Publication
The role of activated carbons functionalized with thiol and sulfonic acid groups in catalytic wet peroxide oxidation
| dc.contributor.author | Gomes, Helder | |
| dc.contributor.author | Miranda, Sandra | |
| dc.contributor.author | Sampaio, Maria | |
| dc.contributor.author | Figueiredo, José | |
| dc.contributor.author | Silva, Adrián | |
| dc.contributor.author | Faria, Joaquim | |
| dc.date.accessioned | 2011-11-22T15:03:57Z | |
| dc.date.available | 2011-11-22T15:03:57Z | |
| dc.date.issued | 2011 | |
| dc.description.abstract | Norit ROX 0.8 commercial activated carbon was subjected to liquid phase treatments with sulfuric acid at different concentrations (5-18 M) and temperatures (353 and 423 K), to generate different amounts (760-1000 mu mol g(-1)) of sulfur groups (thiol and sulfonic acid), with varying surface acidity. The prepared materials were chemically characterized by the determination of the point of zero charge (2.0-5.8) and by mass titration, temperature programmed desorption and X-ray photoelectron spectroscopy, to evaluate the nature and concentration of acidic surface functionalities. The materials were tested as catalysts in the catalytic wet peroxide oxidation of aqueous solutions of the acid dye Chromotrope 2R. A correlation between the surface acidic strength and the efficiency for dye removal from solution was found, which was ascribed both to adsorption and to reaction. In general, dye removal by adsorption is increased when using adsorbents with lower acidic character, due to enhanced electrostatic attraction between the acid dye and the catalyst surface. In addition, the introduction of sulfur containing groups promotes the decomposition of hydrogen peroxide, leading to increased production of hydroxyl radicals close to the pollutant and subsequent improved dye degradation. | por |
| dc.description.sponsorship | FCT for the LSRE/LCM LA financing from “Programa de Financiamento Plurianual de Unidades de I&D/Laboratórios Associados”, REEQ/1106/EQU2005 and project PTDC/AAC-AMB/110088/2009, financed by FCT and FEDER in the context of Programme COMPETE. Norit for supplying ROX 0.8. AMTS acknowledges the financial support from POCI/N010/2006. The authors also acknowledge Dr. Carlos M. Sá (CEMUP) for assistance with XPS. | |
| dc.identifier.citation | Gomes, Helder; Miranda, Sandra, Sampaio, Maria; Figueiredo, José; Silva, Adrián; Faria, Joaquim (2011). The role of activated carbons functionalized with thiol and sulfonic acid groups in catalytic wet peroxide oxidation, Applied Catalysis B-Environmental. ISSN 0926-3373. 106:3-4, p. 390-397 | por |
| dc.identifier.doi | 10.1016/j.apcatb.2011.05.044 | |
| dc.identifier.eissn | 1873-3883 | |
| dc.identifier.issn | 0926-3373 | |
| dc.identifier.uri | http://hdl.handle.net/10198/6343 | |
| dc.language.iso | eng | por |
| dc.peerreviewed | yes | por |
| dc.publisher | Elsevier | |
| dc.relation | Degradation of organic pollutants by catalytic wet peroxide oxidation using carbon materials | |
| dc.subject | Activated carbon | por |
| dc.subject | Surface chemistry | por |
| dc.subject | Sulfur containing functional groups | por |
| dc.subject | Sulfonic acids | por |
| dc.subject | Thiols | por |
| dc.subject | Catalytic wet peroxide oxidation | por |
| dc.title | The role of activated carbons functionalized with thiol and sulfonic acid groups in catalytic wet peroxide oxidation | por |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.awardTitle | Degradation of organic pollutants by catalytic wet peroxide oxidation using carbon materials | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/5876-PPCDTI/PTDC%2FAAC-AMB%2F110088%2F2009/PT | |
| oaire.citation.endPage | 397 | por |
| oaire.citation.startPage | 390 | por |
| oaire.citation.title | Applied Catalysis B-Environmental | por |
| oaire.fundingStream | 5876-PPCDTI | |
| 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 | restrictedAccess | por |
| rcaap.type | article | por |
| relation.isAuthorOfPublication | 0eb96337-224a-4339-9918-334436fbbb99 | |
| relation.isAuthorOfPublication.latestForDiscovery | 0eb96337-224a-4339-9918-334436fbbb99 | |
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