Planting of bis(1,5‐cyclooctadiene) nickel upon silica to harvest NiO (<5 nm) nanoparticles in a silica matrix
Identifieur interne : 000419 ( Main/Exploration ); précédent : 000418; suivant : 000420Planting of bis(1,5‐cyclooctadiene) nickel upon silica to harvest NiO (<5 nm) nanoparticles in a silica matrix
Auteurs : Kake Zhu [Allemagne] ; Lawrence D'Souza [Allemagne] ; Ryan M. Richards [Allemagne]Source :
- Applied Organometallic Chemistry [ 0268-2605 ] ; 2005-09.
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Abstract
Bis(1,5‐cyclooctadiene) nickel [Ni(COD)2] was employed as a nickel precursor to prepare nickel oxide nanoparticles upon high‐surface‐area mesoporous silica. Under protection of argon, Ni(COD)2 was dissolved in tetrahydrofuran (THF) to react with surface silanols of mesoporous silica SBA‐15, which formed a black powder after completion of the surface reaction. Calcination of the powder produced ultrafine NiO inside the mesoporous silica matrix, which was evidenced by X‐ray diffraction, N2 adsorption–desorption, transmission electron microscopy and thermogravimetric analysis. The thermogravimetric analysis suggests that NiO formation is a result of surface nickel species calcination, whereas structural characterization clearly show that NiO nanoparticles of <5 nm are evenly distributed inside the silica SBA‐15 matrix and mesoporosity is well preserved upon calcinations and NiO formation. The surface reaction between Ni(COD)2 and surface silanols was found for the first time, and the method used here may be extended conveniently to prepare other metal oxide nanoparticles upon high‐surface‐area supports as well. Copyright © 2005 John Wiley & Sons, Ltd.
Url:
DOI: 10.1002/aoc.974
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Chem.</title><idno type="ISSN">0268-2605</idno><idno type="eISSN">1099-0739</idno><imprint><publisher>John Wiley & Sons, Ltd.</publisher><pubPlace>Chichester, UK</pubPlace><date type="published" when="2005-09">2005-09</date><biblScope unit="volume">19</biblScope><biblScope unit="issue">9</biblScope><biblScope unit="page" from="1065">1065</biblScope><biblScope unit="page" to="1069">1069</biblScope></imprint><idno type="ISSN">0268-2605</idno></series><idno type="istex">0E4010158B788E21ED1703B8EF7CC7AEEA085E77</idno><idno type="DOI">10.1002/aoc.974</idno><idno type="ArticleID">AOC974</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0268-2605</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>NiO</term><term>bis(1,5‐cyclooctadiene) nickel</term><term>grafting</term><term>mesoporous silica</term><term>nanoparticle</term><term>surface modification</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Bis(1,5‐cyclooctadiene) nickel [Ni(COD)2] was employed as a nickel precursor to prepare nickel oxide nanoparticles upon high‐surface‐area mesoporous silica. Under protection of argon, Ni(COD)2 was dissolved in tetrahydrofuran (THF) to react with surface silanols of mesoporous silica SBA‐15, which formed a black powder after completion of the surface reaction. Calcination of the powder produced ultrafine NiO inside the mesoporous silica matrix, which was evidenced by X‐ray diffraction, N2 adsorption–desorption, transmission electron microscopy and thermogravimetric analysis. The thermogravimetric analysis suggests that NiO formation is a result of surface nickel species calcination, whereas structural characterization clearly show that NiO nanoparticles of <5 nm are evenly distributed inside the silica SBA‐15 matrix and mesoporosity is well preserved upon calcinations and NiO formation. The surface reaction between Ni(COD)2 and surface silanols was found for the first time, and the method used here may be extended conveniently to prepare other metal oxide nanoparticles upon high‐surface‐area supports as well. Copyright © 2005 John Wiley & Sons, Ltd.</div></front></TEI><affiliations><list><country><li>Allemagne</li></country><region><li>Brême (Land)</li></region><settlement><li>Brême</li></settlement></list><tree><country name="Allemagne"><region name="Brême (Land)"><name sortKey="Zhu, Kake" sort="Zhu, Kake" uniqKey="Zhu K" first="Kake" last="Zhu">Kake Zhu</name></region><name sortKey="D Souza, Lawrence" sort="D Souza, Lawrence" uniqKey="D Souza L" first="Lawrence" last="D'Souza">Lawrence D'Souza</name><name sortKey="Richards, Ryan M" sort="Richards, Ryan M" uniqKey="Richards R" first="Ryan M." last="Richards">Ryan M. Richards</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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