Decoration of g-C3N4 nanosheets by mesoporous CoFe2O4 nanoparticles for promoting visible-light photocatalytic Hg(II) reduction

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

Authors

  • Mohammad W. Kadi
  • Reda M. Mohamed
  • Adel A. Ismail
  • D.W. Bahnemann

Research Organisations

External Research Organisations

  • King Abdulaziz University
  • Central Metallurgical Research and Development Institute, Cairo
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Details

Original languageEnglish
Article number125206
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume603
Early online date27 Jun 2020
Publication statusPublished - 20 Oct 2020

Abstract

In this contribution, synthesis of mesoporous CoFe 2O 4/g-C 3N 4 heterostructures employing soft and hard templates approaches was explored to produce large surface area (151 m 2 g −1) and tight bandgap (2.05 eV) photocatalysts for Hg(II) photoreduction under visible light illumination. TEM image exhibited that CoFe 2O 4 NPs are well distributed over g-C 3N 4 nanosheet with a spherical like structure ∼ 5−10 nm. The magnetization values for CoFe 2O 4 NPs and 4%CoFe 2O 4/g-C 3N 4 heterostructure were calculated ∼ 6.21 and 11.07 emu g –1, which are very high values compared to the published papers. Mesoporous CoFe 2O 4/g-C 3N 4 exhibited a greater photocatalytic efficiency than pure either CoFe 2O 4 NPs or g-C 3N 4. Hg(II) photoreduction efficiency boosted from 16.2 % to 100 % as the CoFe 2O 4 NPs contents increased from 0 to 4% in the mesoporous CoFe 2O 4/g-C 3N 4 heterostructures within 60 min. The Hg(II) photoreduction rate goes more quickly over mesoporous 4%CoFe 2O 4/g-C 3N 4 (539.91 μmolg −1 h −1) as compared to pure either g-C 3N 4 (79.86 μmolg −1 h −1) and CoFe 2O 4 NPs (117.25 μmolg −1 h −1). The key factor for promoting Hg(II) photoreduction is the highly dispersed CoFe 2O 4 NPs onto the surface of g-C 3N 4 and their large surface area, narrow bandgap, small particles size, harvest light and high diffusion of Hg(II) into the pores. Mesoporous CoFe 2O 4/g-C 3N 4 are magnetically removable easily possessing a high recyclability and durability in the Hg(II) photoreduction in aqueous solutions.

Keywords

    CoFe O /g-C N, Heterostructure, Hg(II) photoreduction, Mesoporous, Visible light

ASJC Scopus subject areas

Cite this

Decoration of g-C3N4 nanosheets by mesoporous CoFe2O4 nanoparticles for promoting visible-light photocatalytic Hg(II) reduction. / Kadi, Mohammad W.; Mohamed, Reda M.; Ismail, Adel A. et al.
In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 603, 125206, 20.10.2020.

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

Kadi MW, Mohamed RM, Ismail AA, Bahnemann DW. Decoration of g-C3N4 nanosheets by mesoporous CoFe2O4 nanoparticles for promoting visible-light photocatalytic Hg(II) reduction. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2020 Oct 20;603:125206. Epub 2020 Jun 27. doi: 10.1016/j.colsurfa.2020.125206
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title = "Decoration of g-C3N4 nanosheets by mesoporous CoFe2O4 nanoparticles for promoting visible-light photocatalytic Hg(II) reduction",
abstract = "In this contribution, synthesis of mesoporous CoFe 2O 4/g-C 3N 4 heterostructures employing soft and hard templates approaches was explored to produce large surface area (151 m 2 g −1) and tight bandgap (2.05 eV) photocatalysts for Hg(II) photoreduction under visible light illumination. TEM image exhibited that CoFe 2O 4 NPs are well distributed over g-C 3N 4 nanosheet with a spherical like structure ∼ 5−10 nm. The magnetization values for CoFe 2O 4 NPs and 4%CoFe 2O 4/g-C 3N 4 heterostructure were calculated ∼ 6.21 and 11.07 emu g –1, which are very high values compared to the published papers. Mesoporous CoFe 2O 4/g-C 3N 4 exhibited a greater photocatalytic efficiency than pure either CoFe 2O 4 NPs or g-C 3N 4. Hg(II) photoreduction efficiency boosted from 16.2 % to 100 % as the CoFe 2O 4 NPs contents increased from 0 to 4% in the mesoporous CoFe 2O 4/g-C 3N 4 heterostructures within 60 min. The Hg(II) photoreduction rate goes more quickly over mesoporous 4%CoFe 2O 4/g-C 3N 4 (539.91 μmolg −1 h −1) as compared to pure either g-C 3N 4 (79.86 μmolg −1 h −1) and CoFe 2O 4 NPs (117.25 μmolg −1 h −1). The key factor for promoting Hg(II) photoreduction is the highly dispersed CoFe 2O 4 NPs onto the surface of g-C 3N 4 and their large surface area, narrow bandgap, small particles size, harvest light and high diffusion of Hg(II) into the pores. Mesoporous CoFe 2O 4/g-C 3N 4 are magnetically removable easily possessing a high recyclability and durability in the Hg(II) photoreduction in aqueous solutions. ",
keywords = "CoFe O /g-C N, Heterostructure, Hg(II) photoreduction, Mesoporous, Visible light",
author = "Kadi, {Mohammad W.} and Mohamed, {Reda M.} and Ismail, {Adel A.} and D.W. Bahnemann",
note = "Funding Information: This project was funded by the Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah, under grant no. RG-35-130-38. The authors, therefore, acknowledge with thanks DSR for technical and financial support. ",
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Download

TY - JOUR

T1 - Decoration of g-C3N4 nanosheets by mesoporous CoFe2O4 nanoparticles for promoting visible-light photocatalytic Hg(II) reduction

AU - Kadi, Mohammad W.

AU - Mohamed, Reda M.

AU - Ismail, Adel A.

AU - Bahnemann, D.W.

N1 - Funding Information: This project was funded by the Deanship of Scientific Research (DSR) at King Abdulaziz University, Jeddah, under grant no. RG-35-130-38. The authors, therefore, acknowledge with thanks DSR for technical and financial support.

PY - 2020/10/20

Y1 - 2020/10/20

N2 - In this contribution, synthesis of mesoporous CoFe 2O 4/g-C 3N 4 heterostructures employing soft and hard templates approaches was explored to produce large surface area (151 m 2 g −1) and tight bandgap (2.05 eV) photocatalysts for Hg(II) photoreduction under visible light illumination. TEM image exhibited that CoFe 2O 4 NPs are well distributed over g-C 3N 4 nanosheet with a spherical like structure ∼ 5−10 nm. The magnetization values for CoFe 2O 4 NPs and 4%CoFe 2O 4/g-C 3N 4 heterostructure were calculated ∼ 6.21 and 11.07 emu g –1, which are very high values compared to the published papers. Mesoporous CoFe 2O 4/g-C 3N 4 exhibited a greater photocatalytic efficiency than pure either CoFe 2O 4 NPs or g-C 3N 4. Hg(II) photoreduction efficiency boosted from 16.2 % to 100 % as the CoFe 2O 4 NPs contents increased from 0 to 4% in the mesoporous CoFe 2O 4/g-C 3N 4 heterostructures within 60 min. The Hg(II) photoreduction rate goes more quickly over mesoporous 4%CoFe 2O 4/g-C 3N 4 (539.91 μmolg −1 h −1) as compared to pure either g-C 3N 4 (79.86 μmolg −1 h −1) and CoFe 2O 4 NPs (117.25 μmolg −1 h −1). The key factor for promoting Hg(II) photoreduction is the highly dispersed CoFe 2O 4 NPs onto the surface of g-C 3N 4 and their large surface area, narrow bandgap, small particles size, harvest light and high diffusion of Hg(II) into the pores. Mesoporous CoFe 2O 4/g-C 3N 4 are magnetically removable easily possessing a high recyclability and durability in the Hg(II) photoreduction in aqueous solutions.

AB - In this contribution, synthesis of mesoporous CoFe 2O 4/g-C 3N 4 heterostructures employing soft and hard templates approaches was explored to produce large surface area (151 m 2 g −1) and tight bandgap (2.05 eV) photocatalysts for Hg(II) photoreduction under visible light illumination. TEM image exhibited that CoFe 2O 4 NPs are well distributed over g-C 3N 4 nanosheet with a spherical like structure ∼ 5−10 nm. The magnetization values for CoFe 2O 4 NPs and 4%CoFe 2O 4/g-C 3N 4 heterostructure were calculated ∼ 6.21 and 11.07 emu g –1, which are very high values compared to the published papers. Mesoporous CoFe 2O 4/g-C 3N 4 exhibited a greater photocatalytic efficiency than pure either CoFe 2O 4 NPs or g-C 3N 4. Hg(II) photoreduction efficiency boosted from 16.2 % to 100 % as the CoFe 2O 4 NPs contents increased from 0 to 4% in the mesoporous CoFe 2O 4/g-C 3N 4 heterostructures within 60 min. The Hg(II) photoreduction rate goes more quickly over mesoporous 4%CoFe 2O 4/g-C 3N 4 (539.91 μmolg −1 h −1) as compared to pure either g-C 3N 4 (79.86 μmolg −1 h −1) and CoFe 2O 4 NPs (117.25 μmolg −1 h −1). The key factor for promoting Hg(II) photoreduction is the highly dispersed CoFe 2O 4 NPs onto the surface of g-C 3N 4 and their large surface area, narrow bandgap, small particles size, harvest light and high diffusion of Hg(II) into the pores. Mesoporous CoFe 2O 4/g-C 3N 4 are magnetically removable easily possessing a high recyclability and durability in the Hg(II) photoreduction in aqueous solutions.

KW - CoFe O /g-C N

KW - Heterostructure

KW - Hg(II) photoreduction

KW - Mesoporous

KW - Visible light

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U2 - 10.1016/j.colsurfa.2020.125206

DO - 10.1016/j.colsurfa.2020.125206

M3 - Article

VL - 603

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

SN - 0927-7757

M1 - 125206

ER -