Abstract
Zinc oxide (ZnO) nanoparticle-decorated graphene oxide (GO) nanocomposites (NCs) were prepared by an economical and facile solution process with optimized parameters and their structural, morphologic, and chemical compositional characteristics were characterized by x-ray diffraction, fourier transform infrared (FTIR), Raman, scanning electron microscopy/energy-dispersive x-ray spectroscopy, high-resolution transmission electron microscopy and UV-visible analytical techniques. ZnO:GO NCs were used to develop efficient, sensitive chemical sensors with fast response and a short recovery time for acetone, chloroform, ethanol, benzene, and acetic acid volatile organic compounds (VOCs). Their response was studied at different temperatures from 20 to 40°C. Plots of resistance and time were used to determine the values of responsiveness, sensitivity, and response time. VOCs molecules physically adsorbed onto the surface of ZnO-decorated GO layers and chemically interacted with functional groups, inducing changes in resistance. Potential industrial applications of ZnO:GO NCs in chemical sensors for monitoring toxic VOCs are demonstrated.
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