Synthesis of ZnO nanopetals and its application as NO2 gas sensor

Sonker, Rakesh K.; Sabhajeet, S. R.; Singh, Satyendra; Yadav, B. C.

doi:10.1016/j.matlet.2015.03.112

Cited by 131 publications

(38 citation statements)

References 10 publications

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“…The chemical procedures used for preparing nanosized ZnO NPs include solvothermal, sol-gel, sonochemical, electrodeposition, hydrothermal and spray pyrolysis. [10][11][12][13][14] However, synthesis by physical and chemical means has disadvantages. Physical methods require large amounts of energy and are timeconsuming while chemical methods produce noxious chemicals, which are unfriendly for the environment.…”

Section: Introductionmentioning

confidence: 99%

Optical, morphological and biological analysis of zinc oxide nanoparticles (ZnO NPs) using Papaver somniferum L.

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Optical, morphological and biological analysis of zinc oxide nanoparticles (ZnO NPs) using Papaver somniferum L.

et al. 2019

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“…A Fourier transform infrared spectroscopy (Thermo Scientific, USA, Nicolet TM 6700) was used to study the optical properties of ZnO and ZnO-SWCNT thin films. For studying the gas sensing properties, gas dilution system developed by our group was utilized [9]. Two platinum electrodes were grown on ZnO thin film and NO2 gas was injected by syringe in to the test chamber.…”

Section: A Experimental Techniquesmentioning

confidence: 99%

Synthesis of Zno/CNTS Nanocomposite Thin Film and Its Sensing

Sonker¹,

Chaudhary²

2016

Int. Jour. Appl. Bio-Eng.

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Semiconductor metal oxides (SMOs) with nanostructures as gas sensing material have been widely used in detection of toxic gases and vapours. The gas sensing properties of the SMO-based sensors are highly dependent not only on their surface chemical reactivity and thermal stability but also on the geometrical and compositional variation. Nitrogen dioxide (NO2) is a typical air pollutant that causes environmental problems. The exact detection of ultra-low concentrations of NO2 is becoming very important now days. In order to enhance the sensitivity of carbon nanotube based chemical sensors at room temperature operation, SWCNTs/ZnO nanocomposite was prepared under chemical reaction condition. The layer of deposition was applied for the spin coating of the inner and outer SWCNTs walls with thin films of ZnO of precisely controlled thicknesses. Differently treated SWCNTs with different degree of surface functionalization were used as support for the oxide films. The sensing properties of the obtained composite materials towards NO2 were investigated and related to the morphological and microstructural characteristics of both the coating and support. ZnO-based composites on SWCNTs treated at 300 °C show enhanced performance as sensors, making them suitable for practical applications. Sensor structure showed a better sensing response (S ~ 1.51×10 2 ) at operating room temperature towards 20 ppm NO2 gas with an average response times of about 2.45 min.

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“…In order to monitor air pollution on a large scale, inexpensive, reliable and easy to use gas sensors are needed.The electrical resistance of semiconductor oxides, such as SnO 2 , ZnO, TeO 2 ,WO 3 and Fe 2 O 3 , has a strong dependence on the concentration of surrounding gases. According to this principle, these oxides are commercially designed as chemical sensors to detect toxic gases such as LPG, and NO 2 [3,4]. Ferric oxide is considered to be the most promising highly sensing materials of sensors due to the temperature dependent surface morphology and photo catalytic activity [5].…”

Section: Introductionmentioning

confidence: 99%