Gold nanoparticles reduced and stabilized by sodium squarate in water that attach to cellulose fibers and catalyse the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with sodium borohydride.
Our work reports the hydrothermal
synthesis of a bimetallic composite
CoMoS, followed by the addition of cellulose fibers and its subsequent
carbonization under Ar atmosphere (CoMoS@C). For comparison, CoMoS
was heat-treated under the same conditions and referred as bare-CoMoS.
X-ray diffraction analysis indicates that CoMoS@C composite matches
with the CoMoS
4
phase with additional peaks corresponding
to MoO
3
and CoMoO
4
phases, which probably arise
from air exposure during the carbonization process. Scanning
electron microscopy images of CoMoS@C exhibit how the CoMoS material
is anchored to the surface of carbonized cellulose fibers. As anode
material, CoMoS@C shows a superior performance than bare-CoMoS. The
CoMoS@C composite presents an initial high discharge capacity of ∼1164
mA h/g and retains a high specific discharge capacity of ∼715
mA h/g after 200 cycles at a current density of 500 mA/g compared
to that of bare-CoMoS of 102 mA h/g. The high specific capacity and
good cycling stability could be attributed to the synergistic effects
of CoMoS and carbonized cellulose fibers. The use of biomass in the
anode material represents a very easy and cost-effective way to improve
the electrochemical Li-ion battery performance.
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