Enhancement of visible light photocatalytic hydrogen evolution by bio-mimetic C-doped graphitic carbon nitride

Mohamad Azuwa Mohamed, M. F. M. Zain, Lorna Effery Minggu, Mohammad Kassim, Juhana Jaafar, Nor Aishah Saidina Amin, Zul Adlan Mohd Hir, Mohamad Saufi Rosmi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Bio-mimetic C-doped graphitic carbon nitride (g-C 3 N 4 )with mesoporous microtubular structure has been prepared by a simple chemical wet bio-template impregnation approach (direct impregnation and hydrothermal impregnation)using urea as a precursor and kapok fibre as bio-template and in-situ carbon dopant. Our finding indicated that the hydrothermal impregnation had induced more in-situ C-doping in g-C 3 N 4 as compared to the direct impregnation approach. The introduction of in-situ C doping in the g-C 3 N 4 and the mesoporous microtubular structure remarkably enhanced light-harvesting capability up to near infrared regions. The photocurrent measurement and electrochemical impedance spectroscopy (EIS)analysis suggested that the bio-template C-doped g-C 3 N 4 exhibits a superior photoinduced electron-hole pairs separation efficiency due to C doping and mesoporous microtubular structure significantly promotes excellent conductivity and electron redistribution in the sample. C-doped graphitic carbon nitride sample prepared by the hydrothermal (HB/g-C 3 N 4 )approach exhibits excellent photocatalytic hydrogen production with an H 2 production rate of 216.8 μmol h −1 g −1 which was a 1.3 and 2.9 improvement over C-doped graphitic carbon nitride prepared by direct impregnation (DB/g-C 3 N 4 )and pristine g-C 3 N 4, respectively. This study provides new insights into the development of low-cost and sustainable photocatalysts for photocatalytic hydrogen production.

Original languageEnglish
Pages (from-to)13098-13105
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume44
Issue number26
DOIs
Publication statusPublished - 21 May 2019

Fingerprint

carbon nitrides
Carbon nitride
Impregnation
templates
hydrogen production
Hydrogen
augmentation
hydrogen
Doping (additives)
Hydrogen production
ureas
photocurrents
impedance
conductivity
fibers
Electrons
carbon
Photocatalysts
Photocurrents
Electrochemical impedance spectroscopy

Keywords

  • Bio-template
  • Carbon doping
  • g-C N
  • Light-harvesting
  • Photocatalytic hydrogen production

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Enhancement of visible light photocatalytic hydrogen evolution by bio-mimetic C-doped graphitic carbon nitride. / Mohamed, Mohamad Azuwa; M. Zain, M. F.; Effery Minggu, Lorna; Kassim, Mohammad; Jaafar, Juhana; Saidina Amin, Nor Aishah; Mohd Hir, Zul Adlan; Rosmi, Mohamad Saufi.

In: International Journal of Hydrogen Energy, Vol. 44, No. 26, 21.05.2019, p. 13098-13105.

Research output: Contribution to journalArticle

Mohamed, Mohamad Azuwa ; M. Zain, M. F. ; Effery Minggu, Lorna ; Kassim, Mohammad ; Jaafar, Juhana ; Saidina Amin, Nor Aishah ; Mohd Hir, Zul Adlan ; Rosmi, Mohamad Saufi. / Enhancement of visible light photocatalytic hydrogen evolution by bio-mimetic C-doped graphitic carbon nitride. In: International Journal of Hydrogen Energy. 2019 ; Vol. 44, No. 26. pp. 13098-13105.
@article{e8bb70db4ec440b89059e08783e9d112,
title = "Enhancement of visible light photocatalytic hydrogen evolution by bio-mimetic C-doped graphitic carbon nitride",
abstract = "Bio-mimetic C-doped graphitic carbon nitride (g-C 3 N 4 )with mesoporous microtubular structure has been prepared by a simple chemical wet bio-template impregnation approach (direct impregnation and hydrothermal impregnation)using urea as a precursor and kapok fibre as bio-template and in-situ carbon dopant. Our finding indicated that the hydrothermal impregnation had induced more in-situ C-doping in g-C 3 N 4 as compared to the direct impregnation approach. The introduction of in-situ C doping in the g-C 3 N 4 and the mesoporous microtubular structure remarkably enhanced light-harvesting capability up to near infrared regions. The photocurrent measurement and electrochemical impedance spectroscopy (EIS)analysis suggested that the bio-template C-doped g-C 3 N 4 exhibits a superior photoinduced electron-hole pairs separation efficiency due to C doping and mesoporous microtubular structure significantly promotes excellent conductivity and electron redistribution in the sample. C-doped graphitic carbon nitride sample prepared by the hydrothermal (HB/g-C 3 N 4 )approach exhibits excellent photocatalytic hydrogen production with an H 2 production rate of 216.8 μmol h −1 g −1 which was a 1.3 and 2.9 improvement over C-doped graphitic carbon nitride prepared by direct impregnation (DB/g-C 3 N 4 )and pristine g-C 3 N 4, respectively. This study provides new insights into the development of low-cost and sustainable photocatalysts for photocatalytic hydrogen production.",
keywords = "Bio-template, Carbon doping, g-C N, Light-harvesting, Photocatalytic hydrogen production",
author = "Mohamed, {Mohamad Azuwa} and {M. Zain}, {M. F.} and {Effery Minggu}, Lorna and Mohammad Kassim and Juhana Jaafar and {Saidina Amin}, {Nor Aishah} and {Mohd Hir}, {Zul Adlan} and Rosmi, {Mohamad Saufi}",
year = "2019",
month = "5",
day = "21",
doi = "10.1016/j.ijhydene.2019.02.243",
language = "English",
volume = "44",
pages = "13098--13105",
journal = "International Journal of Hydrogen Energy",
issn = "0360-3199",
publisher = "Elsevier Limited",
number = "26",

}

TY - JOUR

T1 - Enhancement of visible light photocatalytic hydrogen evolution by bio-mimetic C-doped graphitic carbon nitride

AU - Mohamed, Mohamad Azuwa

AU - M. Zain, M. F.

AU - Effery Minggu, Lorna

AU - Kassim, Mohammad

AU - Jaafar, Juhana

AU - Saidina Amin, Nor Aishah

AU - Mohd Hir, Zul Adlan

AU - Rosmi, Mohamad Saufi

PY - 2019/5/21

Y1 - 2019/5/21

N2 - Bio-mimetic C-doped graphitic carbon nitride (g-C 3 N 4 )with mesoporous microtubular structure has been prepared by a simple chemical wet bio-template impregnation approach (direct impregnation and hydrothermal impregnation)using urea as a precursor and kapok fibre as bio-template and in-situ carbon dopant. Our finding indicated that the hydrothermal impregnation had induced more in-situ C-doping in g-C 3 N 4 as compared to the direct impregnation approach. The introduction of in-situ C doping in the g-C 3 N 4 and the mesoporous microtubular structure remarkably enhanced light-harvesting capability up to near infrared regions. The photocurrent measurement and electrochemical impedance spectroscopy (EIS)analysis suggested that the bio-template C-doped g-C 3 N 4 exhibits a superior photoinduced electron-hole pairs separation efficiency due to C doping and mesoporous microtubular structure significantly promotes excellent conductivity and electron redistribution in the sample. C-doped graphitic carbon nitride sample prepared by the hydrothermal (HB/g-C 3 N 4 )approach exhibits excellent photocatalytic hydrogen production with an H 2 production rate of 216.8 μmol h −1 g −1 which was a 1.3 and 2.9 improvement over C-doped graphitic carbon nitride prepared by direct impregnation (DB/g-C 3 N 4 )and pristine g-C 3 N 4, respectively. This study provides new insights into the development of low-cost and sustainable photocatalysts for photocatalytic hydrogen production.

AB - Bio-mimetic C-doped graphitic carbon nitride (g-C 3 N 4 )with mesoporous microtubular structure has been prepared by a simple chemical wet bio-template impregnation approach (direct impregnation and hydrothermal impregnation)using urea as a precursor and kapok fibre as bio-template and in-situ carbon dopant. Our finding indicated that the hydrothermal impregnation had induced more in-situ C-doping in g-C 3 N 4 as compared to the direct impregnation approach. The introduction of in-situ C doping in the g-C 3 N 4 and the mesoporous microtubular structure remarkably enhanced light-harvesting capability up to near infrared regions. The photocurrent measurement and electrochemical impedance spectroscopy (EIS)analysis suggested that the bio-template C-doped g-C 3 N 4 exhibits a superior photoinduced electron-hole pairs separation efficiency due to C doping and mesoporous microtubular structure significantly promotes excellent conductivity and electron redistribution in the sample. C-doped graphitic carbon nitride sample prepared by the hydrothermal (HB/g-C 3 N 4 )approach exhibits excellent photocatalytic hydrogen production with an H 2 production rate of 216.8 μmol h −1 g −1 which was a 1.3 and 2.9 improvement over C-doped graphitic carbon nitride prepared by direct impregnation (DB/g-C 3 N 4 )and pristine g-C 3 N 4, respectively. This study provides new insights into the development of low-cost and sustainable photocatalysts for photocatalytic hydrogen production.

KW - Bio-template

KW - Carbon doping

KW - g-C N

KW - Light-harvesting

KW - Photocatalytic hydrogen production

UR - http://www.scopus.com/inward/record.url?scp=85064646581&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85064646581&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2019.02.243

DO - 10.1016/j.ijhydene.2019.02.243

M3 - Article

VL - 44

SP - 13098

EP - 13105

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 26

ER -