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Advanced titanium dioxide fluidizable nanowire photocatalysts

In photocatalytic water splitting, fluidization is known to minimize the adverse effects of mass-transfer, poor radiation distribution, parasitic back-reactions and photocatalyst handling difficulties, which limit the scalability of immobilized-film and suspended slurry photocatalysts. Fluidization...

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Autores principales: Reilly, Kevin, Adeli, Babak, Fang, Baizeng, Wilkinson, David P., Taghipour, Fariborz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8981402/
https://www.ncbi.nlm.nih.gov/pubmed/35425407
http://dx.doi.org/10.1039/d1ra07681g
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author Reilly, Kevin
Adeli, Babak
Fang, Baizeng
Wilkinson, David P.
Taghipour, Fariborz
author_facet Reilly, Kevin
Adeli, Babak
Fang, Baizeng
Wilkinson, David P.
Taghipour, Fariborz
author_sort Reilly, Kevin
collection PubMed
description In photocatalytic water splitting, fluidization is known to minimize the adverse effects of mass-transfer, poor radiation distribution, parasitic back-reactions and photocatalyst handling difficulties, which limit the scalability of immobilized-film and suspended slurry photocatalysts. Fluidization of one-dimensional TiO(2) photocatalyst particles, such as nanorods, -wires and -ribbons, is highly desired as it further enhances the efficiency of photocatalytic reaction, due to their peculiar photo-electrochemical characteristics that result in more effective separation of photo-generated charges and absorption of photons. However, the harsh physical environment of a fluidized bed reactor does not readily allow for nanostructured TiO(2) photocatalysts, as the fine features would be quickly removed from the particle surface. Here, we propose a scalable method for fabrication of rutile TiO(2) nanorods on porous glass beads as a 3D protective substrate to reduce the attrition rate caused by fluidization. The quality of the synthesized nanorod films was optimized through controlling a growth quality factor, R(q), allowing for good quality films to be grown in different batch amounts and different hydrothermal reactor sizes. The utilization of porous glass beads substrate has reduced the attrition rate, and the protective features of the particles reduced the rate of attrition by an order of magnitude, compared to a particulate photocatalyst, to near negligible levels. Such considerably reduced attrition makes the as-developed porous glass beads supported rutile TiO(2) nanorods a viable fluidizable photocatalyst candidate for various applications, including water splitting and degradation of organic compounds.
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spelling pubmed-89814022022-04-13 Advanced titanium dioxide fluidizable nanowire photocatalysts Reilly, Kevin Adeli, Babak Fang, Baizeng Wilkinson, David P. Taghipour, Fariborz RSC Adv Chemistry In photocatalytic water splitting, fluidization is known to minimize the adverse effects of mass-transfer, poor radiation distribution, parasitic back-reactions and photocatalyst handling difficulties, which limit the scalability of immobilized-film and suspended slurry photocatalysts. Fluidization of one-dimensional TiO(2) photocatalyst particles, such as nanorods, -wires and -ribbons, is highly desired as it further enhances the efficiency of photocatalytic reaction, due to their peculiar photo-electrochemical characteristics that result in more effective separation of photo-generated charges and absorption of photons. However, the harsh physical environment of a fluidized bed reactor does not readily allow for nanostructured TiO(2) photocatalysts, as the fine features would be quickly removed from the particle surface. Here, we propose a scalable method for fabrication of rutile TiO(2) nanorods on porous glass beads as a 3D protective substrate to reduce the attrition rate caused by fluidization. The quality of the synthesized nanorod films was optimized through controlling a growth quality factor, R(q), allowing for good quality films to be grown in different batch amounts and different hydrothermal reactor sizes. The utilization of porous glass beads substrate has reduced the attrition rate, and the protective features of the particles reduced the rate of attrition by an order of magnitude, compared to a particulate photocatalyst, to near negligible levels. Such considerably reduced attrition makes the as-developed porous glass beads supported rutile TiO(2) nanorods a viable fluidizable photocatalyst candidate for various applications, including water splitting and degradation of organic compounds. The Royal Society of Chemistry 2022-02-02 /pmc/articles/PMC8981402/ /pubmed/35425407 http://dx.doi.org/10.1039/d1ra07681g Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Reilly, Kevin
Adeli, Babak
Fang, Baizeng
Wilkinson, David P.
Taghipour, Fariborz
Advanced titanium dioxide fluidizable nanowire photocatalysts
title Advanced titanium dioxide fluidizable nanowire photocatalysts
title_full Advanced titanium dioxide fluidizable nanowire photocatalysts
title_fullStr Advanced titanium dioxide fluidizable nanowire photocatalysts
title_full_unstemmed Advanced titanium dioxide fluidizable nanowire photocatalysts
title_short Advanced titanium dioxide fluidizable nanowire photocatalysts
title_sort advanced titanium dioxide fluidizable nanowire photocatalysts
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8981402/
https://www.ncbi.nlm.nih.gov/pubmed/35425407
http://dx.doi.org/10.1039/d1ra07681g
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