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Photocatalytic hydrogen generation of monolithic porous titanium oxide-based glass–ceramics
A large relative surface area is crucial for high catalytic activity. Monolithic catalysts are important catalytic materials because of minimal self-degradation. Regarding large surface area catalysts, the glass–ceramics (GCs) with high formability, obtained by heat-treatment of the precursor glass,...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7363924/ https://www.ncbi.nlm.nih.gov/pubmed/32669584 http://dx.doi.org/10.1038/s41598-020-68410-7 |
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author | Masai, Hirokazu Sakurai, Hiroaki Koreeda, Akitoshi Fujii, Yasuhiro Ohkubo, Takahiro Miyazaki, Takamichi Akai, Tomoko |
author_facet | Masai, Hirokazu Sakurai, Hiroaki Koreeda, Akitoshi Fujii, Yasuhiro Ohkubo, Takahiro Miyazaki, Takamichi Akai, Tomoko |
author_sort | Masai, Hirokazu |
collection | PubMed |
description | A large relative surface area is crucial for high catalytic activity. Monolithic catalysts are important catalytic materials because of minimal self-degradation. Regarding large surface area catalysts, the glass–ceramics (GCs) with high formability, obtained by heat-treatment of the precursor glass, are plausible candidates. This study examines the photocatalytic behaviour of porous GCs obtained after acid leaching of MgO–TiO(2)–P(2)O(5) GCs. After heat-treatment, anatase TiO(2) was precipitated along with other phases. The diffraction intensity ratio between anatase and other phases was the maximum for a heat-treatment temperature of 900 °C. After acid leaching of the GCs, the relative surface area decreased with increasing TiO(2) fraction; the surface area was also affected by the sample morphology. H(2) generation was observed from porous GCs, while GCs without etching exhibited approximately zero activity. Thus, it was demonstrated that high surface area and prevention of the reduction reaction to Ti(III) are important for tailoring monolithic photocatalytic materials. |
format | Online Article Text |
id | pubmed-7363924 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-73639242020-07-17 Photocatalytic hydrogen generation of monolithic porous titanium oxide-based glass–ceramics Masai, Hirokazu Sakurai, Hiroaki Koreeda, Akitoshi Fujii, Yasuhiro Ohkubo, Takahiro Miyazaki, Takamichi Akai, Tomoko Sci Rep Article A large relative surface area is crucial for high catalytic activity. Monolithic catalysts are important catalytic materials because of minimal self-degradation. Regarding large surface area catalysts, the glass–ceramics (GCs) with high formability, obtained by heat-treatment of the precursor glass, are plausible candidates. This study examines the photocatalytic behaviour of porous GCs obtained after acid leaching of MgO–TiO(2)–P(2)O(5) GCs. After heat-treatment, anatase TiO(2) was precipitated along with other phases. The diffraction intensity ratio between anatase and other phases was the maximum for a heat-treatment temperature of 900 °C. After acid leaching of the GCs, the relative surface area decreased with increasing TiO(2) fraction; the surface area was also affected by the sample morphology. H(2) generation was observed from porous GCs, while GCs without etching exhibited approximately zero activity. Thus, it was demonstrated that high surface area and prevention of the reduction reaction to Ti(III) are important for tailoring monolithic photocatalytic materials. Nature Publishing Group UK 2020-07-15 /pmc/articles/PMC7363924/ /pubmed/32669584 http://dx.doi.org/10.1038/s41598-020-68410-7 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Masai, Hirokazu Sakurai, Hiroaki Koreeda, Akitoshi Fujii, Yasuhiro Ohkubo, Takahiro Miyazaki, Takamichi Akai, Tomoko Photocatalytic hydrogen generation of monolithic porous titanium oxide-based glass–ceramics |
title | Photocatalytic hydrogen generation of monolithic porous titanium oxide-based glass–ceramics |
title_full | Photocatalytic hydrogen generation of monolithic porous titanium oxide-based glass–ceramics |
title_fullStr | Photocatalytic hydrogen generation of monolithic porous titanium oxide-based glass–ceramics |
title_full_unstemmed | Photocatalytic hydrogen generation of monolithic porous titanium oxide-based glass–ceramics |
title_short | Photocatalytic hydrogen generation of monolithic porous titanium oxide-based glass–ceramics |
title_sort | photocatalytic hydrogen generation of monolithic porous titanium oxide-based glass–ceramics |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7363924/ https://www.ncbi.nlm.nih.gov/pubmed/32669584 http://dx.doi.org/10.1038/s41598-020-68410-7 |
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