Room Temperature Gas Sensing Properties of Sn-Substituted Nickel Ferrite (NiFe2O4) Thin Film Sensors Prepared by Chemical Co-Precipitation Method

A reliable chemiresistive sensor of nickel-doped tin oxide (Ni-SnO2) for sensing carbon dioxide gas and humidity

“…From this gure, it can be seen that the sensitivity of the Ni-SnO 2 sensors increases with the nickeldoping level, suggesting a moderate repeatability signature. 13,49 The sensitivity of the pristine SnO 2 and Ni-SnO 2 sensors with the operating temperature increased and then decreased (Fig. 8c).…”

“…11 SnO 2 being an n-type metal oxide is a chemiresistive sensor because of its large band gap (3.40 eV), d-10 electronic conguration, high reactivity against pollutant gases, moderate chemical stability, high reactive surface, and quantum connement. [12][13][14] It has been widely used in oxidation catalysts, 15 gas sensors, 16 conducting electrodes 17 and optoelectronic devices. 18 The electronic structure of tin oxide changes in accordance with doping, the inuence of surfactants and thermal annealing processes.…”

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“…The electrochemical performance of spinels ferrites has also been studied for their applications as supercapacitors [9] and battery-type electrodes [10]. These materials have also been studied as photocatalysts for water splitting [5,[11][12][13], gas sensors [14,15], electrocatalyis for the oxygen evolution reaction (OER) [16,17], degradation of organic compounds by heterogeneous Photo-Fenton reactions [18][19][20][21][22], and biomedical applications [23,24].…”

“…Several synthesis methodologies have already been used to produce ferrites including co-precipitation [14,32], proteic sol-gel [10], hydrothermal [33][34][35], solvothermal [36][37][38], conventional sol-gel [29], combustion [39], solid state reaction [40], solution blow spinning [16], and complexation [41]. The sol-gel process is one of the most accepted methods for producing ferrites where chelates are formed through a complexation reaction between multivalent ions and citric acid, a multidentate ligand [30,42].…”

Effect of manganese doping on the magnetic and magnetocaloric properties of zinc ferrite

“…MnZn ferrites attracted considerable investigations because of their potential applications in catalysis, magnetic storage, cancer therapy, medical imaging and electronic devices. [1][2][3][4][5] The chemical processes currently in vogue for the synthesis of MnZn ferrite particles include co-precipitation, [6][7][8][9] the sol-gel auto-combustion method, [10][11][12][13] the solid-state reaction method, [14][15][16] solvothermal technique, [17][18][19] microwave processing technique, [20][21][22] hydrothermal synthesis etc. [23][24][25][26][27] The solvothermal technique has the advantages of functioning at low temperatures, being a simple, lowcost synthetic process, exhibiting an ease of compositional control and producing ultrafine particles with a narrow-sized distribution.…”