Effects of precursor types of Fe and Ni components on the properties of NiFe2O4 powders prepared by spray pyrolysis

Synthesis of ferrite spinel NiFe2O4 by thermal hydrolysis and its magnetic properties

“…For the sol gel technique, the influence of particle sizes at the same temperature of thermal treatment (873 K) leads to variations of 16% in saturation magnetization at 298 K [7,8], whereas for samples obtained by the hydrothermal method at 433 K the variations in the respective characteristics reach 73% [6,12]. From the published data, it also follows that the influence of the modes of thermal treatment is much stronger: for the sol gel technique according to the data in [9], upon an increase in temperature of thermal treatment, the val ues of the saturation magnetization at 298 K vary by 38% and the coercive force decreases, whereas according to the data in [8] upon an increase in tem perature of thermal treatment the value of M S increases by 19% and H C as a function of T S is nonlin ear. Therefore, a comparison of the results by different scientists should be performed with consideration for the influence of the aforementioned factors.…”

“…The authors [6] note significant variations of certain magnetic characteristics of the powders obtained in this way in comparison with ultrafine powders which consist of irregular globular shape: decrease in coercive force and increase in satu ration magnetization. In addition, the sol gel method [7,8], pyrolysis [9], and coprecipitation [10] were applied. All these methods have their drawbacks related to complicated hardware implementation of the processes, high temperatures, and extended time of the synthesis.…”

Synergistic influence of mesoporous spinel nickel ferrite on the electrocatalytic activity of nano-structured palladium

“… 10 For instance, Gao et al prepared a Pd–NiFe 2 O 4 catalyst, which significantly increased the catalytic efficiency. 11,12 Numerous articles have reported various methods of fabricating NiFe 2 O 4 such as spray pyrolysis, 13 coprecipitation, 14 mechanical activation, 15 hydrothermal methods, 16 and sol–gel synthesis. 17 The solution combustion process is a useful and one-step synthesis for the fabrication of metal-oxide catalysts.…”

Enhancing a Novel Robust Multicomposite Materials Platform for Glucose Biosensors

“…Nickel ferrite (NiFe 2 O 4 ) is also one of the most important materials that can be used for biosensors applications due to its notable electrocatalytic property [7]. Conventional methods for NiFe 2 O 4 preparation [8], such as mechanosynthesis [9], sol-gel processing [10], solvothermal processes [11], spray pyrolysis [12], hydrothermal processes [13] and microwave assisted combustion methods [14], are generally quite difficult to control its size and morphology [15]. Therefore coprecipitation is an appealing technique due to its advantages of homogeneity, small particle size, low temperature preparation and simple process [16].…”