON A SOLID-STATE DEFECT IN HZSM-5 ZEOLITE

Cited 13 times inthomson ciCited 13 times inthomson ci
Title
XE-129 NUCLEAR-MAGNETIC-RESONANCE STUDY ON A SOLID-STATE DEFECT IN HZSM-5 ZEOLITE
Other Titles
XE-129 NUCLEAR-MAGNETIC-RESONANCE STUDY ON A SOLID-STATE DEFECT IN HZSM-5 ZEOLITE
Author
RYOO, RyongIHEE, HyotcherlKwak, JahunSEO, GonLIU, Shang-Bin
Keywords
XE-129 NUCLEAR MAGNETIC RESONANCE; ZSM-5 ZEOLITE; SOLID-STATE DEFECT; ELECTRON SPIN RESONANCE OF ZEOLITE
Issue Date
1995-04
Publisher
Elsevier BV
Citation
MICROPOROUS MATERIALS, v.4, no.1, pp.59 - 64
Abstract
HZSM-5 and NaZSM-5 zeolites of various Si/Al ratios ranging from 20 to 130 have been characterized by Xe-129 nuclear magnetic resonance (NMR) spectroscopy at 296 K, following evacuation at temperatures between 673 and 823 K. Increases in the aluminum content and evacuation temperature resulted in significant increases in the Xe-129 NMR line width and chemical shift of xenon adsorbed on HZSM-5. Similarly, the electron spin resonance (ESR) signal at g = 2.000 +/- 0.005 increased in intensity with increasing Al content or evacuation temperature. In the case of NaZSM-5, evacuation at high temperature did not affect the Xe-129 NMR spectrum, and the ESR signal disappeared. These results are attributed to paramagnetic solid-state defects in HZSM-5 arising from the hydroxyl groups that bridge the Al and Si atoms in the zeolite framework
URI
Go to Link
DOI
10.1016/0927-6513(94)00083-8
ISSN
0927-6513
Appears in Collections:
ECHE_Journal Papers
Files in This Item:
0927651394000838.htm Download

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

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

MENU