Abstract:
pollutants. Due to their high sensitivity, low cost, good compatibility, and high
surface to volume ratio, semiconductor metal oxides at the nanoscale have
drawn more interest in utilizing them using gas sensing applications.
Additionally, by combining 2D materials like graphene oxide (GO), the
electron transport channel in these metal oxide semiconductor materials can
be enhanced, raising the sensitivity of the gas sensor. In this study, the effects
of time, temperature, and the amount of GO in the precursor solution were
investigated in relation to the enhancement of the morphology and purity of
hydrothermally synthesized reduced graphene oxide (rGO) / α-Fe2O3
nanocomposites. In order to explore the influence of temperature, a
temperature series of 150, 160, 170, 180, 190, and 200 °C was used, and to
study the effect of time, a time series of 16, 24, 32, 40, and 48 hours was used.
The effect of graphene oxide amount on the morphology and purity of rGO/
α-Fe2O3 nanocomposites synthesized via a one-step hydrothermal process was
studied using a series of 0.01 g, 0.02 g, 0.03 g, 0.04 g, 0.05 g, and 0.06 g
graphene oxide in the precursor solution.The obtained SEM images
demonstrated the presence of 2D hexagonal α-Fe2O3 nano-plates with welldefined
sharp edges at 200 °C, 40-hour reaction conditions, and 0.05 g of GO
in the precursor solution. XRD patterns of these samples showed the existence
of the pure α-Fe2O3 phase with rGO.
