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Article: Spent Coffee Grounds-Templated Magnetic Nanocatalysts for Mild Oxidations

TitleSpent Coffee Grounds-Templated Magnetic Nanocatalysts for Mild Oxidations
Authors
Keywordsspent coffee grounds
biomass valorization
iron oxide
magnetic materials
heterogeneous catalysis
Issue Date2019
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/ascecg
Citation
ACS Sustainable Chemistry & Engineering, 2019, v. 7 n. 20, p. 17030-17038 How to Cite?
AbstractEnvironmental harmful effects of spent coffee in stream waters pushed our research group to find new applications for this waste material. A new family of magnetic nanocatalysts was synthesized based on spent coffee grounds and ammonium iron(III) citrate as iron precursor via solvent-free mechanochemical milling followed by calcination at different temperatures. X-ray diffraction data together with magnetic susceptibility measurements showed the unique properties of these materials, including the unprecedented presence of a maghemite phase at calcination temperatures as high as 800 °C. The work is completed with the help of a multiethnic characterization approach based on data obtained by N2 physisorption, transmission electronic microscopy (TEM)–high-resolution TEM, X-ray photoelectronic spectroscopy, and thermogravimetric analysis. Considering the advantages related to magnetic features, mostly associated with the simple recovery and reuse, materials were tested in the catalytic oxidation of isoeugenol towards vanillin under both, conventional heating and microwave-assisted conditions. Remarkably, a clear enhancement in the catalytic behavior was observed by using microwave irradiation. The results evidenced that hematite content could be a decisive factor to control the activity and selectivity of the reaction.
Persistent Identifierhttp://hdl.handle.net/10722/291219
ISSN
2020 Impact Factor: 8.198
2015 SCImago Journal Rankings: 1.456
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorRodríguez-Padrón, D-
dc.contributor.authorMuñoz-Batista, MJ-
dc.contributor.authorLI, H-
dc.contributor.authorShih, K-
dc.contributor.authorBalu, AM-
dc.contributor.authorPineda, A-
dc.contributor.authorLuque, R-
dc.date.accessioned2020-11-07T13:53:59Z-
dc.date.available2020-11-07T13:53:59Z-
dc.date.issued2019-
dc.identifier.citationACS Sustainable Chemistry & Engineering, 2019, v. 7 n. 20, p. 17030-17038-
dc.identifier.issn2168-0485-
dc.identifier.urihttp://hdl.handle.net/10722/291219-
dc.description.abstractEnvironmental harmful effects of spent coffee in stream waters pushed our research group to find new applications for this waste material. A new family of magnetic nanocatalysts was synthesized based on spent coffee grounds and ammonium iron(III) citrate as iron precursor via solvent-free mechanochemical milling followed by calcination at different temperatures. X-ray diffraction data together with magnetic susceptibility measurements showed the unique properties of these materials, including the unprecedented presence of a maghemite phase at calcination temperatures as high as 800 °C. The work is completed with the help of a multiethnic characterization approach based on data obtained by N2 physisorption, transmission electronic microscopy (TEM)–high-resolution TEM, X-ray photoelectronic spectroscopy, and thermogravimetric analysis. Considering the advantages related to magnetic features, mostly associated with the simple recovery and reuse, materials were tested in the catalytic oxidation of isoeugenol towards vanillin under both, conventional heating and microwave-assisted conditions. Remarkably, a clear enhancement in the catalytic behavior was observed by using microwave irradiation. The results evidenced that hematite content could be a decisive factor to control the activity and selectivity of the reaction.-
dc.languageeng-
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/ascecg-
dc.relation.ispartofACS Sustainable Chemistry & Engineering-
dc.rightsThis document is the Accepted Manuscript version of a Published Work that appeared in final form in [JournalTitle], copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see [insert ACS Articles on Request author-directed link to Published Work, see http://pubs.acs.org/page/policy/articlesonrequest/index.html].-
dc.subjectspent coffee grounds-
dc.subjectbiomass valorization-
dc.subjectiron oxide-
dc.subjectmagnetic materials-
dc.subjectheterogeneous catalysis-
dc.titleSpent Coffee Grounds-Templated Magnetic Nanocatalysts for Mild Oxidations-
dc.typeArticle-
dc.identifier.emailShih, K: kshih@hku.hk-
dc.identifier.authorityShih, K=rp00167-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/acssuschemeng.9b02919-
dc.identifier.scopuseid_2-s2.0-85073142729-
dc.identifier.hkuros318641-
dc.identifier.volume7-
dc.identifier.issue20-
dc.identifier.spage17030-
dc.identifier.epage17038-
dc.identifier.isiWOS:000492117200013-
dc.publisher.placeUnited States-
dc.identifier.issnl2168-0485-

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