Trofimovaite, Rima, Parlett, Christopher M.A., Kumar, Santosh et al. (8 more authors) (2018) Single atom Cu(I) promoted mesoporous titanias for photocatalytic Methyl Orange depollution and H2 production. APPLIED CATALYSIS B-ENVIRONMENTAL. pp. 501-511. ISSN 0926-3373
Abstract
Tailoring the physicochemical properties and hence reactivity of semiconductor photocatalysts in a predictable fashion, remains a challenge to their industrial application. Here we demonstrate the striking promotional effect of incorporating single Cu(I) atoms, on aqueous phase photocatalytic dye degradation and H2 production over surfactant-templated mesoporous TiO2. X-ray absorption spectroscopy reveals that ultra-low concentrations of copper (0.02–0.1 wt%) introduced into the mesoporous TiO2 surface create isolated Cu (I) species which suppress charge recombination, and confer a six-fold photocatalytic promotion of Methyl Orange degradation and four-fold enhancement of H2 evolution. The impact of mesopore structure and photophysical properties on photocatalytic activity is also quantified for the first time: calcination increases mesopore size and nanocrystalline order, and induces an anatase to rutile phase transition that is accompanied by a decrease in the optical band gap, increased charge carrier lifetime, and a concomitant significant activity enhancement.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © Elsevier, 2018. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. |
Keywords: | Copper,Mesoporous,Photocatalysis,Titania,XAS |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) The University of York |
Depositing User: | Pure (York) |
Date Deposited: | 18 Apr 2018 09:40 |
Last Modified: | 07 Feb 2025 00:19 |
Published Version: | https://doi.org/10.1016/j.apcatb.2018.03.078 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1016/j.apcatb.2018.03.078 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:129806 |
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Description: Cu meso-TiO2 Applied Catalysis B author accepted manuscript
Licence: CC-BY-NC-ND 2.5