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Synthesis and Optimization of Ti/Li/Al Ternary Layered Double Hydroxides for Efficient Photocatalytic Reduction of CO(2) to CH(4)

A series of Ti/Li/Al ternary layered double hydroxides (TiLiAl-LDHs) with different Ti:Li:Al molar ratios were prepared by a coprecipitation method for photocatalytic CO(2) reduction. It was demonstrated that the contents of anions between the layers of Ti/Li/Al-LDHs greatly determined the photocata...

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Autores principales: Kong, Ting-Ting, Huang, Jian, Jia, Xin-Gang, Wang, Wen-Zhen, Zhou, Yong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6449505/
https://www.ncbi.nlm.nih.gov/pubmed/30948734
http://dx.doi.org/10.1038/s41598-019-41979-4
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author Kong, Ting-Ting
Huang, Jian
Jia, Xin-Gang
Wang, Wen-Zhen
Zhou, Yong
author_facet Kong, Ting-Ting
Huang, Jian
Jia, Xin-Gang
Wang, Wen-Zhen
Zhou, Yong
author_sort Kong, Ting-Ting
collection PubMed
description A series of Ti/Li/Al ternary layered double hydroxides (TiLiAl-LDHs) with different Ti:Li:Al molar ratios were prepared by a coprecipitation method for photocatalytic CO(2) reduction. It was demonstrated that the contents of anions between the layers of Ti/Li/Al-LDHs greatly determined the photocatalytic activity for CO(2) reduction. With Ti:Li:Al molar ratios optimized to be 1:3:2, the largest contents of [Formula: see text] (−) anion and hydroxyl group were obtained for the Ti(1)Li(3)Al(2)-LDHs sample, which exhibited the highest photocatalytic activity for CO(2) reduction, with CH(4) production rate achieving 1.33 mmol h(−1) g(−1). Moreover, the theoretical calculations show that Ti(1)Li(3)Al(2)-LDHs is a p-type semiconductor with the narrowest band gap among all the obtained TiLiAl-LDHs. After calcined at high temperatures such as 700 °C, and the obtained TiLiAl-700 sample showed much increased photocatalytic activity for CO(2) reduction, with CH(4) production rate reaching about 1.59 mmol h(−1) g(−1). This calcination induced photocatalytic enhancement should be related to the cystal structure transformation from hydrotalcite to mixed oxides containing high reactive oxygen species for more efficient CO(2) reduction.
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spelling pubmed-64495052019-04-10 Synthesis and Optimization of Ti/Li/Al Ternary Layered Double Hydroxides for Efficient Photocatalytic Reduction of CO(2) to CH(4) Kong, Ting-Ting Huang, Jian Jia, Xin-Gang Wang, Wen-Zhen Zhou, Yong Sci Rep Article A series of Ti/Li/Al ternary layered double hydroxides (TiLiAl-LDHs) with different Ti:Li:Al molar ratios were prepared by a coprecipitation method for photocatalytic CO(2) reduction. It was demonstrated that the contents of anions between the layers of Ti/Li/Al-LDHs greatly determined the photocatalytic activity for CO(2) reduction. With Ti:Li:Al molar ratios optimized to be 1:3:2, the largest contents of [Formula: see text] (−) anion and hydroxyl group were obtained for the Ti(1)Li(3)Al(2)-LDHs sample, which exhibited the highest photocatalytic activity for CO(2) reduction, with CH(4) production rate achieving 1.33 mmol h(−1) g(−1). Moreover, the theoretical calculations show that Ti(1)Li(3)Al(2)-LDHs is a p-type semiconductor with the narrowest band gap among all the obtained TiLiAl-LDHs. After calcined at high temperatures such as 700 °C, and the obtained TiLiAl-700 sample showed much increased photocatalytic activity for CO(2) reduction, with CH(4) production rate reaching about 1.59 mmol h(−1) g(−1). This calcination induced photocatalytic enhancement should be related to the cystal structure transformation from hydrotalcite to mixed oxides containing high reactive oxygen species for more efficient CO(2) reduction. Nature Publishing Group UK 2019-04-04 /pmc/articles/PMC6449505/ /pubmed/30948734 http://dx.doi.org/10.1038/s41598-019-41979-4 Text en © The Author(s) 2019 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
Kong, Ting-Ting
Huang, Jian
Jia, Xin-Gang
Wang, Wen-Zhen
Zhou, Yong
Synthesis and Optimization of Ti/Li/Al Ternary Layered Double Hydroxides for Efficient Photocatalytic Reduction of CO(2) to CH(4)
title Synthesis and Optimization of Ti/Li/Al Ternary Layered Double Hydroxides for Efficient Photocatalytic Reduction of CO(2) to CH(4)
title_full Synthesis and Optimization of Ti/Li/Al Ternary Layered Double Hydroxides for Efficient Photocatalytic Reduction of CO(2) to CH(4)
title_fullStr Synthesis and Optimization of Ti/Li/Al Ternary Layered Double Hydroxides for Efficient Photocatalytic Reduction of CO(2) to CH(4)
title_full_unstemmed Synthesis and Optimization of Ti/Li/Al Ternary Layered Double Hydroxides for Efficient Photocatalytic Reduction of CO(2) to CH(4)
title_short Synthesis and Optimization of Ti/Li/Al Ternary Layered Double Hydroxides for Efficient Photocatalytic Reduction of CO(2) to CH(4)
title_sort synthesis and optimization of ti/li/al ternary layered double hydroxides for efficient photocatalytic reduction of co(2) to ch(4)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6449505/
https://www.ncbi.nlm.nih.gov/pubmed/30948734
http://dx.doi.org/10.1038/s41598-019-41979-4
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