Publication
Exploring the activity of chemical-activated carbons synthesized from peach stones as metal-free catalysts for wet peroxide oxidation
| dc.contributor.author | Martin-Martinez, Maria | |
| dc.contributor.author | Álvarez-Torrellas, Silvia | |
| dc.contributor.author | García, Juan | |
| dc.contributor.author | Silva, Adrián | |
| dc.contributor.author | Faria, Joaquim | |
| dc.contributor.author | Gomes, Helder | |
| dc.date.accessioned | 2018-02-19T10:00:00Z | |
| dc.date.accessioned | 2018-07-31T15:22:46Z | |
| dc.date.available | 2018-01-19T10:00:00Z | |
| dc.date.available | 2018-07-31T15:22:46Z | |
| dc.date.issued | 2018 | |
| dc.description.abstract | Peach stones were used as raw material for the synthesis of activated carbons with different properties. Firstly, peach stones were chemically activated using a 12M H3PO4 solution and carbonized under flowing air (400 °C). The obtained activated carbon, named as PS, is characterized by a high surface development (SBET=1262m2 g−1) and acidic character (pHPZC=4.2). A fraction of PS was further carbonized under N2 atmosphere at 800 °C to remove surface functionalities and to increase its basicity (PS-800). In addition, a Pt catalyst supported on PS (3% w/w Pt/PS) was synthesized by incipient wetness impregnation, resulting in a considerable hydrophilicity increasing. The synthesized materials were tested in the catalytic wet peroxide oxidation (CWPO) of highly concentrated solutions of 4-nitrophenol (4-NP, 5 g L−1) during 24 h experiments, conducted at relatively mild operating conditions (T=50–110 °C, pH=3, catalyst load=2.5 g L−1 and [H2O2]0=17.8 g L−1, corresponding to the stoichiometric amount of H2O2 needed for the complete mineralization of 4-NP). It was observed that the increase of electron-donating functionalities in PS-800 promotes the generation of reactive HO% radicals, being the activity towards CWPO twice higher than that obtained with the pristine PS. Besides, increasing operating temperature substantially enhances CWPO, finding a 80% of 4-NP removal at 110 °C. On the other hand, despite the sharp increment in H2O2 decomposition due to the presence of Pt particles in Pt/PS catalyst, this decomposition is inefficient in all cases, with a consequent poor pollutant removal. This can be attributed to the recombination of HO% radicals into non-reactive species −scavenging effects, promoted by the hydrophilicity of the catalyst. | |
| dc.description.sponsorship | This work is a result of project “AIProcMat@N2020 − Advanced Industrial Processes and Materials for a Sustainable Northern Region of Portugal 2020”, with the reference NORTE-01-0145-FEDER-000006, supported by NORTE 2020, under the Portugal 2020 Partnership Agreement, through the ERDF and of Project POCI-01-0145-FEDER- 006984–Associate Laboratory LSRE-LCM funded by ERDF through COMPETE2020 − POCI − and by national funds through FCT. M. Martín Martínez and A.M.T. Silva acknowledge the FCT Postdoc grant SFRH/BPD/108510/2015 and FCT Investigator 2013 Programme IF/ 01501/2013, respectively. | |
| dc.description.version | info:eu-repo/semantics/publishedVersion | en_EN |
| dc.identifier.citation | Martin-Martinez, Maria; Álvarez-Torrellas, Silvia; García, Juan; Silva, Adrián M.T.; Faria, Joaquim L.; Gomes, Helder T. (2018). Exploring the activity of chemical-activated carbons synthesized from peach stones as metal-free catalysts for wet peroxide oxidation. Catalysis Today. ISSN 0920-5861. 313, p. 20-25 | en_EN |
| dc.identifier.doi | 10.1016/j.cattod.2018.01.003 | en_EN |
| dc.identifier.issn | 0920-5861 | |
| dc.identifier.uri | http://hdl.handle.net/10198/14483 | |
| dc.language.iso | eng | |
| dc.peerreviewed | yes | en_EN |
| dc.relation | Treatment of oily wastewater by oxidation with amphiphilic carbon-based catalysts | |
| dc.subject | Activated carbon | en_EN |
| dc.subject | Chemical activation | en_EN |
| dc.subject | Metal-free CWPO | en_EN |
| dc.subject | Peach stone | en_EN |
| dc.title | Exploring the activity of chemical-activated carbons synthesized from peach stones as metal-free catalysts for wet peroxide oxidation | en_EN |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.awardTitle | Treatment of oily wastewater by oxidation with amphiphilic carbon-based catalysts | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/FARH/SFRH%2FBPD%2F108510%2F2015/PT | |
| oaire.fundingStream | FARH | |
| person.familyName | Gomes | |
| person.givenName | Helder | |
| person.identifier.ciencia-id | 6218-1E19-13EE | |
| person.identifier.orcid | 0000-0001-6898-2408 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| rcaap.rights | openAccess | en_EN |
| rcaap.type | article | en_EN |
| relation.isAuthorOfPublication | 0eb96337-224a-4339-9918-334436fbbb99 | |
| relation.isAuthorOfPublication.latestForDiscovery | 0eb96337-224a-4339-9918-334436fbbb99 | |
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