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

Santosh Kumar, Lee J. Durndell, Jinesh C. Manayil, Mark A. Isaacs, Christopher M. A. Parlett, Sekar Karthikeyan , Richard E. Douthwaite, Ben Coulson, Karen Wilson, Adam F. Lee

Research output: Contribution to journalArticle

5 Citations (Scopus)

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 languageEnglish
Article number1700317
JournalParticle & Particle Systems Characterization
Volume35
Issue number1
DOIs
Publication statusPublished - 1 Jan 2018

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Coal
Carbon Monoxide
coal
Nanotubes
Nanosheets
hydroxides
Heterojunctions
heterojunctions
nanotubes
Nanocomposites
nanocomposites
fuel production
Nanoparticles
catalysts
nanoparticles
Catalysts
Beam plasma interactions
Photocatalysts
high aspect ratio
productivity

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Kumar, S., Durndell, L. J., Manayil, J. C., Isaacs, M. A., Parlett, C. M. A., Karthikeyan , S., ... Lee, A. F. (2018). Delaminated CoAl-Layered Double Hydroxide@TiO2 Heterojunction Nanocomposites for Photocatalytic Reduction of CO2. Particle & Particle Systems Characterization, 35(1), [1700317]. https://doi.org/10.1002/ppsc.201700317

Delaminated CoAl-Layered Double Hydroxide@TiO2 Heterojunction Nanocomposites for Photocatalytic Reduction of CO2. / Kumar, Santosh; Durndell, Lee J.; Manayil, Jinesh C. ; Isaacs, Mark A.; Parlett, Christopher M. A.; Karthikeyan , Sekar; Douthwaite, Richard E.; Coulson, Ben; Wilson, Karen; Lee, Adam F.

In: Particle & Particle Systems Characterization, Vol. 35, No. 1, 1700317, 01.01.2018.

Research output: Contribution to journalArticle

Kumar, S, Durndell, LJ, Manayil, JC, Isaacs, MA, Parlett, CMA, Karthikeyan , S, Douthwaite, RE, Coulson, B, Wilson, K & Lee, AF 2018, 'Delaminated CoAl-Layered Double Hydroxide@TiO2 Heterojunction Nanocomposites for Photocatalytic Reduction of CO2', Particle & Particle Systems Characterization, vol. 35, no. 1, 1700317. https://doi.org/10.1002/ppsc.201700317
Kumar, Santosh ; Durndell, Lee J. ; Manayil, Jinesh C. ; Isaacs, Mark A. ; Parlett, Christopher M. A. ; Karthikeyan , Sekar ; Douthwaite, Richard E. ; Coulson, Ben ; Wilson, Karen ; Lee, Adam F. / Delaminated CoAl-Layered Double Hydroxide@TiO2 Heterojunction Nanocomposites for Photocatalytic Reduction of CO2. In: Particle & Particle Systems Characterization. 2018 ; Vol. 35, No. 1.
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