Abstract
This paper compared the effects of A. indica plant proteins over chemical methods in the morphology of zinc oxide nanoparticles (ZnO NPs) prepared by a co-precipitation method, and ethanol sensing performance of prepared thin films deposited over a fluorene-doped tin oxide (FTO) bind glass substrate using spray pyrolysis technique. The average crystallite sizes and diameters of the grain-sized cluster ZnO NPs were 25 and (701.79 ± 176.21) nm for an undoped sample and 20 and (489.99 ± 112.96) nm for A. india dye-doped sample. The fourier transform infrared spectroscopy (FTIR) analysis confirmed the formation of the Zn–O bond at 450 cm−1, and also showed the presence of plant proteins due to A. indica dye extracts. ZnO NPs films exhibited good response (up to 51 and 72% for without and with A. indica dye-doped extracts, respectively) toward ethanol vapors with quick response-recovery characteristics at a temperature of 250 °C for undoped and 225 °C for A. indica dye-doped ZnO thin films. The interaction of A. indica dye extracts helps to decrease the operating temperature and increased the response and recovery rates of the sensor, which may be due to an increase in the specific surface area, resulting in adsorption of more oxygen and hence high response results.
Highlights
Gas tracking devices are becoming increasingly popular for a variety of physical, chemical, and biological purposes
The current research examines how A. indica dye extract is used to generate and analyze zinc oxide nanoparticles (ZnO NPs) as well as how it functions as a vapor detector
The sharp diffraction peak indicates the good crystallinity of the prepared ZnO NPs [23]
Summary
Gas tracking devices are becoming increasingly popular for a variety of physical, chemical, and biological purposes. Zinc oxide (ZnO) is a set II–VI n-type semiconductor with a vast band gap (3.3 eV) and exceptional assets, such as high exciton binding energy (60 MeV) [14], transparency in the visible region and strong infrared reflectivity [15], excellent audio characteristics and outstanding electronic chattels [16], high electron mobility (100 cm v−1s−1) [17], strong room-temperature luminescence, high chemical and thermal stability, abundance in nature, and environmental friendliness [18] This unique property makes ZnO a proficient semiconducting material in gas sensors. The biological production of ZnO NPs utilizing plant extracts, such as leaves, roots, flowers, and seeds as a bio template, is of particular interest to researchers [12] This green technique has various advantages, including environmentally friendliness, shorter time, lower-cost precursors, and a higher-purity result; the handling procedure is easy and does not require expensive equipment [13]. The current research examines how A. indica dye extract is used to generate and analyze ZnO NPs as well as how it functions as a vapor detector
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
