Grey Rutile TiO(2) with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination

Colored titanium oxides are usually unstable in the atmosphere. Herein, a gray rutile titanium dioxide is synthesized by two-step calcination successively in a high-temperature reduction atmosphere and in a lower-temperature air atmosphere. The as-synthesized gray rutile TiO(2) exhibits higher photo...

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Detalles Bibliográficos
Autores principales: Liu, Yan, Chen, Ping, Fan, Yaqi, Fan, Yanfei, Shi, Xifeng, Cui, Guanwei, Tang, Bo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Communication
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7279311/
https://www.ncbi.nlm.nih.gov/pubmed/32397483
http://dx.doi.org/10.3390/nano10050920
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author Liu, Yan
Chen, Ping
Fan, Yaqi
Fan, Yanfei
Shi, Xifeng
Cui, Guanwei
Tang, Bo
author_facet Liu, Yan
Chen, Ping
Fan, Yaqi
Fan, Yanfei
Shi, Xifeng
Cui, Guanwei
Tang, Bo
author_sort Liu, Yan
collection PubMed
description Colored titanium oxides are usually unstable in the atmosphere. Herein, a gray rutile titanium dioxide is synthesized by two-step calcination successively in a high-temperature reduction atmosphere and in a lower-temperature air atmosphere. The as-synthesized gray rutile TiO(2) exhibits higher photocatalytic activity than that of white rutile TiO(2) and shows high chemical stability. This is attributed to interior oxygen vacancies, which can improve the separation and transmission efficiency of the photogenerated carriers. Most notably, a formed surface passivation layer will protect the interior oxygen vacancies and provide long-term photocatalytic activity.
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spelling pubmed-72793112020-06-17 Grey Rutile TiO(2) with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination Liu, Yan Chen, Ping Fan, Yaqi Fan, Yanfei Shi, Xifeng Cui, Guanwei Tang, Bo Nanomaterials (Basel) Communication Colored titanium oxides are usually unstable in the atmosphere. Herein, a gray rutile titanium dioxide is synthesized by two-step calcination successively in a high-temperature reduction atmosphere and in a lower-temperature air atmosphere. The as-synthesized gray rutile TiO(2) exhibits higher photocatalytic activity than that of white rutile TiO(2) and shows high chemical stability. This is attributed to interior oxygen vacancies, which can improve the separation and transmission efficiency of the photogenerated carriers. Most notably, a formed surface passivation layer will protect the interior oxygen vacancies and provide long-term photocatalytic activity. MDPI 2020-05-09 /pmc/articles/PMC7279311/ /pubmed/32397483 http://dx.doi.org/10.3390/nano10050920 Text en © 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/).
spellingShingle Communication
Liu, Yan
Chen, Ping
Fan, Yaqi
Fan, Yanfei
Shi, Xifeng
Cui, Guanwei
Tang, Bo
Grey Rutile TiO(2) with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination
title Grey Rutile TiO(2) with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination
title_full Grey Rutile TiO(2) with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination
title_fullStr Grey Rutile TiO(2) with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination
title_full_unstemmed Grey Rutile TiO(2) with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination
title_short Grey Rutile TiO(2) with Long-Term Photocatalytic Activity Synthesized Via Two-Step Calcination
title_sort grey rutile tio(2) with long-term photocatalytic activity synthesized via two-step calcination
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7279311/
https://www.ncbi.nlm.nih.gov/pubmed/32397483
http://dx.doi.org/10.3390/nano10050920
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