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https://hdl.handle.net/2440/106914
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Type: | Journal article |
Title: | Counteracting blueshift optical absorption and maximizing photon harvest in carbon nitride nanosheet photocatalyst |
Author: | Rahman, M. Davey, K. Qiao, S. |
Citation: | Small, 2017; 13(23):1-9 |
Publisher: | Wiley |
Issue Date: | 2017 |
ISSN: | 1613-6810 1613-6829 |
Statement of Responsibility: | Mohammad Rahman, Kenneth Davey, and Shi-Zhang Qiao |
Abstract: | Blueshift of optical absorption and corresponding widening of the bandgap is a fundamental problem with 2D carbon nitride nanosheets (CNNS). An additional problem is low quantum yields (<9%) due to higher loss of absorbed photons. These problems impose a significant restriction to photocatalytic performance of CNNS. Therefore, the synthesis of narrow bandgap CNNS with high quantum efficiency is of pressing research importance. This contribution reports melem-derived narrow bandgap CNNS with a record-low bandgap of 2.45 eV. The narrowing in bandgap comes with improved optical absorption and use of visible-light photons together with excellent charge transport dynamics. This is demonstrated by a record high hydrogen evolution rate of 863 µmol h-1 with apparent quantum efficiency of 16% at 420 nm. |
Keywords: | Carbon nitride; hydrogen production; nanosheets; narrow bandgap; photocatalysts |
Rights: | © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim |
DOI: | 10.1002/smll.201700376 |
Grant ID: | http://purl.org/au-research/grants/arc/DP130104459 http://purl.org/au-research/grants/arc/DP140104062 http://purl.org/au-research/grants/arc/DP160104866 http://purl.org/au-research/grants/arc/DP170104464 |
Published version: | http://dx.doi.org/10.1002/smll.201700376 |
Appears in Collections: | Aurora harvest 8 Chemical Engineering publications |
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