Bimodal mesoporous hard carbons from stabilized resorcinol-formaldehyde resin and silica template with enhanced adsorption capacity

Hard carbon powders with hierarchical mesoporous structure from resorcinol-formaldehyde polymer were successfully prepared by use of double pore forming method. Poly-diallyldimethylammonium chloride (pDADMAC) and commercial silica (Sipernat® 50) were used as structuring agent and hard template, resp...

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Publicado:	2019
Materias:	Adsorption capacity Bimodal pore size distribution Hard carbon pDADMAC Porous silica Adsorption Architectural acoustics Carbon Chlorine compounds Crystallite size Formaldehyde Mesoporous materials Microporosity Microstructure Phenols Silica Size distribution X ray powder diffraction Adsorption capacities PDADMAC Pore size
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13858947_v_n_p631_FuentesQuezada http://hdl.handle.net/20.500.12110/paper_13858947_v_n_p631_FuentesQuezada
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_13858947_v_n_p631_FuentesQuezada
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spelling	paper:paper_13858947_v_n_p631_FuentesQuezada2023-06-08T16:12:47Z Bimodal mesoporous hard carbons from stabilized resorcinol-formaldehyde resin and silica template with enhanced adsorption capacity Adsorption capacity Bimodal pore size distribution Hard carbon pDADMAC Porous silica Adsorption Architectural acoustics Carbon Chlorine compounds Crystallite size Formaldehyde Mesoporous materials Microporosity Microstructure Phenols Silica Size distribution X ray powder diffraction Adsorption capacities Bimodal pore size distribution Hard carbon PDADMAC Porous silica Pore size Hard carbon powders with hierarchical mesoporous structure from resorcinol-formaldehyde polymer were successfully prepared by use of double pore forming method. Poly-diallyldimethylammonium chloride (pDADMAC) and commercial silica (Sipernat® 50) were used as structuring agent and hard template, respectively. Through the proposed procedure carbon powder with bimodal mesoporous size distribution (around 4–5 nm and 20–40 nm) and different pore volume ratios can be obtained, by changing the ratio pDADMAC/silica used in the synthesis. Pore volumes between 0.70 and 2.10 cm3·g−1, and specific surface areas between 662 and 998 m2·g−1 were obtained. Raman spectroscopy and X-Ray diffraction analysis showed that all the carbons presented a non-ordered mesopore structure, and a hard carbon micro-structure with roughly 40% of single-layer microstructures, an average of 2.6 stacked graphene layers, and an in-plane graphitic crystallite size around 3.4 nm. We have evaluated the adsorption of methylene blue, as a model of a pollutant dye, on the mesoporous carbons with different pore size distribution, and we found that carbons with bimodal pore size distribution exhibit a remarkable and irreversible adsorption capacity. Microporosity can help to enhance the adsorption capacity, provided that micropores are connected to mesopores, allowing the adsorbate to get deep into the carbon structure. The adsorption kinetic is very fast for carbons with such pore architecture, and can be well described by a three-stage intraparticle diffusion model. © 2018 Elsevier B.V. 2019 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13858947_v_n_p631_FuentesQuezada http://hdl.handle.net/20.500.12110/paper_13858947_v_n_p631_FuentesQuezada
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Adsorption capacity Bimodal pore size distribution Hard carbon pDADMAC Porous silica Adsorption Architectural acoustics Carbon Chlorine compounds Crystallite size Formaldehyde Mesoporous materials Microporosity Microstructure Phenols Silica Size distribution X ray powder diffraction Adsorption capacities Bimodal pore size distribution Hard carbon PDADMAC Porous silica Pore size
spellingShingle	Adsorption capacity Bimodal pore size distribution Hard carbon pDADMAC Porous silica Adsorption Architectural acoustics Carbon Chlorine compounds Crystallite size Formaldehyde Mesoporous materials Microporosity Microstructure Phenols Silica Size distribution X ray powder diffraction Adsorption capacities Bimodal pore size distribution Hard carbon PDADMAC Porous silica Pore size Bimodal mesoporous hard carbons from stabilized resorcinol-formaldehyde resin and silica template with enhanced adsorption capacity
topic_facet	Adsorption capacity Bimodal pore size distribution Hard carbon pDADMAC Porous silica Adsorption Architectural acoustics Carbon Chlorine compounds Crystallite size Formaldehyde Mesoporous materials Microporosity Microstructure Phenols Silica Size distribution X ray powder diffraction Adsorption capacities Bimodal pore size distribution Hard carbon PDADMAC Porous silica Pore size
description	Hard carbon powders with hierarchical mesoporous structure from resorcinol-formaldehyde polymer were successfully prepared by use of double pore forming method. Poly-diallyldimethylammonium chloride (pDADMAC) and commercial silica (Sipernat® 50) were used as structuring agent and hard template, respectively. Through the proposed procedure carbon powder with bimodal mesoporous size distribution (around 4–5 nm and 20–40 nm) and different pore volume ratios can be obtained, by changing the ratio pDADMAC/silica used in the synthesis. Pore volumes between 0.70 and 2.10 cm3·g−1, and specific surface areas between 662 and 998 m2·g−1 were obtained. Raman spectroscopy and X-Ray diffraction analysis showed that all the carbons presented a non-ordered mesopore structure, and a hard carbon micro-structure with roughly 40% of single-layer microstructures, an average of 2.6 stacked graphene layers, and an in-plane graphitic crystallite size around 3.4 nm. We have evaluated the adsorption of methylene blue, as a model of a pollutant dye, on the mesoporous carbons with different pore size distribution, and we found that carbons with bimodal pore size distribution exhibit a remarkable and irreversible adsorption capacity. Microporosity can help to enhance the adsorption capacity, provided that micropores are connected to mesopores, allowing the adsorbate to get deep into the carbon structure. The adsorption kinetic is very fast for carbons with such pore architecture, and can be well described by a three-stage intraparticle diffusion model. © 2018 Elsevier B.V.
title	Bimodal mesoporous hard carbons from stabilized resorcinol-formaldehyde resin and silica template with enhanced adsorption capacity
title_short	Bimodal mesoporous hard carbons from stabilized resorcinol-formaldehyde resin and silica template with enhanced adsorption capacity
title_full	Bimodal mesoporous hard carbons from stabilized resorcinol-formaldehyde resin and silica template with enhanced adsorption capacity
title_fullStr	Bimodal mesoporous hard carbons from stabilized resorcinol-formaldehyde resin and silica template with enhanced adsorption capacity
title_full_unstemmed	Bimodal mesoporous hard carbons from stabilized resorcinol-formaldehyde resin and silica template with enhanced adsorption capacity
title_sort	bimodal mesoporous hard carbons from stabilized resorcinol-formaldehyde resin and silica template with enhanced adsorption capacity
publishDate	2019
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13858947_v_n_p631_FuentesQuezada http://hdl.handle.net/20.500.12110/paper_13858947_v_n_p631_FuentesQuezada
_version_	1768546082360393728

Bimodal mesoporous hard carbons from stabilized resorcinol-formaldehyde resin and silica template with enhanced adsorption capacity

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