TY - JOUR
T1 - Delaminated CoAl-Layered Double Hydroxide@TiO2 Heterojunction Nanocomposites for CO2 Photocatalytic Reduction
AU - Kumar, Santosh
AU - Durndell, Lee
AU - Manayil, Jinesh
AU - Isaacs, Mark A.
AU - Parlett, Christopher
AU - Karthikeyan, Sekar
AU - Douthwaite, Richard E.
AU - Coulson, Ben
AU - Wilson, Karen
AU - Lee, Adam
N1 - 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).
PY - 2018/1/23
Y1 - 2018/1/23
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
AB - 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
KW - CO2
KW - layered double hydroxides (LDHs)
KW - photocatalysis
KW - titania
KW - nanocomposites
UR - http://doi.org/10.17036/researchdata.aston.ac.uk.00000300
UR - https://onlinelibrary.wiley.com/doi/abs/10.1002/ppsc.201700317
U2 - 10.1002/ppsc.201700317
DO - 10.1002/ppsc.201700317
M3 - Article
AN - SCOPUS:85034742134
VL - 35
JO - Particle & Particle Systems Characterization
JF - Particle & Particle Systems Characterization
IS - 1
M1 - 1700317
ER -