DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Joon-Goo | ko |
dc.contributor.author | Park, Ji-Chan | ko |
dc.contributor.author | Bang, Jung-Up | ko |
dc.contributor.author | Song, Hyun-Joon | ko |
dc.date.accessioned | 2009-12-09T06:19:51Z | - |
dc.date.available | 2009-12-09T06:19:51Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2008-09 | - |
dc.identifier.citation | CHEMISTRY OF MATERIALS, v.20, no.18, pp.5839 - 5844 | - |
dc.identifier.issn | 0897-4756 | - |
dc.identifier.uri | http://hdl.handle.net/10203/14454 | - |
dc.description.abstract | Nanoreactor frameworks have many advantages over bulk catalyst structures in terms of providing a regular reaction environment and conformational stability. In this work, Au@SiO2 nanoreactor frameworks were chemically modified to improve the catalytic efficiency of o-nitroaniline reduction. The porosity of silica shells was readily controlled by introducing C18TMS as a porogen with heat treatment. The diffusion rate of the silica layers was tuned from 5.9 x 10(-19) to 2.1 x 10(-18) m(2) s(-1), which directly altered the turnover frequency and rate constant of the reaction. Carboxylate functionality was introduced on the gold cores of Au@SiO2 nanoreactors by 3-MPA addition. The reaction rate was enhanced by a maximum of 2.4 times compared to unfunctionalized catalysts through a strong interaction between carboxylate anions and o-nitroaniline. Totally, the rate constant of Au@SiO2 yolk-shell nanoreactors exhibits a 13-fold enhancement by diffusion and surface functionality control. These results indicate that the rational design of a nanoreactor framework with appropriate chemical functionalization can maximize the catalytic efficiency of various solution-phase reactions. | - |
dc.description.sponsorship | Korea Science and Engineering Foundation (KOSEF) Korean government (MEST) | en |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | SELF-ASSEMBLED MONOLAYERS | - |
dc.subject | GOLD NANOPARTICLES | - |
dc.subject | SILICA | - |
dc.subject | NANOCRYSTALS | - |
dc.subject | REDUCTION | - |
dc.title | Precise tuning of porosity and surface functionality in Au@SiO2 nanoreactors for high catalytic efficiency | - |
dc.type | Article | - |
dc.identifier.wosid | 000259275000016 | - |
dc.identifier.scopusid | 2-s2.0-53549104148 | - |
dc.type.rims | ART | - |
dc.citation.volume | 20 | - |
dc.citation.issue | 18 | - |
dc.citation.beginningpage | 5839 | - |
dc.citation.endingpage | 5844 | - |
dc.citation.publicationname | CHEMISTRY OF MATERIALS | - |
dc.identifier.doi | 10.1021/cm801149w | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Song, Hyun-Joon | - |
dc.contributor.nonIdAuthor | Lee, Joon-Goo | - |
dc.contributor.nonIdAuthor | Park, Ji-Chan | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | SELF-ASSEMBLED MONOLAYERS | - |
dc.subject.keywordPlus | GOLD NANOPARTICLES | - |
dc.subject.keywordPlus | SILICA | - |
dc.subject.keywordPlus | NANOCRYSTALS | - |
dc.subject.keywordPlus | REDUCTION | - |
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