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Enhancement of visible light photocatalytichydrogen evolution by bio-mimetic c-dopedgraphitic carbon nitride

Mohamed, Mohamad Azuwa and M. Zain, M. F. and Minggu, Lorna Jeffery and Kassim, Mohammad B. and Jaafar, Juhana and Saidina Amin, Nor Aishah and Mohd. Hir, Zul Adlan and Rosmi, Mohamad Saufi (2019) Enhancement of visible light photocatalytichydrogen evolution by bio-mimetic c-dopedgraphitic carbon nitride. International Journal of Hydrogen Energy, 44 (26). pp. 13098-13105. ISSN 0360-3199

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Official URL: http://dx.doi.org/10.1016/j.ijhydene.2019.02.243

Abstract

Bio-mimetic C-doped graphitic carbon nitride (g-C3N4)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-C3N4 as compared to the direct impregnation approach. The introduction of in-situ C doping in the g-C3N4 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-C3N4 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-C3N4)approach exhibits excellent photocatalytic hydrogen production with an H2 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-C3N4)and pristine g-C3N4, respectively. This study provides new insights into the development of low-cost and sustainable photocatalysts for photocatalytic hydrogen production.

Item Type:Article
Uncontrolled Keywords:bio-template, carbon doping
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:87845
Deposited By: Yanti Mohd Shah
Deposited On:30 Nov 2020 21:28
Last Modified:30 Nov 2020 21:28

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