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dc.contributor.author
Barrera Diaz, Deicy Amparo  
dc.contributor.author
Mendonça, Fernanda Gomes de  
dc.contributor.author
de Castro, Arthur Henrique  
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de Mesquita, João Paulo  
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Lago, Rochel Montero  
dc.contributor.author
Sapag, Manuel Karim  
dc.date.available
2019-10-18T21:39:56Z  
dc.date.issued
2018-06  
dc.identifier.citation
Barrera Diaz, Deicy Amparo; Mendonça, Fernanda Gomes de; de Castro, Arthur Henrique; de Mesquita, João Paulo; Lago, Rochel Montero; et al.; Surface modified mesoporous nanocast carbon as a catalyst for aqueous sulfide oxidation and adsorption of the produced polysulfides; Royal Society of Chemistry; New Journal of Chemistry; 42; 14; 6-2018; 11708-11714  
dc.identifier.issn
1144-0546  
dc.identifier.uri
http://hdl.handle.net/11336/86515  
dc.description.abstract
In this work, a mesoporous nanocast carbon prepared using SBA-15 as a template was modified by surface oxidation to produce unique catalysts for sulfide oxidation/elimination from an aqueous medium. Different characterization techniques (BET, SEM, Raman, FTIR, potentiometric titration, elemental analyses, cyclic voltammetry) showed that treatment with concentrated HNO3 at 80 °C for 5, 15 and 30 min attacks the carbon structure creating different oxygen surface functionalities in concentrations varying from 0.4-1.1 mmol g-1 with a small effect on the surface area (1080-1148 m2 g-1) and pore volumes (micropore 0.17-0.20 cm3 g-1 and mesopores 0.36-0.50 cm3 g-1). These materials showed high activities for the oxidation of sulfide in an aqueous medium forming polysulfides, e.g., S2 2-, S3 2- and S4 2-, which are rapidly eliminated from the aqueous medium. These results are discussed regarding efficient sulfide oxidation at redox surface oxygen sites leading to the formation of higher polysulfides followed by adsorption of these relatively large and more hydrophobic molecules into the mesopores.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Royal Society of Chemistry  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/  
dc.subject
MODIFIED MESOPOROUS NANOCAST  
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SULFIDE OXIDATION AND ADSORPTION  
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CHARACTERIZATION  
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Nano-materiales  
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Nanotecnología  
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INGENIERÍAS Y TECNOLOGÍAS  
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Otras Ciencias Químicas  
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Ciencias Químicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
Surface modified mesoporous nanocast carbon as a catalyst for aqueous sulfide oxidation and adsorption of the produced polysulfides  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-10-15T14:12:50Z  
dc.journal.volume
42  
dc.journal.number
14  
dc.journal.pagination
11708-11714  
dc.journal.pais
Reino Unido  
dc.journal.ciudad
Cambridge  
dc.description.fil
Fil: Barrera Diaz, Deicy Amparo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; Argentina  
dc.description.fil
Fil: Mendonça, Fernanda Gomes de. Universidade Federal de Minas Gerais; Brasil  
dc.description.fil
Fil: de Castro, Arthur Henrique. Universidade Federal dos Vales do Jequitinhonha e Mucuri; Brasil  
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Fil: de Mesquita, João Paulo. Universidade Federal dos Vales do Jequitinhonha e Mucuri; Brasil  
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Fil: Lago, Rochel Montero. Universidade Federal de Minas Gerais; Brasil  
dc.description.fil
Fil: Sapag, Manuel Karim. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; Argentina  
dc.journal.title
New Journal of Chemistry  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1039/C8NJ00922H  
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info:eu-repo/semantics/altIdentifier/url/https://pubs.rsc.org/en/content/articlelanding/2018/NJ/C8NJ00922H#!divAbstract