1 research outputs found
Freeze-Casting of Multifunctional Cellular 3D-Graphene/Ag Nanocomposites: Synergistically Affect Supercapacitor, Catalytic, and Antibacterial Properties
Developments of new
and highly effective multifunctional materials
have been shown great interest in recent years. Herein, we report
a simple, cost efficient, one-step, surfactant-free cellular 3D-graphene/Ag
nanocomposite using the freeze-casting method and explore it further
for supercapacitor, catalytic, and antibacterial applications. FE-SEM
and HRTEM analyses of nanocomposites revealed a 3D-cellular network
structure having continuous micrometer size open pores with uniformly
decorated Ag nanoparticles of an average size of 25 nm. An electrochemical
study exhibited the highest specific capacitance at 845 Fg<sup>–1</sup> at 5 mV s<sup>–1</sup> and excellent cyclic retention ∼97%
even after 1000 cycles. Further, 3D-graphene/Ag nanocomposites are
applied as catalyst to reduce methylene blue using NaBH<sub>4</sub>. A rate of reduction above 99% was attained for 3D-graphene/Ag (40%)
nanocomposites, which is significantly higher than that of pristine
3D-graphene. The network like structure of the 3D-graphene/Ag nanocomposite
filtered out 37% of the population from total bacterial strains. Also,
the 3D-graphene/Ag nanocomposite killed almost 100% of the bacterial
strains after 3 h of incubation due to a merging effect of Ag ions
and 3D-graphene