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Hyperpolarized <sup>129</sup> NMR Study of TiO<sub>2</sub> Nanotubes
Lee, Sang-Man,Lee, Soon-Chang,Mehrotra, Vandana,Kim, Hae-Jin,Lee, Hee-Cheon Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.2
A continuous flow hyperpolarized (HP) $^{129}Xe$ NMR spectroscopy was employed for the first time to investigate $TiO_2$ 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 $^{129}Xe$ NMR spectra. It was also noted that there is alteration in value for heat of adsorption, ${\Delta}H$ from $12.6{\pm}1.3$ to $16.4{\pm}0.4kJ/mol$ and variation in chemical shift of the xenon adsorbed in channels, ${\delta}_s$ from $120{\pm}2\sim135{\pm}9ppm$ 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.
Hyperpolarized 129Xe NMR Study of TiO2 Nanotubes
Sang Man Lee,Soon Chang Lee,Vandana Mehrotra,김해진,Hee Cheon Lee 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.2
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.