Delaminated CoAl-Layered Double Hydroxide@TiO2 Heterojunction Nanocomposites for CO2 Photocatalytic Reduction

Kumar, Santosh, Durndell, Lee, Manayil, Jinesh, Isaacs, Mark A., Parlett, Christopher, Karthikeyan, Sekar, Douthwaite, Richard E., Coulson, Ben, Wilson, Karen and Lee, Adam (2017). Delaminated CoAl-Layered Double Hydroxide@TiO2 Heterojunction Nanocomposites for CO2 Photocatalytic Reduction. Particle & Particle Systems Characterization ,

Abstract

Photocatalytic reduction offers an attractive route for CO2 utilization as a chemical feedstock for solar fuels production but remains challenging due to the poor efficiency, instability, and/or toxicity of current catalyst systems. Delaminated CoAl-layered double hydroxide nanosheets (LDH-DS) combined with TiO2 nanotubes (NTs) or nanoparticles (NPs) are promising nanocomposite photocatalysts for CO2 reduction. Heterojunction formation between visible light absorbing delaminated CoAl nanosheets and UV light absorbing TiO2 nanotubes greatly enhances interfacial contact between both high aspect ratio components relative to their bulk counterparts. The resulting synergic interaction confers a significant improvement in photoinduced charge carrier separation, and concomitant aqueous phase CO2 photocatalytic reduction, in the absence of a sacrificial hole acceptor. CO productivity for a 3 wt% LDH-DS@TiO2-NT nanocomposite of 4.57 μmol gcat -1 h-1 exhibits a tenfold and fivefold increase over that obtained for individual TiO2 NT and delaminated CoAl-LDH components respectively and is double that obtained for 3 wt% bulk-LDH@TiO2-NT and 3 wt% LDH-DS@TiO2-NP catalysts. Synthesis of delaminated LDH and metal oxide nanocomposites represents a cost-effective strategy for aqueous phase CO2 reduction

Publication DOI: https://doi.org/10.1002/ppsc.201700317
Dataset DOI: https://doi.org/10.17036/researchdata.aston.ac.uk.00000300
Divisions: Engineering & Applied Sciences
Engineering & Applied Sciences > Chemical engineering & applied chemistry
Engineering & Applied Sciences > European Bioenergy Research Institute (EBRI)
Additional Information: Copyright © 2017 by John Wiley & Sons. This is the peer reviewed version of the following article: Delaminated CoAl-Layered Double Hydroxide@TiO2 Heterojunction Nanocomposites for CO2 Photocatalytic Reduction Kumar, S., Durndell, L., Manayil, J., Isaacs, M. A., Parlett, C., Karthikeyan, S., Douthwaite, R. E., Coulson, B., Wilson, K. & Lee, A. 22 Nov 2017 In : Particle & Particle Systems Characterization. 11 p., 1700317, which has been published in final form at http://doi.org/10.1002/ppsc.201700317. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. Funding: EPSRC (EP/K021796/1 and EP/K029525/2).
Uncontrolled Keywords: CO2,layered double hydroxides (LDHs),photocatalysis, titania,nanocomposites,Chemistry(all),Materials Science(all),Condensed Matter Physics
Full Text Link: http://onlineli ... C4E2FCD4.f03t03
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Published Date: 2017-11-22
Authors: Kumar, Santosh ( 0000-0002-1352-9945)
Durndell, Lee
Manayil, Jinesh
Isaacs, Mark A.
Parlett, Christopher ( 0000-0002-3651-7314)
Karthikeyan, Sekar
Douthwaite, Richard E.
Coulson, Ben
Wilson, Karen ( 0000-0003-4873-708X)
Lee, Adam ( 0000-0002-2153-1391)

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