Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/113821
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Full metadata record
DC Field | Value | Language |
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dc.contributor.author | Lim, S. | - |
dc.contributor.author | Law, C. | - |
dc.contributor.author | Markovic, M. | - |
dc.contributor.author | Kirby, J. | - |
dc.contributor.author | Abell, A. | - |
dc.contributor.author | Santos, A. | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | ACS Applied Materials and Interfaces, 2018; 10(28):24124-24136 | - |
dc.identifier.issn | 1944-8244 | - |
dc.identifier.issn | 1944-8252 | - |
dc.identifier.uri | http://hdl.handle.net/2440/113821 | - |
dc.description | Published: June 25, 2018 | - |
dc.description.abstract | In this study, we explore for the first time the capabilities of nanoporous anodic alumina gradient-index filters (NAA-GIFs) functionalized with titanium dioxide (TiO₂) photoactive layers to enhance photon-to-electron conversion rates and improve the efficiency of photocatalytic reactions by “slow photon” effect. A set of NAA-GIFs was fabricated by sinusoidal pulse anodization, in which a systematic modification of various anodization parameters (i.e., pore widening time, anodization period, and anodization time) enables the fine-tuning of the photonic stopband (PSB) of these nanoporous photonic crystals (PCs) across the spectral regions. The surface of NAA-GIFs was chemically modified with photoactive layers of TiO₂ to create a composite photoactive material with precisely engineered optical properties. The photocatalytic performance of TiO₂-functionalized NAA-GIFs was assessed by studying the photodegradation of three model organic dyes (i.e., methyl orange, Rhodamine B, and methylene blue) with well-defined absorption bands across different spectral regions under simulated irradiation conditions. Our study demonstrates that when the edges of characteristic PSB of TiO₂-modified NAA-GIFs are completely or partially aligned with the absorption band of the organic dyes, the photodegradation rate is enhanced due to “slow photon” effect. A rational design of the photocatalyst material with respect to the organic dye is demonstrated to be optimal to speed up photocatalytic reactions by an efficient management of photons from high-irradiance spectral regions. This provides new opportunities to develop high-performing photocatalytic materials for efficient photocatalysis with broad applicability. | - |
dc.description.statementofresponsibility | Siew Yee Lim, Cheryl Suwen Law, Marijana Markovic, Jason K. Kirby, Andrew D. Abell, and Abel Santos | - |
dc.language.iso | en | - |
dc.publisher | American Chemical Society | - |
dc.rights | © 2018 American Chemical Society | - |
dc.source.uri | http://dx.doi.org/10.1021/acsami.8b05946 | - |
dc.subject | Nanoporous anodic alumina; photonic crystals; slow photon effect; surface-modification; photocatalysis | - |
dc.title | Engineering the slow photon effect in photoactive nanoporous anodic alumina gradient-index filters for photocatalysis | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1021/acsami.8b05946 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/DE140100549 | - |
dc.relation.grant | http://purl.org/au-research/grants/arc/CE140100003 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Lim, S. [0000-0002-5677-9039] | - |
dc.identifier.orcid | Law, C. [0000-0002-3276-8052] | - |
dc.identifier.orcid | Markovic, M. [0000-0003-0040-6249] | - |
dc.identifier.orcid | Abell, A. [0000-0002-0604-2629] | - |
dc.identifier.orcid | Santos, A. [0000-0002-5081-5684] | - |
Appears in Collections: | Aurora harvest 3 IPAS publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_113821.pdf | Accepted version | 9.31 MB | Adobe PDF | View/Open |
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