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Lim SY, Hedrich C, Jiang L, Law CS, Chirumamilla M, Abell AD, Blick RH, Zierold R, Santos A. Harnessing Slow Light in Optoelectronically Engineered Nanoporous Photonic Crystals for Visible Light-Enhanced Photocatalysis. ACS Catal 2021. [DOI: 10.1021/acscatal.1c03320] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Siew Yee Lim
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, South Australia 5005, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Carina Hedrich
- Center for Hybrid Nanostructures, Universität Hamburg, Hamburg, Hamburg 22761, Germany
| | - Lin Jiang
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Cheryl Suwen Law
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, South Australia 5005, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Manohar Chirumamilla
- Institute of Optical and Electronic Materials, Hamburg University of Technology, Hamburg, Hamburg 21073, Germany
| | - Andrew D. Abell
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia 5005, Australia
- Department of Chemistry, The University of Adelaide, Adelaide, South Australia 5005, Australia
| | - Robert H. Blick
- Center for Hybrid Nanostructures, Universität Hamburg, Hamburg, Hamburg 22761, Germany
| | - Robert Zierold
- Center for Hybrid Nanostructures, Universität Hamburg, Hamburg, Hamburg 22761, Germany
| | - Abel Santos
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, South Australia 5005, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia 5005, Australia
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Peculiar Porous Aluminum Oxide Films Produced via Electrochemical Anodizing in Malonic Acid Solution with Arsenazo-I Additive. MATERIALS 2021; 14:ma14175118. [PMID: 34501208 PMCID: PMC8433957 DOI: 10.3390/ma14175118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 08/24/2021] [Accepted: 08/31/2021] [Indexed: 11/16/2022]
Abstract
The influence of arsenazo-I additive on electrochemical anodizing of pure aluminum foil in malonic acid was studied. Aluminum dissolution increased with increasing arsenazo-I concentration. The addition of arsenazo-I also led to an increase in the volume expansion factor up to 2.3 due to the incorporation of organic compounds and an increased number of hydroxyl groups in the porous aluminum oxide film. At a current density of 15 mA·cm−2 and an arsenazo-I concentration 3.5 g·L−1, the carbon content in the anodic alumina of 49 at. % was achieved. An increase in the current density and concentration of arsenazo-I caused the formation of an arsenic-containing compound with the formula Na1,5Al2(OH)4,5(AsO4)3·7H2O in the porous aluminum oxide film phase. These film modifications cause a higher number of defects and, thus, increase the ionic conductivity, leading to a reduced electric field in galvanostatic anodizing tests. A self-adjusting growth mechanism, which leads to a higher degree of self-ordering in the arsenazo-free electrolyte, is not operative under the same conditions when arsenazo-I is added. Instead, a dielectric breakdown mechanism was observed, which caused the disordered porous aluminum oxide film structure.
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Pligovka A, Poznyak A, Norek M. Optical Properties of Porous Alumina Assisted Niobia Nanostructured Films-Designing 2-D Photonic Crystals Based on Hexagonally Arranged Nanocolumns. MICROMACHINES 2021; 12:589. [PMID: 34063841 PMCID: PMC8223973 DOI: 10.3390/mi12060589] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/11/2021] [Accepted: 05/17/2021] [Indexed: 01/20/2023]
Abstract
Three types of niobia nanostructured films (so-called native, planarized, and column-like) were formed on glass substrates by porous alumina assisted anodizing in a 0.2 M aqueous solution of oxalic acid in a potentiostatic mode at a 53 V and then reanodizing in an electrolyte containing 0.5 M boric acid and 0.05 M sodium tetraborate in a potentiodynamic mode by raising the voltage to 230 V, and chemical post-processing. Anodic behaviors, morphology, and optical properties of the films have been investigated. The interference pattern of native film served as the basis for calculating the effective refractive index which varies within 1.75-1.54 in the wavelength range 190-1100 nm. Refractive index spectral characteristics made it possible to distinguish a number of absorbance bands of the native film. Based on the analysis of literature data, the identified oxide absorbance bands were assigned. The effective refractive index of native film was also calculated using the effective-medium models, and was in the range of 1.63-1.68. The reflectance spectra of all films show peaks in short- and long-wave regions. The presence of these peaks is due to the periodically varying refractive index in the layers of films in two dimensions. FDTD simulation was carried out and the morphology of a potential 2-D photonic crystal with 92% (wavelength 462 nm) reflectance, based on the third type of films, was proposed.
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Affiliation(s)
- Andrei Pligovka
- Research and Development Laboratory 4.10 “Nanotechnologies”, Belarusian State University of Informatics and Radioelectronics, 6 Brovki Str., 220013 Minsk, Belarus;
- Department of Micro- and Nanoelectronics, Belarusian State University of Informatics and Radioelectronics, 6 Brovki Str., 220013 Minsk, Belarus
| | - Alexander Poznyak
- Research and Development Laboratory 4.10 “Nanotechnologies”, Belarusian State University of Informatics and Radioelectronics, 6 Brovki Str., 220013 Minsk, Belarus;
- Department of Electronic Technology and Engineering, Belarusian State University of Informatics and Radioelectronics, 6 Brovki Str., 220013 Minsk, Belarus
| | - Małgorzata Norek
- Institute of Materials Science and Engineering, Faculty of Advanced Technologies and Chemistry, Military University of Technology, 2 Kaliskiego Str., 00-908 Warsaw, Poland;
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Grigoryan LN, Bataeva YV, Andreeva ED, Zakar’yaeva DK, Turaeva ZO, Antonova SV. Study of the Component Structure of the Metabolites of Bacteria
Nocardiopsis umidischolae in the Search for
Eco-Friendly Plant Protection Agents. RUSS J GEN CHEM+ 2020. [DOI: 10.1134/s1070363220130010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Lim SY, Law CS, Liu L, Markovic M, Abell AD, Santos A. Integrating surface plasmon resonance and slow photon effects in nanoporous anodic alumina photonic crystals for photocatalysis. Catal Sci Technol 2019. [DOI: 10.1039/c9cy00627c] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study explores the potential of gold-coated titania-functionalized nanoporous anodic alumina distributed Bragg reflectors (Au-TiO2-NAA-DBRs) as platforms to enhance photocatalytic reactions by integrating “slow photons” and surface plasmon resonance (SPR).
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Affiliation(s)
- Siew Yee Lim
- School of Chemical Engineering
- The University of Adelaide
- 5005 Adelaide
- Australia
- Institute for Photonics and Advanced Sensing (IPAS)
| | - Cheryl Suwen Law
- School of Chemical Engineering
- The University of Adelaide
- 5005 Adelaide
- Australia
- Institute for Photonics and Advanced Sensing (IPAS)
| | - Lina Liu
- School of Chemical Engineering
- The University of Adelaide
- 5005 Adelaide
- Australia
- School of Chemistry and Chemical Engineering
| | - Marijana Markovic
- School of Chemical Engineering
- The University of Adelaide
- 5005 Adelaide
- Australia
- Center of Chemistry
| | - Andrew D. Abell
- Institute for Photonics and Advanced Sensing (IPAS)
- The University of Adelaide
- 5005 Adelaide
- Australia
- ARC Centre of Excellence for Nanoscale BioPhotonics (CNBP)
| | - Abel Santos
- School of Chemical Engineering
- The University of Adelaide
- 5005 Adelaide
- Australia
- Institute for Photonics and Advanced Sensing (IPAS)
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Lim SY, Law CS, Markovic M, Kirby JK, Abell AD, Santos A. Engineering the Slow Photon Effect in Photoactive Nanoporous Anodic Alumina Gradient-Index Filters for Photocatalysis. ACS APPLIED MATERIALS & INTERFACES 2018; 10:24124-24136. [PMID: 29939009 DOI: 10.1021/acsami.8b05946] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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.
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Affiliation(s)
- Siew Yee Lim
- School of Chemical Engineering , The University of Adelaide , Adelaide , South Australia 5005 , Australia
- Institute for Photonics and Advanced Sensing (IPAS) , The University of Adelaide , Adelaide , South Australia 5005 , Australia
- ARC Centre of Excellence for Nanoscale BioPhotonics (CNBP) , The University of Adelaide , Adelaide , South Australia 5005 , Australia
| | - Cheryl Suwen Law
- School of Chemical Engineering , The University of Adelaide , Adelaide , South Australia 5005 , Australia
- Institute for Photonics and Advanced Sensing (IPAS) , The University of Adelaide , Adelaide , South Australia 5005 , Australia
- ARC Centre of Excellence for Nanoscale BioPhotonics (CNBP) , The University of Adelaide , Adelaide , South Australia 5005 , Australia
| | - Marijana Markovic
- School of Agriculture Food and Wine , The University of Adelaide , Adelaide , South Australia 5064 , Australia
- CSIRO Land and Water , Adelaide , South Australia 5064 , Australia
| | - Jason K Kirby
- CSIRO Land and Water , Adelaide , South Australia 5064 , Australia
| | - Andrew D Abell
- Institute for Photonics and Advanced Sensing (IPAS) , The University of Adelaide , Adelaide , South Australia 5005 , Australia
- ARC Centre of Excellence for Nanoscale BioPhotonics (CNBP) , The University of Adelaide , Adelaide , South Australia 5005 , Australia
- Department of Chemistry , The University of Adelaide , Adelaide , South Australia 5005 , Australia
| | - Abel Santos
- School of Chemical Engineering , The University of Adelaide , Adelaide , South Australia 5005 , Australia
- Institute for Photonics and Advanced Sensing (IPAS) , The University of Adelaide , Adelaide , South Australia 5005 , Australia
- ARC Centre of Excellence for Nanoscale BioPhotonics (CNBP) , The University of Adelaide , Adelaide , South Australia 5005 , Australia
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