Nanorods to nanosheets structural evolution of NixZn1-xO for NO2 gas sensing application
2018; Elsevier BV; Volume: 766; Linguagem: Inglês
10.1016/j.jallcom.2018.07.040
ISSN1873-4669
AutoresSupriya B. Jagadale, Vithoba L. Patil, Sawanta S. Mali, S.A. Vanalakar, Chang Kook Hong, P.S. Patil, H.P. Deshmukh,
Tópico(s)Transition Metal Oxide Nanomaterials
ResumoIn the present study the efforts are taken to fabricate NixZn1-xO nanostructures (x = 0.04, 0.08, 0.12, 0.16 and 0.2) thin film by simple hydrothermal method. The prepared thin films were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), photoluminescence (PL) spectroscopy and two probe resistivity technique. Interestingly, it was found that the morphology of the nanostructures evolved from rod-like to sheet-like structures with variation in the concentration of Ni in ZnO from x = 0.04 to 0.16. The NixZn1-xO thin films of all compositions were tested for the gas sensing behavior for the oxidizing gas; NO2 (Nitrogen dioxide). It is found that, the sensing response increases with increase in the Ni2+ concentration up to x = 0.16, and then it decreases slightly for further increment in Ni2+. The Ni0.16Zn0.84O film shows higher response (S) = 9.01 for 8 ppm NO2 at comparatively low operating temperature. Additionally, NixZn1-xO thin film sensor has potentially detected 1 ppm of NO2 gas with admirable response ∼1.45.
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