journal article·2019-02-25

Rational Management of Photons for Enhanced Photocatalysis in Structurally-Colored Nanoporous Anodic Alumina Photonic Crystals

Siew Yee Lim, Cheryl Suwen Law, Marijana Markovic, Lluís F. Marsal, Nicolas H. Voelcker, Andrew D. Abell, Abel Santos

ACS Applied Energy Materials· Volume 2· Issue 2
Publisher page

Abstract

A comprehensive study on the engineering of titanium dioxide-functionalized nanoporous anodic alumina distributed Bragg reflectors (TiO2–NAA-DBRs) for photocatalysis enhanced by the “slow photon” effect is presented. The photocatalytic performance of these composite photonic crystals (PCs) is assessed by monitoring photodegradation of a variety of organic molecules with absorbance bands across the spectral regions. This study demonstrates that photocatalytic performance of TiO2–NAA-DBRs is enhanced by the “slow photon” effect when the edges of the PC’s photonic stopband (PSB) fall within the absorbance band of the organic molecules. The photocatalytic performance is significantly enhanced when the PSB’s red edge is in close proximity to the absorbance band of the organic molecules. Overall photocatalytic degradation is also dependent on the total pore length of the PC structure, charge of the organic molecules, percentage of vis–near-IR irradiation, and matrix complexity (i.e., interfering ions and molecules) when the PC’s PSB is partially or entirely misaligned with respect to the absorbance band of the organic molecules. Finally, the real-life application of TiO2–NAA-DBRs to degrade pollutants such as pesticides in environmental matrices is demonstrated. This study provides new insights into the development of rationally engineered, high-performing, safe, and reusable photocatalyst systems.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Anodic Oxide Films and Nanostructures · Photonic Crystals and Applications · Optical Coatings and Gratings

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

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 5005, South Australia, Australia

ARC Centre of Excellence for Nanoscale BioPhotonics (CNBP), The University of Adelaide, Adelaide 5005, South Australia, Australia

School of Agriculture Food and Wine, The University of Adelaide, Adelaide 5064, South Australia, Australia

Center of Chemistry, Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Belgrade 11000, Serbia

Department of Electronic, Electric, and Automatics Engineering, Universitat Rovira i Virgili, Tarragona, Tarragona 43007, Spain

Melbourne Centre for Nanofabrication, Victorian Node of the Australian National Fabrication Facility, Monash University, Melbourne, Victoria 3168, Australia

Monash Institute of Pharmaceutical Sciences, Monash University, Melbourne, Victoria 3052, Australia

Commonwealth Scientific and Industrial Research Organisation (CSIRO), Melbourne, Victoria 3168, Australia

INM-Leibniz Institute for New Materials, Campus D2 2, Saarbrücken 66123, Germany

Department of Chemistry, The University of Adelaide, Adelaide 5005, South Australia, Australia

Funding

European Regional Development Fund · Ministerio de Econom?a y Competitividad · Australian Research Council · Generalitat de Catalunya · Instituci? Catalana de Recerca i Estudis Avan?ats · School of Chemical Engineering, University of Adelaide · Institute for Photonics and Advanced Sensing, University of Adelaide

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