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

Santosh Kumar, Mark A. Isaacs, Rima Trofimovaite, Christopher M.A. Parlett, Richard E. Douthwaite, Ben Coulson, Martin C.R. Cockett, Karen Wilson, Adam F. Lee*

*Corresponding author for this work

Research output: Contribution to journalArticle

Abstract

Artificial photosynthesis driven by inorganic photocatalysts offers a promising route to renewable solar fuels, however efficient CO2 photoreduction remains a challenge. A family of hierarchical nanocomposites, comprising P25 nanoparticles encapsulated within microporous CoAl-layered double hydroxides (CoAl-LDHs) were prepared via a one-pot hydrothermal synthesis. Heterojunction formation between the visible light absorbing CoAl-LDH and UV light absorbing P25 semiconductors extends utilisation of the solar spectrum, while the solid basicity of the CoAl-LDH increases CO2 availability at photocatalytic surfaces. Matching of the semiconductor band structures and strong donor–acceptor coupling improves photoinduced charge carrier separation and transfer via the heterojunction. Hierarchical P25@CoAl-LDH nanocomposites exhibit good activity and selectivity (>90%) for aqueous CO2 photoreduction to CO, without a sacrificial hole acceptor. This represents a facile and cost-effective strategy for the design and development of LDH-based nanomaterials for efficient photocatalysis for renewable solar fuel production from particularly CO2 and aqueous water.
Original languageEnglish
Pages (from-to)394-404
Number of pages11
JournalApplied Catalysis B: Environmental
Volume209
Early online date2 Mar 2017
DOIs
Publication statusPublished - 15 Jul 2017

Fingerprint

Coal
hydroxide
Heterojunctions
Nanocomposites
coal
Hydroxides
Semiconductor materials
Photosynthesis
Photocatalysis
Hydrothermal synthesis
Carbon Monoxide
Alkalinity
Photocatalysts
Charge carriers
Nanostructured materials
Ultraviolet radiation
Band structure
photosynthesis
Availability
Nanoparticles

Bibliographical note

© 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license(http://creativecommons.org/licenses/by/4.0/).

Funding: EPSRC (EP/K021796/1 and EP/K029525/2).

Keywords

  • photocatalysis
  • CO2
  • titania
  • layered double hydroxide
  • nanocomposite

Cite this

Kumar, S., Isaacs, M. A., Trofimovaite, R., Parlett, C. M. A., Douthwaite, R. E., Coulson, B., ... Lee, A. F. (2017). P25@CoAl layered double hydroxide heterojunction nanocomposites for CO2 photocatalytic reduction. Applied Catalysis B: Environmental, 209, 394-404. https://doi.org/10.1016/j.apcatb.2017.03.006
Kumar, Santosh ; Isaacs, Mark A. ; Trofimovaite, Rima ; Parlett, Christopher M.A. ; Douthwaite, Richard E. ; Coulson, Ben ; Cockett, Martin C.R. ; Wilson, Karen ; Lee, Adam F. / P25@CoAl layered double hydroxide heterojunction nanocomposites for CO2 photocatalytic reduction. In: Applied Catalysis B: Environmental. 2017 ; Vol. 209. pp. 394-404.
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Kumar, S, Isaacs, MA, Trofimovaite, R, Parlett, CMA, Douthwaite, RE, Coulson, B, Cockett, MCR, Wilson, K & Lee, AF 2017, 'P25@CoAl layered double hydroxide heterojunction nanocomposites for CO2 photocatalytic reduction', Applied Catalysis B: Environmental, vol. 209, pp. 394-404. https://doi.org/10.1016/j.apcatb.2017.03.006

P25@CoAl layered double hydroxide heterojunction nanocomposites for CO2 photocatalytic reduction. / Kumar, Santosh; Isaacs, Mark A.; Trofimovaite, Rima; Parlett, Christopher M.A.; Douthwaite, Richard E.; Coulson, Ben; Cockett, Martin C.R.; Wilson, Karen; Lee, Adam F.

In: Applied Catalysis B: Environmental, Vol. 209, 15.07.2017, p. 394-404.

Research output: Contribution to journalArticle

TY - JOUR

T1 - P25@CoAl layered double hydroxide heterojunction nanocomposites for CO2 photocatalytic reduction

AU - Kumar, Santosh

AU - Isaacs, Mark A.

AU - Trofimovaite, Rima

AU - Parlett, Christopher M.A.

AU - Douthwaite, Richard E.

AU - Coulson, Ben

AU - Cockett, Martin C.R.

AU - Wilson, Karen

AU - Lee, Adam F.

N1 - © 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license(http://creativecommons.org/licenses/by/4.0/). Funding: EPSRC (EP/K021796/1 and EP/K029525/2).

PY - 2017/7/15

Y1 - 2017/7/15

N2 - Artificial photosynthesis driven by inorganic photocatalysts offers a promising route to renewable solar fuels, however efficient CO2 photoreduction remains a challenge. A family of hierarchical nanocomposites, comprising P25 nanoparticles encapsulated within microporous CoAl-layered double hydroxides (CoAl-LDHs) were prepared via a one-pot hydrothermal synthesis. Heterojunction formation between the visible light absorbing CoAl-LDH and UV light absorbing P25 semiconductors extends utilisation of the solar spectrum, while the solid basicity of the CoAl-LDH increases CO2 availability at photocatalytic surfaces. Matching of the semiconductor band structures and strong donor–acceptor coupling improves photoinduced charge carrier separation and transfer via the heterojunction. Hierarchical P25@CoAl-LDH nanocomposites exhibit good activity and selectivity (>90%) for aqueous CO2 photoreduction to CO, without a sacrificial hole acceptor. This represents a facile and cost-effective strategy for the design and development of LDH-based nanomaterials for efficient photocatalysis for renewable solar fuel production from particularly CO2 and aqueous water.

AB - Artificial photosynthesis driven by inorganic photocatalysts offers a promising route to renewable solar fuels, however efficient CO2 photoreduction remains a challenge. A family of hierarchical nanocomposites, comprising P25 nanoparticles encapsulated within microporous CoAl-layered double hydroxides (CoAl-LDHs) were prepared via a one-pot hydrothermal synthesis. Heterojunction formation between the visible light absorbing CoAl-LDH and UV light absorbing P25 semiconductors extends utilisation of the solar spectrum, while the solid basicity of the CoAl-LDH increases CO2 availability at photocatalytic surfaces. Matching of the semiconductor band structures and strong donor–acceptor coupling improves photoinduced charge carrier separation and transfer via the heterojunction. Hierarchical P25@CoAl-LDH nanocomposites exhibit good activity and selectivity (>90%) for aqueous CO2 photoreduction to CO, without a sacrificial hole acceptor. This represents a facile and cost-effective strategy for the design and development of LDH-based nanomaterials for efficient photocatalysis for renewable solar fuel production from particularly CO2 and aqueous water.

KW - photocatalysis

KW - CO2

KW - titania

KW - layered double hydroxide

KW - nanocomposite

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DO - 10.1016/j.apcatb.2017.03.006

M3 - Article

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JO - Applied Catalysis B

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SN - 0926-3373

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