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

Santosh Kumar; Lee Durndell; Jinesh Manayil; Mark A. Isaacs; Christopher Parlett; Sekar Karthikeyan; Richard E. Douthwaite; Ben Coulson; Karen Wilson; Adam Lee

doi:10.1002/ppsc.201700317

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

Santosh Kumar, Lee Durndell, Jinesh Manayil, Mark A. Isaacs, Christopher Parlett, Sekar Karthikeyan, Richard E. Douthwaite, Ben Coulson, Karen Wilson, Adam Lee^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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

Original language	English
Article number	1700317
Number of pages	11
Journal	Particle & Particle Systems Characterization
Volume	35
Issue number	1
Early online date	22 Nov 2017
DOIs	https://doi.org/10.1002/ppsc.201700317
Publication status	Published - 23 Jan 2018

Bibliographical note

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).

Keywords

CO2
layered double hydroxides (LDHs)
photocatalysis
titania
nanocomposites

Access to Document

10.1002/ppsc.201700317

Delaminated CoAl-Layered Double Hydroxide@TiO2 Heterojunction Nanocomposites for CO2 Photocatalytic Reduction
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.
Accepted author manuscript, 3.63 MB

Cite this

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title = "Delaminated CoAl-Layered Double Hydroxide@TiO2 Heterojunction Nanocomposites for CO2 Photocatalytic Reduction",

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 atenfold 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",

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note = "Copyright {\textcopyright} 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).",

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AU - Parlett, Christopher

AU - Karthikeyan, Sekar

AU - Douthwaite, Richard E.

AU - Coulson, Ben

AU - Wilson, Karen

AU - Lee, Adam

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N2 - 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 atenfold 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

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KW - titania

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ER -

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

Abstract

Bibliographical note

Keywords

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P25@CoAl layered double hydroxide heterojunction nanocomposites for CO₂ photocatalytic reduction