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Effect of Vacuum-Sealed Annealing and Ice-Water Quenching on the Structure and Photocatalytic Acetone Oxidations of Nano-TiO(2) Materials

[Image: see text] In the current research, P25 TiO(2) materials sealed in quartz vacuum tubes were subject to annealing and ice-water post-quenching, with the effects on TiO(2) structures, morphology, and photocatalytic activity being studied. It is shown that the vacuum-sealed annealing can lead to...

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Autores principales: Wen, Liping, Liu, Yao, Liu, Yong, Xu, Yuping, Liu, Baoshun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9730761/
https://www.ncbi.nlm.nih.gov/pubmed/36506168
http://dx.doi.org/10.1021/acsomega.2c04695
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author Wen, Liping
Liu, Yao
Liu, Yong
Xu, Yuping
Liu, Baoshun
author_facet Wen, Liping
Liu, Yao
Liu, Yong
Xu, Yuping
Liu, Baoshun
author_sort Wen, Liping
collection PubMed
description [Image: see text] In the current research, P25 TiO(2) materials sealed in quartz vacuum tubes were subject to annealing and ice-water post-quenching, with the effects on TiO(2) structures, morphology, and photocatalytic activity being studied. It is shown that the vacuum-sealed annealing can lead to a decrease in the crystallinity and temperature of anatase-to-rutile phase transition. A disorder layer is formed over TiO(2) nanoparticles, and the TiO(2) lattices are distorted between the disorder layer and crystalline core. The ice-water post-quenching almost has no effect on the crystalline structure and morphology of TiO(2). It can be seen that the vacuum-sealed annealing can generate more defects, and the electrons are mainly localized at lattice Ti sites, as well as the percentage of bulk oxygen defects is also increased. Although further ice-water post-quenching can introduce more defects in TiO(2), it does not affect the electron localization and defect distribution. The vacuum-sealed annealing process can increase the photocatalytic acetone oxidations of the anatase phase TiO(2) to some extent, possibly because of the defect generation and Ti(3+) site formation; the further ice-water quenching leads to a decrease in the photocatalytic activity because more defects are introduced.
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spelling pubmed-97307612022-12-09 Effect of Vacuum-Sealed Annealing and Ice-Water Quenching on the Structure and Photocatalytic Acetone Oxidations of Nano-TiO(2) Materials Wen, Liping Liu, Yao Liu, Yong Xu, Yuping Liu, Baoshun ACS Omega [Image: see text] In the current research, P25 TiO(2) materials sealed in quartz vacuum tubes were subject to annealing and ice-water post-quenching, with the effects on TiO(2) structures, morphology, and photocatalytic activity being studied. It is shown that the vacuum-sealed annealing can lead to a decrease in the crystallinity and temperature of anatase-to-rutile phase transition. A disorder layer is formed over TiO(2) nanoparticles, and the TiO(2) lattices are distorted between the disorder layer and crystalline core. The ice-water post-quenching almost has no effect on the crystalline structure and morphology of TiO(2). It can be seen that the vacuum-sealed annealing can generate more defects, and the electrons are mainly localized at lattice Ti sites, as well as the percentage of bulk oxygen defects is also increased. Although further ice-water post-quenching can introduce more defects in TiO(2), it does not affect the electron localization and defect distribution. The vacuum-sealed annealing process can increase the photocatalytic acetone oxidations of the anatase phase TiO(2) to some extent, possibly because of the defect generation and Ti(3+) site formation; the further ice-water quenching leads to a decrease in the photocatalytic activity because more defects are introduced. American Chemical Society 2022-11-17 /pmc/articles/PMC9730761/ /pubmed/36506168 http://dx.doi.org/10.1021/acsomega.2c04695 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Wen, Liping
Liu, Yao
Liu, Yong
Xu, Yuping
Liu, Baoshun
Effect of Vacuum-Sealed Annealing and Ice-Water Quenching on the Structure and Photocatalytic Acetone Oxidations of Nano-TiO(2) Materials
title Effect of Vacuum-Sealed Annealing and Ice-Water Quenching on the Structure and Photocatalytic Acetone Oxidations of Nano-TiO(2) Materials
title_full Effect of Vacuum-Sealed Annealing and Ice-Water Quenching on the Structure and Photocatalytic Acetone Oxidations of Nano-TiO(2) Materials
title_fullStr Effect of Vacuum-Sealed Annealing and Ice-Water Quenching on the Structure and Photocatalytic Acetone Oxidations of Nano-TiO(2) Materials
title_full_unstemmed Effect of Vacuum-Sealed Annealing and Ice-Water Quenching on the Structure and Photocatalytic Acetone Oxidations of Nano-TiO(2) Materials
title_short Effect of Vacuum-Sealed Annealing and Ice-Water Quenching on the Structure and Photocatalytic Acetone Oxidations of Nano-TiO(2) Materials
title_sort effect of vacuum-sealed annealing and ice-water quenching on the structure and photocatalytic acetone oxidations of nano-tio(2) materials
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9730761/
https://www.ncbi.nlm.nih.gov/pubmed/36506168
http://dx.doi.org/10.1021/acsomega.2c04695
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