Abstract
Plants, animals and compost are the main cause to enable urea in the environment. Beyond a certain level urea creates various problems. Thus for the environmental and biological protection it is required to detect the concentration of urea in various samples. In the present investigation zinc oxide (ZnO)-multiwalled carbon nanotube (MWCNT) nanocomposites were prepared by sol–gel technique for urea sensing. The fabricated sensor was characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), and energy dispersive x-ray spectroscopy (EDX). The sensing property for detecting urea was studied by resistance measurements in the urea concentration range of 0–200 ppm and in the varying temperature of 0–300 °C. Results have indicated that ZnO-MWCNT nanocomposite based sensor has higher sensing properties as compared to ZnO and MWCNT alone. ZnO-2 wt% MWCNT exhibited highest response value for 100 ppm urea concentration at 150 °C.
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