Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/109268
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DC Field | Value | Language |
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dc.contributor.author | Rahman, M. | - |
dc.contributor.author | Tapping, P. | - |
dc.contributor.author | Kee, T. | - |
dc.contributor.author | Smernik, R. | - |
dc.contributor.author | Spooner, N. | - |
dc.contributor.author | Moffatt, J. | - |
dc.contributor.author | Tang, Y. | - |
dc.contributor.author | Davey, K. | - |
dc.contributor.author | Qiao, S. | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | Advanced Functional Materials, 2017; 27(39):1702384-1-1702384-11 | - |
dc.identifier.issn | 1616-301X | - |
dc.identifier.issn | 1616-3028 | - |
dc.identifier.uri | http://hdl.handle.net/2440/109268 | - |
dc.description | Published online: August 14, 2017 | - |
dc.description.abstract | Amorphous carbon nitride (a-CN) is a less-explored but promising photocatalyst for hydrogen production. Despite an extended visible light absorption (EVLA) its low quantum efficiency (QE) for water photoreduction is a long standing problem. This implies that EVLA is not proportionally translated into collection of large amounts of photogenerated electrons. Minimizing the mismatch between light-absorption and charge-collection remains a scientific challenge. Here a sponge-like hierarchical structure of a-CN that addresses this apparent mismatch is reported. Combined experimental and finite difference time domain simulations demonstrate the ability of the a-CN sponge to induce scattering for total internal light reflection that promotes localized charge carrier generation. Diffused reflectance and transient fluorescence decay studies show good agreement with simulations with a 40% enhanced light-trapping and an ≈23 times longer electron lifetime in spongy a-CN compared with that of the bulk material. The result is a new high benchmark for hydrogen production of 203.5 µmol h⁻¹ with a QE of 6.1% at 420 nm in a reaction system of 10 vol% triethanolamine and 1 wt% Pt cocatalyst. The enhanced water photoreduction is a result of amenable photophysical and electrochemical attributes existing within the a-CN sponge. | - |
dc.description.statementofresponsibility | Mohammad Z. Rahman, Patrick C. Tapping, Tak W. Kee, Ronald Smernik, Nigel Spooner, Jillian Moffatt, Youhong Tang, Kenneth Davey, and Shi-Zhang Qiao | - |
dc.language.iso | en | - |
dc.publisher | John Wiley & Sons | - |
dc.rights | © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim | - |
dc.source.uri | http://dx.doi.org/10.1002/adfm.201702384 | - |
dc.subject | a-CN; carbon nitride sponge; hydrogen production; photocatalysis; water photoreduction | - |
dc.title | A benchmark quantum yield for water photoreduction on amorphous carbon nitride | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1002/adfm.201702384 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP140104062 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP160104866 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DP170104464 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Rahman, M. [0000-0003-3264-4778] | - |
dc.identifier.orcid | Tapping, P. [0000-0002-2359-1304] | - |
dc.identifier.orcid | Kee, T. [0000-0002-4907-4663] | - |
dc.identifier.orcid | Smernik, R. [0000-0001-6033-5855] | - |
dc.identifier.orcid | Spooner, N. [0000-0002-8534-3816] | - |
dc.identifier.orcid | Davey, K. [0000-0002-7623-9320] | - |
dc.identifier.orcid | Qiao, S. [0000-0002-1220-1761] [0000-0002-4568-8422] | - |
Appears in Collections: | Aurora harvest 3 Chemistry publications |
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File | Description | Size | Format | |
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hdl_109268.pdf | Submitted version | 1.18 MB | Adobe PDF | View/Open |
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