Pompon Dahlia‐like Cu2O/rGO Nanostructures for Visible Light Photocatalytic H2 Production and 4‐Chlorophenol Degradation

Sekar Karthikeyan; Kassam Ahmed; Amin Osatiashtiani; Adam F. Lee; Karen Wilson; Keiko Sasaki; Ben Coulson; Will Swansborough‐aston; Richard E. Douthwaite; Wei Li

doi:10.1002/cctc.201902048

Pompon Dahlia‐like Cu₂O/rGO Nanostructures for Visible Light Photocatalytic H₂ Production and 4‐Chlorophenol Degradation

Sekar Karthikeyan, Kassam Ahmed, Amin Osatiashtiani, Adam F. Lee, Karen Wilson, Keiko Sasaki, Ben Coulson, Will Swansborough‐aston, Richard E. Douthwaite, Wei Li

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

Abstract

Hierarchical Cu₂O nanospheres with a Pompon Dahlia‐like morphology were prepared by a one‐pot synthesis employing electrostatic self‐assembly. Nanocomposite analogues were also prepared in the presence of reduced graphene oxide (rGO). Photophysical properties of the hierarchical Cu₂O nanospheres and Cu₂O/rGO nanocomposite were determined, and their photocatalytic applications evaluated for photocatalytic 4‐chlorophenol (4‐CP) degradation and H₂ production. Introduction of trace (<1 wt %) rGO improves the apparent quantum efficiency (AQE) at 475 nm of hierarchical Cu₂O for H₂production from 2.23 % to 3.35 %, giving an increase of evolution rate from 234 μmol.g⁻¹.h⁻¹ to 352 μmol.g⁻¹.h⁻¹ respectively. The AQE for 4‐CP degradation also increases from 52 % to 59 %, with the removal efficiency reaching 95 % of 10 ppm 4‐CP within 1 h. Superior performance of the hierarchical Cu₂O/rGO nanocomposite is attributable to increased visible light absorption, reflected in a greater photocurrent density. Excellent catalyst photostability for >6 h continuous reaction is observed.

Original language	English
Pages (from-to)	1699-1709
Number of pages	11
Journal	ChemCatChem
Volume	12
Issue number	6
Early online date	17 Dec 2019
DOIs	https://doi.org/10.1002/cctc.201902048
Publication status	Published - 19 Mar 2020

Bibliographical note

This is the peer reviewed version of the following article: Karthikeyan, S., Ahmed, K., Osatiashtiani, A., Lee, A.F., Wilson, K., Sasaki, K., Coulson, B., Swansborough‐Aston, W., Douthwaite, R.E. and Li, W. (2020), Pompon Dahlia‐like Cu2O/rGO Nanostructures for Visible Light Photocatalytic H2 Production and 4‐Chlorophenol Degradation. ChemCatChem, which has been published in final form at https://doi.org/10.1002/cctc.201902048. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.

Funding: Royal Society and Science and Engineering Research Board. Grant Number: NF151399; Biotechnology and Biological Sciences Research Council. Grant Number: BB/P022685/1; Japan Society for the Promotion of Science. Grant Number: P18387; KAKENHI. Grant Number: JP18F18387

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10.1002/cctc.201902048

Pompon Dahlia like Cu2O
This is the peer reviewed version of the following article: Karthikeyan, S., Ahmed, K., Osatiashtiani, A., Lee, A.F., Wilson, K., Sasaki, K., Coulson, B., Swansborough‐Aston, W., Douthwaite, R.E. and Li, W. (2020), Pompon Dahlia‐like Cu2O/rGO Nanostructures for Visible Light Photocatalytic H2 Production and 4‐Chlorophenol Degradation. ChemCatChem, which has been published in final form at https://doi.org/10.1002/cctc.201902048. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Accepted author manuscript, 1.73 MB

Cite this

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title = "Pompon Dahlia‐like Cu2O/rGO Nanostructures for Visible Light Photocatalytic H2 Production and 4‐Chlorophenol Degradation",

abstract = "Hierarchical Cu2O nanospheres with a Pompon Dahlia‐like morphology were prepared by a one‐pot synthesis employing electrostatic self‐assembly. Nanocomposite analogues were also prepared in the presence of reduced graphene oxide (rGO). Photophysical properties of the hierarchical Cu2O nanospheres and Cu2O/rGO nanocomposite were determined, and their photocatalytic applications evaluated for photocatalytic 4‐chlorophenol (4‐CP) degradation and H2 production. Introduction of trace (<1 wt %) rGO improves the apparent quantum efficiency (AQE) at 475 nm of hierarchical Cu2O for H2 production from 2.23 % to 3.35 %, giving an increase of evolution rate from 234 μmol.g−1.h−1 to 352 μmol.g−1.h−1 respectively. The AQE for 4‐CP degradation also increases from 52 % to 59 %, with the removal efficiency reaching 95 % of 10 ppm 4‐CP within 1 h. Superior performance of the hierarchical Cu2O/rGO nanocomposite is attributable to increased visible light absorption, reflected in a greater photocurrent density. Excellent catalyst photostability for >6 h continuous reaction is observed.",

author = "Sekar Karthikeyan and Kassam Ahmed and Amin Osatiashtiani and Lee, {Adam F.} and Karen Wilson and Keiko Sasaki and Ben Coulson and Will Swansborough‐aston and Douthwaite, {Richard E.} and Wei Li",

note = "This is the peer reviewed version of the following article: Karthikeyan, S., Ahmed, K., Osatiashtiani, A., Lee, A.F., Wilson, K., Sasaki, K., Coulson, B., Swansborough‐Aston, W., Douthwaite, R.E. and Li, W. (2020), Pompon Dahlia‐like Cu2O/rGO Nanostructures for Visible Light Photocatalytic H2 Production and 4‐Chlorophenol Degradation. ChemCatChem, which has been published in final form at https://doi.org/10.1002/cctc.201902048. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving. Funding: Royal Society and Science and Engineering Research Board. Grant Number: NF151399; Biotechnology and Biological Sciences Research Council. Grant Number: BB/P022685/1; Japan Society for the Promotion of Science. Grant Number: P18387; KAKENHI. Grant Number: JP18F18387",

year = "2020",

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doi = "10.1002/cctc.201902048",

language = "English",

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T1 - Pompon Dahlia‐like Cu2O/rGO Nanostructures for Visible Light Photocatalytic H2 Production and 4‐Chlorophenol Degradation

AU - Karthikeyan, Sekar

AU - Ahmed, Kassam

AU - Osatiashtiani, Amin

AU - Lee, Adam F.

AU - Wilson, Karen

AU - Sasaki, Keiko

AU - Coulson, Ben

AU - Swansborough‐aston, Will

AU - Douthwaite, Richard E.

AU - Li, Wei

N1 - This is the peer reviewed version of the following article: Karthikeyan, S., Ahmed, K., Osatiashtiani, A., Lee, A.F., Wilson, K., Sasaki, K., Coulson, B., Swansborough‐Aston, W., Douthwaite, R.E. and Li, W. (2020), Pompon Dahlia‐like Cu2O/rGO Nanostructures for Visible Light Photocatalytic H2 Production and 4‐Chlorophenol Degradation. ChemCatChem, which has been published in final form at https://doi.org/10.1002/cctc.201902048. This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving. Funding: Royal Society and Science and Engineering Research Board. Grant Number: NF151399; Biotechnology and Biological Sciences Research Council. Grant Number: BB/P022685/1; Japan Society for the Promotion of Science. Grant Number: P18387; KAKENHI. Grant Number: JP18F18387

PY - 2020/3/19

Y1 - 2020/3/19

N2 - Hierarchical Cu2O nanospheres with a Pompon Dahlia‐like morphology were prepared by a one‐pot synthesis employing electrostatic self‐assembly. Nanocomposite analogues were also prepared in the presence of reduced graphene oxide (rGO). Photophysical properties of the hierarchical Cu2O nanospheres and Cu2O/rGO nanocomposite were determined, and their photocatalytic applications evaluated for photocatalytic 4‐chlorophenol (4‐CP) degradation and H2 production. Introduction of trace (<1 wt %) rGO improves the apparent quantum efficiency (AQE) at 475 nm of hierarchical Cu2O for H2 production from 2.23 % to 3.35 %, giving an increase of evolution rate from 234 μmol.g−1.h−1 to 352 μmol.g−1.h−1 respectively. The AQE for 4‐CP degradation also increases from 52 % to 59 %, with the removal efficiency reaching 95 % of 10 ppm 4‐CP within 1 h. Superior performance of the hierarchical Cu2O/rGO nanocomposite is attributable to increased visible light absorption, reflected in a greater photocurrent density. Excellent catalyst photostability for >6 h continuous reaction is observed.

AB - Hierarchical Cu2O nanospheres with a Pompon Dahlia‐like morphology were prepared by a one‐pot synthesis employing electrostatic self‐assembly. Nanocomposite analogues were also prepared in the presence of reduced graphene oxide (rGO). Photophysical properties of the hierarchical Cu2O nanospheres and Cu2O/rGO nanocomposite were determined, and their photocatalytic applications evaluated for photocatalytic 4‐chlorophenol (4‐CP) degradation and H2 production. Introduction of trace (<1 wt %) rGO improves the apparent quantum efficiency (AQE) at 475 nm of hierarchical Cu2O for H2 production from 2.23 % to 3.35 %, giving an increase of evolution rate from 234 μmol.g−1.h−1 to 352 μmol.g−1.h−1 respectively. The AQE for 4‐CP degradation also increases from 52 % to 59 %, with the removal efficiency reaching 95 % of 10 ppm 4‐CP within 1 h. Superior performance of the hierarchical Cu2O/rGO nanocomposite is attributable to increased visible light absorption, reflected in a greater photocurrent density. Excellent catalyst photostability for >6 h continuous reaction is observed.

UR - https://onlinelibrary.wiley.com/doi/abs/10.1002/cctc.201902048

U2 - 10.1002/cctc.201902048

DO - 10.1002/cctc.201902048

M3 - Article

SN - 1867-3880

VL - 12

SP - 1699

EP - 1709

JO - ChemCatChem

JF - ChemCatChem

IS - 6

ER -

Pompon Dahlia‐like Cu₂O/rGO Nanostructures for Visible Light Photocatalytic H₂ Production and 4‐Chlorophenol Degradation

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