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Surface-Enriched Boron-Doped TiO(2) Nanoparticles as Photocatalysts for Propene Oxidation
[Image: see text] A series of nanostructured boron-TiO(2) photocatalysts (B-X-TiO(2)-T) were prepared by sol–gel synthesis using titanium tetraisopropoxide and boric acid. The effects of the synthesis variables, boric acid amount (X) and crystallization temperature (T), on structural and electronic...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9513816/ https://www.ncbi.nlm.nih.gov/pubmed/36185169 http://dx.doi.org/10.1021/acsanm.2c02217 |
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author | Cano-Casanova, L. Ansón-Casaos, A. Hernández-Ferrer, J. Benito, A. M. Maser, W. K. Garro, N. Lillo-Ródenas, M. A. Román-Martínez, M. C. |
author_facet | Cano-Casanova, L. Ansón-Casaos, A. Hernández-Ferrer, J. Benito, A. M. Maser, W. K. Garro, N. Lillo-Ródenas, M. A. Román-Martínez, M. C. |
author_sort | Cano-Casanova, L. |
collection | PubMed |
description | [Image: see text] A series of nanostructured boron-TiO(2) photocatalysts (B-X-TiO(2)-T) were prepared by sol–gel synthesis using titanium tetraisopropoxide and boric acid. The effects of the synthesis variables, boric acid amount (X) and crystallization temperature (T), on structural and electronic properties and on the photocatalytic performance for propene oxidation, are studied. This reaction accounts for the remediation of pollution caused by volatile organic compounds, and it is carried out at low concentrations, a case in which efficient removal techniques are difficult and costly to implement. The presence of boric acid during the TiO(2) synthesis hinders the development of rutile without affecting the textural properties. X-ray photoelectron spectroscopy analysis reveals the interstitial incorporation of boron into the surface lattice of the TiO(2) nanostructure, while segregation of B(2)O(3) occurs in samples with high boron loading, also confirmed by X-ray diffraction. The best-performing photocatalysts are those with the lowest boron loading. Their high activity, outperforming the equivalent sample without boron, can be attributed to a high anatase and surface hydroxyl group content and efficient photo-charge separation (photoelectrochemical characterization, PEC), which can explain the suppression of visible photoluminescence (PL). Crystallization at 450 °C renders the most active sample, likely due to the development of a pure anatase structure with a large surface boron enrichment. A shift in the wavelength-dependent activity profile (PEC data) and the lowest electron–hole recombination rate (PL data) are also observed for this sample. |
format | Online Article Text |
id | pubmed-9513816 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-95138162022-09-28 Surface-Enriched Boron-Doped TiO(2) Nanoparticles as Photocatalysts for Propene Oxidation Cano-Casanova, L. Ansón-Casaos, A. Hernández-Ferrer, J. Benito, A. M. Maser, W. K. Garro, N. Lillo-Ródenas, M. A. Román-Martínez, M. C. ACS Appl Nano Mater [Image: see text] A series of nanostructured boron-TiO(2) photocatalysts (B-X-TiO(2)-T) were prepared by sol–gel synthesis using titanium tetraisopropoxide and boric acid. The effects of the synthesis variables, boric acid amount (X) and crystallization temperature (T), on structural and electronic properties and on the photocatalytic performance for propene oxidation, are studied. This reaction accounts for the remediation of pollution caused by volatile organic compounds, and it is carried out at low concentrations, a case in which efficient removal techniques are difficult and costly to implement. The presence of boric acid during the TiO(2) synthesis hinders the development of rutile without affecting the textural properties. X-ray photoelectron spectroscopy analysis reveals the interstitial incorporation of boron into the surface lattice of the TiO(2) nanostructure, while segregation of B(2)O(3) occurs in samples with high boron loading, also confirmed by X-ray diffraction. The best-performing photocatalysts are those with the lowest boron loading. Their high activity, outperforming the equivalent sample without boron, can be attributed to a high anatase and surface hydroxyl group content and efficient photo-charge separation (photoelectrochemical characterization, PEC), which can explain the suppression of visible photoluminescence (PL). Crystallization at 450 °C renders the most active sample, likely due to the development of a pure anatase structure with a large surface boron enrichment. A shift in the wavelength-dependent activity profile (PEC data) and the lowest electron–hole recombination rate (PL data) are also observed for this sample. American Chemical Society 2022-08-24 2022-09-23 /pmc/articles/PMC9513816/ /pubmed/36185169 http://dx.doi.org/10.1021/acsanm.2c02217 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Cano-Casanova, L. Ansón-Casaos, A. Hernández-Ferrer, J. Benito, A. M. Maser, W. K. Garro, N. Lillo-Ródenas, M. A. Román-Martínez, M. C. Surface-Enriched Boron-Doped TiO(2) Nanoparticles as Photocatalysts for Propene Oxidation |
title | Surface-Enriched
Boron-Doped TiO(2) Nanoparticles
as Photocatalysts for Propene Oxidation |
title_full | Surface-Enriched
Boron-Doped TiO(2) Nanoparticles
as Photocatalysts for Propene Oxidation |
title_fullStr | Surface-Enriched
Boron-Doped TiO(2) Nanoparticles
as Photocatalysts for Propene Oxidation |
title_full_unstemmed | Surface-Enriched
Boron-Doped TiO(2) Nanoparticles
as Photocatalysts for Propene Oxidation |
title_short | Surface-Enriched
Boron-Doped TiO(2) Nanoparticles
as Photocatalysts for Propene Oxidation |
title_sort | surface-enriched
boron-doped tio(2) nanoparticles
as photocatalysts for propene oxidation |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9513816/ https://www.ncbi.nlm.nih.gov/pubmed/36185169 http://dx.doi.org/10.1021/acsanm.2c02217 |
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