Micromesoporous Activated Carbons as Catalysts for the Efficient Oxidation of Aqueous Sulfide
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Título: | Micromesoporous Activated Carbons as Catalysts for the Efficient Oxidation of Aqueous Sulfide |
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Autor/es: | Castro, Mateus Carvalho Monteiro de | Cunha, Igor Tadeu | Mendonça, Fernanda Gomes de | Augusti, Rodinei | Mesquita, Joao Paulo de | Araujo, Maria Helena | Martinez-Escandell, Manuel | Molina Sabio, Miguel | Lago, Rochel Montero | Rodríguez Reinoso, Francisco |
Grupo/s de investigación o GITE: | Materiales Avanzados |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | Micromesoporous | Activated carbons | Catalysts | Efficient oxidation | Aqueous sulfide |
Área/s de conocimiento: | Química Inorgánica |
Fecha de publicación: | 28-sep-2017 |
Editor: | American Chemical Society |
Cita bibliográfica: | Langmuir. 2017, 33(43): 11857-11861. doi:10.1021/acs.langmuir.7b01499 |
Resumen: | KOH activation of a mesophase pitch produces very efficient carbons for the removal of sulfide in aqueous solution, increasing the sulfur oxidation rate with the degree of activation of the carbon. These carbons are characterized by their graphitic structures, with domains of sizes of around 20 nm, and a moderate concentration of surface oxygen groups (0.2–0.5 mmol·g–1) dominating the basic groups. Because the activation leads first to a strong development of the micropores and later to a development of the mesopores, the surface area values are always high, reaching values of as high as 3250 m2·g–1 in the most activated carbon, with a volume of mesopores of as high as 44% of the total pore volume. In the presence of this carbon, the sulfide oxidation rate is 100 times higher than that found for a commercial activated carbon, the results indicating that the porosity of the carbon, especially mesoporosity, plays a role more important than the structure or the chemical nature of the carbon in the kinetics of sulfide oxidation to different polysulfides. |
Patrocinador/es: | The authors thank CNPq, CAPES, INCT, PRPq-UFMG, and Prometeo II/2014/004 for financial support. |
URI: | http://hdl.handle.net/10045/72434 |
ISSN: | 0743-7463 (Print) | 1520-5827 (Online) |
DOI: | 10.1021/acs.langmuir.7b01499 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2017 American Chemical Society |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1021/acs.langmuir.7b01499 |
Aparece en las colecciones: | INV - LMA - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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2017_Castro_etal_Langmuir_final.pdf | Versión final (acceso restringido) | 3,47 MB | Adobe PDF | Abrir Solicitar una copia |
2017_Castro_etal_Langmuir_accepted.pdf | Accepted Manuscript (acceso abierto) | 2,8 MB | Adobe PDF | Abrir Vista previa |
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