Porous chitosan-based nanocomposites containing gold nanoparticles. Increasing the catalytic performance through film porosity

The preparation of porous and non-porous chitosan thin-films containing gold nanoparticles was carried out, aiming to evaluate the effect of porosity on their catalytic response using the p-nitrophenol reduction as model reaction. To achieve this, both types of samples were decorated with gold nanop...

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Autores: Díaz Díaz, David, Bonardd, Sebastián, Ramírez, Óscar, Abarca, Gabriel, Leiva, Ángel, Saldías, César
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Universidad de La Laguna (ULL)
Repositorio:RIULL. Repositorio Institucional de la Universidad de La Laguna
OAI Identifier:oai:riull.ull.es:915/42210
Acceso en línea:http://riull.ull.es/xmlui/handle/915/42210
Access Level:acceso abierto
Palabra clave:Porous nanocomposites
Thin-films
Chitosan
Gold nanoparticle
Catalytic assessment
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spelling Porous chitosan-based nanocomposites containing gold nanoparticles. Increasing the catalytic performance through film porosityDíaz Díaz, DavidBonardd, SebastiánRamírez, ÓscarAbarca, GabrielLeiva, ÁngelSaldías, CésarPorous nanocompositesThin-filmsChitosanGold nanoparticleCatalytic assessmentThe preparation of porous and non-porous chitosan thin-films containing gold nanoparticles was carried out, aiming to evaluate the effect of porosity on their catalytic response using the p-nitrophenol reduction as model reaction. To achieve this, both types of samples were decorated with gold nanoparticles having similar characteristics in terms of amount, size and shape, which were synthesized following a two-step adsorption-reduction process. The results demonstrated that the presence of porosity generates a considerable enhancement of the catalytic property. This behavior is reflected in higher kinetic constant and conversion values, along with a better recyclability after consecutive cycles. The inclusion of porosity in nanocomposites afforded kobs values 7.5 times higher than the non-porous material, as well as conversion values as high as 80 % in <20 min. On the other hand, as an additional experiment, a porous sample prepared with half the amount of gold also exhibited a better performance than the non-porous catalyst, revealing that the porosity allowed to decrease the amount of catalytic metal used and still exhibiting kobs values 5.9 times higher than the non-porous specimen. These studies demonstrate that there is an important synergistic support-nanostructure relationship, which strongly influences the performance of the nanomaterial.Elsevier202520252022info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://riull.ull.es/xmlui/handle/915/42210reponame:RIULL. Repositorio Institucional de la Universidad de La Lagunainstname:Universidad de La Laguna (ULL)InglésInternational Journal of Biological Macromolecules;217, 2022Atribución/Reconocimiento-NoComercial-SinDerivados 4.0 Internacionalhttps://creativecommons.org/licenses/by-nc-nd/4.0/info:eu-repo/semantics/openAccessoai:riull.ull.es:915/422102026-06-22T13:13:57Z
dc.title.none.fl_str_mv Porous chitosan-based nanocomposites containing gold nanoparticles. Increasing the catalytic performance through film porosity
title Porous chitosan-based nanocomposites containing gold nanoparticles. Increasing the catalytic performance through film porosity
spellingShingle Porous chitosan-based nanocomposites containing gold nanoparticles. Increasing the catalytic performance through film porosity
Díaz Díaz, David
Porous nanocomposites
Thin-films
Chitosan
Gold nanoparticle
Catalytic assessment
title_short Porous chitosan-based nanocomposites containing gold nanoparticles. Increasing the catalytic performance through film porosity
title_full Porous chitosan-based nanocomposites containing gold nanoparticles. Increasing the catalytic performance through film porosity
title_fullStr Porous chitosan-based nanocomposites containing gold nanoparticles. Increasing the catalytic performance through film porosity
title_full_unstemmed Porous chitosan-based nanocomposites containing gold nanoparticles. Increasing the catalytic performance through film porosity
title_sort Porous chitosan-based nanocomposites containing gold nanoparticles. Increasing the catalytic performance through film porosity
dc.creator.none.fl_str_mv Díaz Díaz, David
Bonardd, Sebastián
Ramírez, Óscar
Abarca, Gabriel
Leiva, Ángel
Saldías, César
author Díaz Díaz, David
author_facet Díaz Díaz, David
Bonardd, Sebastián
Ramírez, Óscar
Abarca, Gabriel
Leiva, Ángel
Saldías, César
author_role author
author2 Bonardd, Sebastián
Ramírez, Óscar
Abarca, Gabriel
Leiva, Ángel
Saldías, César
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Porous nanocomposites
Thin-films
Chitosan
Gold nanoparticle
Catalytic assessment
topic Porous nanocomposites
Thin-films
Chitosan
Gold nanoparticle
Catalytic assessment
description The preparation of porous and non-porous chitosan thin-films containing gold nanoparticles was carried out, aiming to evaluate the effect of porosity on their catalytic response using the p-nitrophenol reduction as model reaction. To achieve this, both types of samples were decorated with gold nanoparticles having similar characteristics in terms of amount, size and shape, which were synthesized following a two-step adsorption-reduction process. The results demonstrated that the presence of porosity generates a considerable enhancement of the catalytic property. This behavior is reflected in higher kinetic constant and conversion values, along with a better recyclability after consecutive cycles. The inclusion of porosity in nanocomposites afforded kobs values 7.5 times higher than the non-porous material, as well as conversion values as high as 80 % in <20 min. On the other hand, as an additional experiment, a porous sample prepared with half the amount of gold also exhibited a better performance than the non-porous catalyst, revealing that the porosity allowed to decrease the amount of catalytic metal used and still exhibiting kobs values 5.9 times higher than the non-porous specimen. These studies demonstrate that there is an important synergistic support-nanostructure relationship, which strongly influences the performance of the nanomaterial.
publishDate 2022
dc.date.none.fl_str_mv 2022
2025
2025
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://riull.ull.es/xmlui/handle/915/42210
url http://riull.ull.es/xmlui/handle/915/42210
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv International Journal of Biological Macromolecules;217, 2022
dc.rights.none.fl_str_mv Atribución/Reconocimiento-NoComercial-SinDerivados 4.0 Internacional
https://creativecommons.org/licenses/by-nc-nd/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Atribución/Reconocimiento-NoComercial-SinDerivados 4.0 Internacional
https://creativecommons.org/licenses/by-nc-nd/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RIULL. Repositorio Institucional de la Universidad de La Laguna
instname:Universidad de La Laguna (ULL)
instname_str Universidad de La Laguna (ULL)
reponame_str RIULL. Repositorio Institucional de la Universidad de La Laguna
collection RIULL. Repositorio Institucional de la Universidad de La Laguna
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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