Distribution of Gallium Nanocrystals in Ga/MCM-41 Mesocomposites by Continuous-Flow Hyperpolarized 129Xe NMR Spectroscopy

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DOIResolve DOI: http://doi.org/10.1021/ac050076jS0003-2700(05)00076-4
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TypeArticle
Journal titleAnalytical Chemistry
ISSN00032700
Volume77
Issue10
Pages33793382; # of pages: 4
AbstractThe distribution of gallium nanocrystals in mesoporous MCM-41 host were analyzed by continuous-flow hyperpolarized 129Xe NMR spectroscopy. In contrast to unclear TEM images for the high metal contents, laser-polarized 129Xe probe can detect the whole distribution of gallium in the MCM-41 host. It is found that gallium nanocrystals are included in the mesochannels of MCM-41; a part of them also remains in the interparticle voids. The distribution of gallium metal in MCM-41 is heterogeneous. Not all the mesochannels host metallic gallium even at a high gallium loading of 65.1 wt %. Variable temperature measurements can provide information on the xenon adsorption parameters. This approach opens a sensitive way to probe the distribution of high content species in porous host materials.
Publication date
AffiliationNational Research Council Canada; NRC Institute for Biological Sciences; NRC Steacie Institute for Molecular Sciences
Peer reviewedNo
Identifier10308271
NPARC number12338345
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Record identifier5d02d2b4-57d1-4b6a-a202-cb82b2d522fe
Record created2009-09-10
Record modified2016-05-09
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