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

doi:10.1016/j.apcatb.2017.03.006

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 journal › Article › peer-review

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 language	English
Pages (from-to)	394-404
Number of pages	11
Journal	Applied Catalysis B: Environmental
Volume	209
Early online date	2 Mar 2017
DOIs	https://doi.org/10.1016/j.apcatb.2017.03.006
Publication status	Published - 15 Jul 2017

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

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10.1016/j.apcatb.2017.03.006Licence: CC BY 3.0

P25(at)CoAl layered double hydroxide heterojunction
© 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/).
Final published version, 1.64 MBLicence: CC BY 3.0

Cite this

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title = "P25@CoAl layered double hydroxide heterojunction nanocomposites for CO2 photocatalytic reduction",

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.",

keywords = "photocatalysis, CO2, titania, layered double hydroxide, nanocomposite",

author = "Santosh Kumar and Isaacs, {Mark A.} and Rima Trofimovaite and Parlett, {Christopher M.A.} and Douthwaite, {Richard E.} and Ben Coulson and Cockett, {Martin C.R.} and Karen Wilson and Lee, {Adam F.}",

note = "{\textcopyright} 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).",

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doi = "10.1016/j.apcatb.2017.03.006",

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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.

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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JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

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

Abstract

Bibliographical note

Keywords

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

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