Effect of synthesis method and morphology on the enhanced CO2 sensing properties of magnesium ferrite MgFe2O4

Sumangala, T. P.; Pasquet, Isabelle; Presmanes, Lionel; Thimont, Yohann; Bonningue, Corine; Venkataramani, N.; Prasad, Shiva; Baco-Carles, Valérie; Tailhades, Philippe; Barnabé, Antoine

doi:10.1016/j.ceramint.2018.07.082

Cited by 31 publications

(1 citation statement)

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“…In addition, the immense capacity to modify ferrites' properties opens the possibility to design materials with novel functionalities. The chemical composition and the crystal structure are the two main aspects that define their characteristics, which can be controlled by an appropriate synthesis and processing route [1][2][3][4] . These materials can be applied in a wide range of technological applications, such as biomedicine 5,6 , electronics 7,8 or energy storage 9,10 .…”

Section: Introductionmentioning

confidence: 99%

Influence of the Synthesis Route in Obtaining the Cubic or Tetragonal Copper Ferrite Phases

Rosa

Segarra

2020

Inorg. Chem.

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In this work, magnetic copper ferrite nanoparticles are synthesized by polymer-assisted sol-gel and co-precipitation methods. The obtained purity and particle size reach values of 96 % and 94 nm, respectively. Evident differences in the crystal structure have been found in the synthesized nanoparticles. A tetragonal structure is formed by the sol-gel method, while the cubic form is obtained when the co-precipitation approach is used. This work provides an experimental evidence of the formation of both phases by using the same reactants and thermal conditions, and only modifying the technical procedure. The formation and stability of each phase is analysed by temperature dependent measurements, and the observed crystal structure differences are used to propose a potential fundamental explanation to our observations based on a difference on the cations' distribution and the Jahn-Teller distortion. Moreover, different copper ferrite purity and particle sizes are found when using each of the methods. The spherical shape of the particles and their tendency to sinter forming micrometric clusters are observed by electron microscopy. Finally, the divergence in magnetization between the samples prepared by each method support our argument about the different cations' distribution and open the door to a wide range of different technological applications for these materials.

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