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Ultrathin‐Film Titania Photocatalyst on Nanocavity for CO(2) Reduction with Boosted Catalytic Efficiencies
Photocatalytic CO(2) reduction with water to hydrocarbons represents a viable and sustainable process toward greenhouse gas reduction and fuel/chemical production. Development of more efficient catalysts is the key to mitigate the limits in photocatalytic processes. Here, a novel ultrathin‐film phot...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6282774/ https://www.ncbi.nlm.nih.gov/pubmed/30546916 http://dx.doi.org/10.1002/gch2.201800032 |
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author | Song, Haomin Wu, Wei Liang, Jian‐Wei Maity, Partha Shu, Yuying Wang, Nam Sun Mohammed, Omar F. Ooi, Boon S. Gan, Qiaoqiang Liu, Dongxia |
author_facet | Song, Haomin Wu, Wei Liang, Jian‐Wei Maity, Partha Shu, Yuying Wang, Nam Sun Mohammed, Omar F. Ooi, Boon S. Gan, Qiaoqiang Liu, Dongxia |
author_sort | Song, Haomin |
collection | PubMed |
description | Photocatalytic CO(2) reduction with water to hydrocarbons represents a viable and sustainable process toward greenhouse gas reduction and fuel/chemical production. Development of more efficient catalysts is the key to mitigate the limits in photocatalytic processes. Here, a novel ultrathin‐film photocatalytic light absorber (UFPLA) with TiO(2) films to design efficient photocatalytic CO(2) conversion processes is created. The UFPLA structure conquers the intrinsic trade‐off between optical absorption and charge carrier extraction efficiency, that is, a solar absorber should be thick enough to absorb majority of the light allowable by its bandgap but thin enough to allow charge carrier extraction for reactions. The as‐obtained structures significantly improve TiO(2) photocatalytic activity and selectivity to oxygenated hydrocarbons than the benchmark photocatalyst (Aeroxide P25). Remarkably, UFPLAs with 2‐nm‐thick TiO(2) films result in hydrocarbon formation rates of 0.967 mmol g(−1) h(−1), corresponding to 1145 times higher activity than Aeroxide P25. This observation is confirmed by femtosecond transient absorption spectroscopic experiments where longer charge carrier lifetimes are recorded for the thinner films. The current work demonstrates a powerful strategy to control light absorption and catalysis in CO(2) conversion and, therefore, creates new and transformative ways of converting solar energy and greenhouse gas to alcohol fuels/chemicals. |
format | Online Article Text |
id | pubmed-6282774 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-62827742018-12-11 Ultrathin‐Film Titania Photocatalyst on Nanocavity for CO(2) Reduction with Boosted Catalytic Efficiencies Song, Haomin Wu, Wei Liang, Jian‐Wei Maity, Partha Shu, Yuying Wang, Nam Sun Mohammed, Omar F. Ooi, Boon S. Gan, Qiaoqiang Liu, Dongxia Glob Chall Full Papers Photocatalytic CO(2) reduction with water to hydrocarbons represents a viable and sustainable process toward greenhouse gas reduction and fuel/chemical production. Development of more efficient catalysts is the key to mitigate the limits in photocatalytic processes. Here, a novel ultrathin‐film photocatalytic light absorber (UFPLA) with TiO(2) films to design efficient photocatalytic CO(2) conversion processes is created. The UFPLA structure conquers the intrinsic trade‐off between optical absorption and charge carrier extraction efficiency, that is, a solar absorber should be thick enough to absorb majority of the light allowable by its bandgap but thin enough to allow charge carrier extraction for reactions. The as‐obtained structures significantly improve TiO(2) photocatalytic activity and selectivity to oxygenated hydrocarbons than the benchmark photocatalyst (Aeroxide P25). Remarkably, UFPLAs with 2‐nm‐thick TiO(2) films result in hydrocarbon formation rates of 0.967 mmol g(−1) h(−1), corresponding to 1145 times higher activity than Aeroxide P25. This observation is confirmed by femtosecond transient absorption spectroscopic experiments where longer charge carrier lifetimes are recorded for the thinner films. The current work demonstrates a powerful strategy to control light absorption and catalysis in CO(2) conversion and, therefore, creates new and transformative ways of converting solar energy and greenhouse gas to alcohol fuels/chemicals. John Wiley and Sons Inc. 2018-09-19 /pmc/articles/PMC6282774/ /pubmed/30546916 http://dx.doi.org/10.1002/gch2.201800032 Text en © 2018 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Full Papers Song, Haomin Wu, Wei Liang, Jian‐Wei Maity, Partha Shu, Yuying Wang, Nam Sun Mohammed, Omar F. Ooi, Boon S. Gan, Qiaoqiang Liu, Dongxia Ultrathin‐Film Titania Photocatalyst on Nanocavity for CO(2) Reduction with Boosted Catalytic Efficiencies |
title | Ultrathin‐Film Titania Photocatalyst on Nanocavity for CO(2) Reduction with Boosted Catalytic Efficiencies |
title_full | Ultrathin‐Film Titania Photocatalyst on Nanocavity for CO(2) Reduction with Boosted Catalytic Efficiencies |
title_fullStr | Ultrathin‐Film Titania Photocatalyst on Nanocavity for CO(2) Reduction with Boosted Catalytic Efficiencies |
title_full_unstemmed | Ultrathin‐Film Titania Photocatalyst on Nanocavity for CO(2) Reduction with Boosted Catalytic Efficiencies |
title_short | Ultrathin‐Film Titania Photocatalyst on Nanocavity for CO(2) Reduction with Boosted Catalytic Efficiencies |
title_sort | ultrathin‐film titania photocatalyst on nanocavity for co(2) reduction with boosted catalytic efficiencies |
topic | Full Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6282774/ https://www.ncbi.nlm.nih.gov/pubmed/30546916 http://dx.doi.org/10.1002/gch2.201800032 |
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