A red metallic oxide photocatalyst
Light absorption across the bandgap in semiconductors is exploited in many important applications such as photovoltaics, light emitting diodes and photocatalytic conversion. Metals differ from semiconductors in that there is no energy gap separating occupied and unoccupied levels; however, it is sti...
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th-cmuir.6653943832-514972018-09-04T06:14:45Z A red metallic oxide photocatalyst Xiaoxiang Xu Chamnan Randorn Paraskevi Efstathiou John T.S. Irvine Chemistry Engineering Materials Science Physics and Astronomy Light absorption across the bandgap in semiconductors is exploited in many important applications such as photovoltaics, light emitting diodes and photocatalytic conversion. Metals differ from semiconductors in that there is no energy gap separating occupied and unoccupied levels; however, it is still possible to excite electrons between bands. This is evidenced by materials with metallic properties that are also strongly coloured. An important question is whether such coloured metals could be used in light harvesting or similar applications. The high conductivity of a metal would preclude sufficient electric field being available to separate photocarriers; however, the high carrier mobility in a metal might also facilitate kinetic charge separation. Here we clearly demonstrate for the first time the use of a red metallic oxide, Sr1-xNbO3as an effective photocatalyst. The material has been used under visible light to photocatalyse the oxidation of methylene blue and both the oxidation and reduction of water assisted by appropriate sacrificial elements. © 2012 Macmillan Publishers Limited. All rights reserved. 2018-09-04T06:03:16Z 2018-09-04T06:03:16Z 2012-01-01 Journal 14764660 14761122 2-s2.0-84862696573 10.1038/nmat3312 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84862696573&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/51497 |
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Chemistry Engineering Materials Science Physics and Astronomy Xiaoxiang Xu Chamnan Randorn Paraskevi Efstathiou John T.S. Irvine A red metallic oxide photocatalyst |
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Light absorption across the bandgap in semiconductors is exploited in many important applications such as photovoltaics, light emitting diodes and photocatalytic conversion. Metals differ from semiconductors in that there is no energy gap separating occupied and unoccupied levels; however, it is still possible to excite electrons between bands. This is evidenced by materials with metallic properties that are also strongly coloured. An important question is whether such coloured metals could be used in light harvesting or similar applications. The high conductivity of a metal would preclude sufficient electric field being available to separate photocarriers; however, the high carrier mobility in a metal might also facilitate kinetic charge separation. Here we clearly demonstrate for the first time the use of a red metallic oxide, Sr1-xNbO3as an effective photocatalyst. The material has been used under visible light to photocatalyse the oxidation of methylene blue and both the oxidation and reduction of water assisted by appropriate sacrificial elements. © 2012 Macmillan Publishers Limited. All rights reserved. |
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Journal |
author |
Xiaoxiang Xu Chamnan Randorn Paraskevi Efstathiou John T.S. Irvine |
author_facet |
Xiaoxiang Xu Chamnan Randorn Paraskevi Efstathiou John T.S. Irvine |
author_sort |
Xiaoxiang Xu |
title |
A red metallic oxide photocatalyst |
title_short |
A red metallic oxide photocatalyst |
title_full |
A red metallic oxide photocatalyst |
title_fullStr |
A red metallic oxide photocatalyst |
title_full_unstemmed |
A red metallic oxide photocatalyst |
title_sort |
red metallic oxide photocatalyst |
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2018 |
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https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84862696573&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/51497 |
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