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- Publisher Website: 10.1021/acssuschemeng.9b02919
- Scopus: eid_2-s2.0-85073142729
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Article: Spent Coffee Grounds-Templated Magnetic Nanocatalysts for Mild Oxidations
Title | Spent Coffee Grounds-Templated Magnetic Nanocatalysts for Mild Oxidations |
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Authors | |
Keywords | spent coffee grounds biomass valorization iron oxide magnetic materials heterogeneous catalysis |
Issue Date | 2019 |
Publisher | American 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? |
Abstract | Environmental 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 Identifier | http://hdl.handle.net/10722/291219 |
ISSN | 2023 Impact Factor: 7.1 2023 SCImago Journal Rankings: 1.664 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Rodríguez-Padrón, D | - |
dc.contributor.author | Muñoz-Batista, MJ | - |
dc.contributor.author | LI, H | - |
dc.contributor.author | Shih, K | - |
dc.contributor.author | Balu, AM | - |
dc.contributor.author | Pineda, A | - |
dc.contributor.author | Luque, R | - |
dc.date.accessioned | 2020-11-07T13:53:59Z | - |
dc.date.available | 2020-11-07T13:53:59Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | ACS Sustainable Chemistry & Engineering, 2019, v. 7 n. 20, p. 17030-17038 | - |
dc.identifier.issn | 2168-0485 | - |
dc.identifier.uri | http://hdl.handle.net/10722/291219 | - |
dc.description.abstract | Environmental 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.language | eng | - |
dc.publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/journal/ascecg | - |
dc.relation.ispartof | ACS Sustainable Chemistry & Engineering | - |
dc.rights | This 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.subject | spent coffee grounds | - |
dc.subject | biomass valorization | - |
dc.subject | iron oxide | - |
dc.subject | magnetic materials | - |
dc.subject | heterogeneous catalysis | - |
dc.title | Spent Coffee Grounds-Templated Magnetic Nanocatalysts for Mild Oxidations | - |
dc.type | Article | - |
dc.identifier.email | Shih, K: kshih@hku.hk | - |
dc.identifier.authority | Shih, K=rp00167 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1021/acssuschemeng.9b02919 | - |
dc.identifier.scopus | eid_2-s2.0-85073142729 | - |
dc.identifier.hkuros | 318641 | - |
dc.identifier.volume | 7 | - |
dc.identifier.issue | 20 | - |
dc.identifier.spage | 17030 | - |
dc.identifier.epage | 17038 | - |
dc.identifier.isi | WOS:000492117200013 | - |
dc.publisher.place | United States | - |
dc.identifier.issnl | 2168-0485 | - |