Photocatalytic Oxidation of Propane Using Hydrothermally Prepared Anatase-Brookite-Rutile TiO2 Samples. An In Situ DRIFTS Study
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http://hdl.handle.net/10045/108053
Títol: | Photocatalytic Oxidation of Propane Using Hydrothermally Prepared Anatase-Brookite-Rutile TiO2 Samples. An In Situ DRIFTS Study |
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Autors: | Cano-Casanova, Laura | Mei, Bastian | Mul, Guido | Lillo-Rodenas, Maria Angeles | Román-Martínez, M. Carmen |
Grups d'investigació o GITE: | Materiales Carbonosos y Medio Ambiente |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Paraules clau: | Propane photo-oxidation | DRIFTS analysis | Anatase-brookite-rutile TiO2 | Propane adsorption | Reaction intermediates |
Àrees de coneixement: | Química Inorgánica |
Data de publicació: | 4-de juliol-2020 |
Editor: | MDPI |
Citació bibliogràfica: | Cano-Casanova L, Mei B, Mul G, Lillo-Ródenas MÁ, Román-Martínez MC. Photocatalytic Oxidation of Propane Using Hydrothermally Prepared Anatase-Brookite-Rutile TiO2 Samples. An In Situ DRIFTS Study. Nanomaterials. 2020; 10(7):1314. doi:10.3390/nano10071314 |
Resum: | Photocatalytic oxidation of propane using hydrothermally synthesized TiO2 samples with similar primary crystal size containing different ratios of anatase, brookite and rutile phases has been studied by measuring light-induced propane conversion and in situ DRIFTS (diffuse reflectance Fourier transform infrared spectroscopy). Propane was found to adsorb on the photocatalysts, both in the absence and presence of light. The extent of adsorption depends on the phase composition of synthesized titania powders and, in general, it decreases with increasing rutile and brookite content. Still, the intrinsic activity for photocatalytic decomposition of propane is higher for photocatalysts with lower ability for propane adsorption, suggesting this is not the rate-limiting step. In situ DRIFTS analysis shows that bands related to adsorbed acetone, formate and bicarbonate species appear on the surface of the photocatalysts during illumination. Correlation of propane conversion and infrared (IR) data shows that the presence of formate and bicarbonate species, in excess with respect to acetone, is composition dependent, and results in relatively low activity of the respective TiO2. This study highlights the need for precise control of the phase composition to optimize rates in the photocatalytic oxidation of propane and a high rutile content seems to be favorable. |
Patrocinadors: | This research was by funded by GV/FEDER (PROMETEO/2018/076), MICINN and FEDER (RTI2018-095291-B-I00), University of Alicante (VIGROB-136 and Mobility Grants from the EDUA to facilitate obtaining the title of International Doctor). |
URI: | http://hdl.handle.net/10045/108053 |
ISSN: | 2079-4991 |
DOI: | 10.3390/nano10071314 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
Revisió científica: | si |
Versió de l'editor: | https://doi.org/10.3390/nano10071314 |
Apareix a la col·lecció: | INV - MCMA - Artículos de Revistas |
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Cano-Casanova_etal_2020_Nanomaterials.pdf | 1,72 MB | Adobe PDF | Obrir Vista prèvia | |
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