High {0 0 1} faceted TiO2 nanoparticles for the valorization of oxygenated compounds present in aqueous biomass-derived feedstocks

{0 0 1} faceted TiO2 catalysts are hydrothermally synthesized by using titanium(IV) isopropoxide and butoxide precursors (ISO and BUT TiO2 samples) together with HF addition. Their activity and stability are evaluated in the catalytic condensation of light oxygenated organic compounds present in an...

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Autores: Lara Angulo, Mayra Anabel, Fernández-Arroyo, Alberto, Domine, Marcelo, Sayagues, María, Navío, José Antonio, Hidalgo, María Carmen
Tipo de documento: artigo
Data de publicação:2018
País:España
Recursos:Universidad Loyola Andalucía
Repositório:Brújula
OAI Identifier:oai:repositorio.uloyola.es:20.500.12412/6530
Acesso em linha:https://hdl.handle.net/20.500.12412/6530
Access Level:Acceso aberto
Palavra-chave:{0 0 1} faceted TiO2
Bio-oils
Condensation
Oxygenated compounds
Aqueous effluents
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spelling High {0 0 1} faceted TiO2 nanoparticles for the valorization of oxygenated compounds present in aqueous biomass-derived feedstocksLara Angulo, Mayra AnabelFernández-Arroyo, AlbertoDomine, MarceloSayagues, MaríaNavío, José AntonioHidalgo, María Carmen{0 0 1} faceted TiO2Bio-oilsCondensationOxygenated compoundsAqueous effluents{0 0 1} faceted TiO2 catalysts are hydrothermally synthesized by using titanium(IV) isopropoxide and butoxide precursors (ISO and BUT TiO2 samples) together with HF addition. Their activity and stability are evaluated in the catalytic condensation of light oxygenated organic compounds present in an aqueous model mixture simulating a real bio-refinery effluent, under moderate operation conditions. High {0 0 1} faceted TiO2 catalysts show organic products yields superior to those attained with other TiO2 samples (anatase, rutile, and P25). This enhanced catalytic activity relates to their physico-chemical and textural properties, such as high surface area (≈100 m2/g), regular morphology (platelets conformed by partially agglomerated TiO2 nanoparticles), and adequate Lewis acidity. XRD and Raman measurements evidence the unique presence of anatase crystalline phase in both ISO and BUT materials, in which the use of HF during synthesis produces the preferential growth of TiO2 crystals mainly exposing the {0 0 1} plane. This effective {0 0 1} facet exposition directly determines catalytic results. Moreover, TiO2 ISO catalyst shows outstanding stability under reaction conditions, maintaining practically unaltered their activity after several re-uses. In particular, Lewis acid sites present in TiO2 faceted materials are more stable in the presence of organic acids under aqueous environments. This opens new possibilities for the application of these materials in the valorization of light oxygenated compounds present in biomass-derived aqueous effluents.Es la versión preprint del artículo. Se puede consultar la versión final en https://doi.org/10.1016/j.jcat.2017.12.018Financial support by Spanish Government (CTQ-2015-67592, CTQ-2015-68951-C3-1, CTQ-2015-64664-C2-2-P and SEV-2016- 0683)2018info:eu-repo/semantics/articlehttps://hdl.handle.net/20.500.12412/6530reponame:Brújulainstname:Universidad Loyola AndalucíaInglésinfo:eu-repo/semantics/openAccessoai:repositorio.uloyola.es:20.500.12412/65302026-06-24T12:48:37Z
dc.title.none.fl_str_mv High {0 0 1} faceted TiO2 nanoparticles for the valorization of oxygenated compounds present in aqueous biomass-derived feedstocks
title High {0 0 1} faceted TiO2 nanoparticles for the valorization of oxygenated compounds present in aqueous biomass-derived feedstocks
spellingShingle High {0 0 1} faceted TiO2 nanoparticles for the valorization of oxygenated compounds present in aqueous biomass-derived feedstocks
Lara Angulo, Mayra Anabel
{0 0 1} faceted TiO2
Bio-oils
Condensation
Oxygenated compounds
Aqueous effluents
title_short High {0 0 1} faceted TiO2 nanoparticles for the valorization of oxygenated compounds present in aqueous biomass-derived feedstocks
title_full High {0 0 1} faceted TiO2 nanoparticles for the valorization of oxygenated compounds present in aqueous biomass-derived feedstocks
title_fullStr High {0 0 1} faceted TiO2 nanoparticles for the valorization of oxygenated compounds present in aqueous biomass-derived feedstocks
title_full_unstemmed High {0 0 1} faceted TiO2 nanoparticles for the valorization of oxygenated compounds present in aqueous biomass-derived feedstocks
title_sort High {0 0 1} faceted TiO2 nanoparticles for the valorization of oxygenated compounds present in aqueous biomass-derived feedstocks
dc.creator.none.fl_str_mv Lara Angulo, Mayra Anabel
Fernández-Arroyo, Alberto
Domine, Marcelo
Sayagues, María
Navío, José Antonio
Hidalgo, María Carmen
author Lara Angulo, Mayra Anabel
author_facet Lara Angulo, Mayra Anabel
Fernández-Arroyo, Alberto
Domine, Marcelo
Sayagues, María
Navío, José Antonio
Hidalgo, María Carmen
author_role author
author2 Fernández-Arroyo, Alberto
Domine, Marcelo
Sayagues, María
Navío, José Antonio
Hidalgo, María Carmen
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv {0 0 1} faceted TiO2
Bio-oils
Condensation
Oxygenated compounds
Aqueous effluents
topic {0 0 1} faceted TiO2
Bio-oils
Condensation
Oxygenated compounds
Aqueous effluents
description {0 0 1} faceted TiO2 catalysts are hydrothermally synthesized by using titanium(IV) isopropoxide and butoxide precursors (ISO and BUT TiO2 samples) together with HF addition. Their activity and stability are evaluated in the catalytic condensation of light oxygenated organic compounds present in an aqueous model mixture simulating a real bio-refinery effluent, under moderate operation conditions. High {0 0 1} faceted TiO2 catalysts show organic products yields superior to those attained with other TiO2 samples (anatase, rutile, and P25). This enhanced catalytic activity relates to their physico-chemical and textural properties, such as high surface area (≈100 m2/g), regular morphology (platelets conformed by partially agglomerated TiO2 nanoparticles), and adequate Lewis acidity. XRD and Raman measurements evidence the unique presence of anatase crystalline phase in both ISO and BUT materials, in which the use of HF during synthesis produces the preferential growth of TiO2 crystals mainly exposing the {0 0 1} plane. This effective {0 0 1} facet exposition directly determines catalytic results. Moreover, TiO2 ISO catalyst shows outstanding stability under reaction conditions, maintaining practically unaltered their activity after several re-uses. In particular, Lewis acid sites present in TiO2 faceted materials are more stable in the presence of organic acids under aqueous environments. This opens new possibilities for the application of these materials in the valorization of light oxygenated compounds present in biomass-derived aqueous effluents.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.12412/6530
url https://hdl.handle.net/20.500.12412/6530
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Brújula
instname:Universidad Loyola Andalucía
instname_str Universidad Loyola Andalucía
reponame_str Brújula
collection Brújula
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869405474578759680
score 15.223283

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