Biofilm-Assisted Fabrication of Ag@SnO<sub>2</sub>‑<i>g</i>‑C<sub>3</sub>N<sub>4</sub> Nanostructures
for Visible Light-Induced Photocatalysis and Photoelectrochemical
Performance
Akbar Mohammad
Md Rezaul Karim
Mohammad Ehtisham Khan
Mohammad Mansoob Khan
Moo Hwan Cho
10.1021/acs.jpcc.9b05105.s001
https://acs.figshare.com/articles/journal_contribution/Biofilm-Assisted_Fabrication_of_Ag_SnO_sub_2_sub_i_g_i_C_sub_3_sub_N_sub_4_sub_Nanostructures_for_Visible_Light-Induced_Photocatalysis_and_Photoelectrochemical_Performance/9681731
Development
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 (SnO<sub>2</sub>-<i>g</i>-C<sub>3</sub>N<sub>4</sub>) using a biofilm as a green
reducing tool for the biogenic synthesis of 1–6 mM Ag@SnO<sub>2</sub>-<i>g</i>-C<sub>3</sub>N<sub>4</sub> nanostructures
(NSs). The fabricated NSs were characterized using sophisticated techniques.
The developed Ag@SnO<sub>2</sub>-<i>g</i>-C<sub>3</sub>N<sub>4</sub> NSs showed a well-defined spherical-shaped Ag NPs anchored
to SnO<sub>2</sub>-<i>g</i>-C<sub>3</sub>N<sub>4</sub> NSs.
The synthesized NSs were applied for photocatalytic degradation of
hazardous dyes and photoelectrochemical studies. A comparative investigation
of Ag@SnO<sub>2</sub>-<i>g</i>-C<sub>3</sub>N<sub>4</sub> 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 SnO<sub>2</sub>-<i>g</i>-C<sub>3</sub>N<sub>4</sub> 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@SnO<sub>2</sub>-<i>g</i>-C<sub>3</sub>N<sub>4</sub> 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.
2019-08-19 16:40:46
C 3 N 4
C 3 N 4 NSs
electrochemical impedance spectroscopy
CR
C 3 N 4 nanostructures
tin oxide-decorated-graphitic carbon nitride
approach
MB
light-assisted photocatalytic degradation
SnO 2
Photoelectrochemical Performance Development
photocatalytic degradation
electron transfer ability
surface plasmon resonance
spherical-shaped Ag NPs
min
light photocatalytic degradation
Ag NPs
anchor silver nanoparticles
Visible Light-Induced Photocatalysis