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Biofilm-Assisted Fabrication of Ag@SnO2‑g‑C3N4 Nanostructures for Visible Light-Induced Photocatalysis and Photoelectrochemical Performance
journal contribution
posted on 2019-08-19, 16:40 authored by Akbar Mohammad, Md Rezaul Karim, Mohammad Ehtisham Khan, Mohammad Mansoob Khan, Moo Hwan ChoDevelopment
of advanced materials with a benign environmentally friendly approach for heterogeneous
visible light photocatalysis is always preferable. An environmentally
favorable approach was used to anchor silver nanoparticles (Ag NPs)
to tin oxide-decorated-graphitic carbon nitride (SnO2-g-C3N4) using a biofilm as a green
reducing tool for the biogenic synthesis of 1–6 mM Ag@SnO2-g-C3N4 nanostructures
(NSs). The fabricated NSs were characterized using sophisticated techniques.
The developed Ag@SnO2-g-C3N4 NSs showed a well-defined spherical-shaped Ag NPs anchored
to SnO2-g-C3N4 NSs.
The synthesized NSs were applied for photocatalytic degradation of
hazardous dyes and photoelectrochemical studies. A comparative investigation
of Ag@SnO2-g-C3N4 NSs for the visible light-assisted photocatalytic degradation of
Methylene blue (MB), Congo red (CR), and Rhodamine B (RhB) was performed.
The photocatalytic degradation of MB, CR, and RhB reached ∼99%
in 90 min, ∼98% in 60 min, and ∼94% in 240 min, respectively.
The anchoring of Ag NPs to SnO2-g-C3N4 NSs further enhanced the visible light photocatalytic
degradation of the dyes due to surface plasmon resonance and by lowering
the recombination of the photogenerated electrons and holes. Further,
high electron transfer ability of Ag@SnO2-g-C3N4 NSs was investigated by electrochemical
impedance spectroscopy to understand the mechanistic insights of the
excellent activity under visible light irradiation. Hence, the present
study provides an environmentally benign approach for the synthesis
and excellent visible light effective photocatalysis and photoelectrochemical
performance.
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C 3 N 4C 3 N 4 NSselectrochemical impedance spectroscopyCRC 3 N 4 nanostructurestin oxide-decorated-graphitic carbon nitrideapproachMBlight-assisted photocatalytic degradationSnO 2Photoelectrochemical Performance Developmentphotocatalytic degradationelectron transfer abilitysurface plasmon resonancespherical-shaped Ag NPsminlight photocatalytic degradationAg NPsanchor silver nanoparticlesVisible Light-Induced Photocatalysis
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