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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 2
BKCSDE 33(2)
February 20, 2012 

 
Title
Hyperpolarized 129Xe NMR Study of TiO2 Nanotubes
Author
Sang Man Lee, Soon Chang Lee, Vandana Mehrotra, Hae Jin Kim, Hee Cheon Lee*,
Keywords
NMR, Hyperpolarization, Xenon, TiO2, Nanotubes
Abstract
A continuous flow hyperpolarized (HP) 129Xe NMR spectroscopy was employed for the first time to investigate TiO2 nanotubes (Ti-NTs) synthesized from commercial nanoparticles with different reaction times. A single peak attributing to channels for Ti-NTs was observed for variable temperature HP 129Xe NMR spectra. It was also noted that there is alteration in value for heat of adsorption, ΔH from 12.6 ± 1.3 to 16.4 ± 0.4 kJ/mol and variation in chemical shift of the xenon adsorbed in channels, δs from 120 ± 2 ~ 135 ± 9 ppm which were closely correlated to channel length and it was shown that P25-24 Ti-NTs with longest channel is most favorite Ti-NTs for Xe adsorption.
Page
511 - 514
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