Heterostructural transformation of mesoporous silica–titania hybrids

Abstract Mesoporous silica (SBA-15 with the BJH pore size of 8 nm) containing anatase nanoparticles in the pore with two different titania contents (28 and 65 mass%), which were prepared by the infiltration of the amorphous precursor derived from tetraisopropyl orthotitanate into the pore, were heat...

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Autores principales:	Navarut Paengjun, Kasimanat Vibulyaseak, Makoto Ogawa
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3c45015dcc5846b7a7c27124f85a928a
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spelling	oai:doaj.org-article:3c45015dcc5846b7a7c27124f85a928a2021-12-02T14:06:51ZHeterostructural transformation of mesoporous silica–titania hybrids10.1038/s41598-020-80584-82045-2322https://doaj.org/article/3c45015dcc5846b7a7c27124f85a928a2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80584-8https://doaj.org/toc/2045-2322Abstract Mesoporous silica (SBA-15 with the BJH pore size of 8 nm) containing anatase nanoparticles in the pore with two different titania contents (28 and 65 mass%), which were prepared by the infiltration of the amorphous precursor derived from tetraisopropyl orthotitanate into the pore, were heat treated in air to investigate the structural changes (both mesostructure of the SBA-15 and the phase and size of the anatase in the pore). The mesostructure of the mesoporous silica and the particle size of anatase unchanged by the heat treatment up to 800 °C. The heat treatment at the temperature higher than 1000 °C resulted in the collapse of the mesostructure and the growth of anatase nanoparticles as well as the transformation to rutile, while the transformation of anatase to rutile was suppressed especially for the sample with the lower titania content (28 mass%). The resulting mesoporous silica-anatase hybrids exhibited higher benzene adsorption capacity (adsorption from water) over those heated at lower temperature, probably due to the dehydroxylation of the silanol group on the pore surface. The photocatalytic decomposition of benzene in water by the present hybrid heated at 1100 °C was efficient as that by P25, a benchmark photocatalyst.Navarut PaengjunKasimanat VibulyaseakMakoto OgawaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Navarut Paengjun Kasimanat Vibulyaseak Makoto Ogawa Heterostructural transformation of mesoporous silica–titania hybrids
description	Abstract Mesoporous silica (SBA-15 with the BJH pore size of 8 nm) containing anatase nanoparticles in the pore with two different titania contents (28 and 65 mass%), which were prepared by the infiltration of the amorphous precursor derived from tetraisopropyl orthotitanate into the pore, were heat treated in air to investigate the structural changes (both mesostructure of the SBA-15 and the phase and size of the anatase in the pore). The mesostructure of the mesoporous silica and the particle size of anatase unchanged by the heat treatment up to 800 °C. The heat treatment at the temperature higher than 1000 °C resulted in the collapse of the mesostructure and the growth of anatase nanoparticles as well as the transformation to rutile, while the transformation of anatase to rutile was suppressed especially for the sample with the lower titania content (28 mass%). The resulting mesoporous silica-anatase hybrids exhibited higher benzene adsorption capacity (adsorption from water) over those heated at lower temperature, probably due to the dehydroxylation of the silanol group on the pore surface. The photocatalytic decomposition of benzene in water by the present hybrid heated at 1100 °C was efficient as that by P25, a benchmark photocatalyst.
format	article
author	Navarut Paengjun Kasimanat Vibulyaseak Makoto Ogawa
author_facet	Navarut Paengjun Kasimanat Vibulyaseak Makoto Ogawa
author_sort	Navarut Paengjun
title	Heterostructural transformation of mesoporous silica–titania hybrids
title_short	Heterostructural transformation of mesoporous silica–titania hybrids
title_full	Heterostructural transformation of mesoporous silica–titania hybrids
title_fullStr	Heterostructural transformation of mesoporous silica–titania hybrids
title_full_unstemmed	Heterostructural transformation of mesoporous silica–titania hybrids
title_sort	heterostructural transformation of mesoporous silica–titania hybrids
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3c45015dcc5846b7a7c27124f85a928a
work_keys_str_mv	AT navarutpaengjun heterostructuraltransformationofmesoporoussilicatitaniahybrids AT kasimanatvibulyaseak heterostructuraltransformationofmesoporoussilicatitaniahybrids AT makotoogawa heterostructuraltransformationofmesoporoussilicatitaniahybrids
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Heterostructural transformation of mesoporous silica–titania hybrids

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