Effect of calcination temperature on magnetic, structural, thermal and optical properties of BFO-T nanoparticles

Abstract

BFO-T (BiFeO 3 ) nanoparticles have been prepared via auto-combustion technique using tartaric acid as a chelating agent. Role of chelating agent and effect of different calcination temperatures on the structural, morphological, optical, thermal and magnetic behaviour were demonstrated. The properties related to phase structure, surface morphology, thermal stability were investigated by XRD, TEM and TGA respectively. Fourier Transformed Infrared spectra of BFO-T nanoparticles calcinated at different temperatures showed various types of bond formations in the samples. The average particle size of BFO-T nanoparticles were found to be in the range 6-30 nm at different calcinated temperature. The optical band gaps of pure BFO-T nanoparticles were estimated using the Tauc's equation which was found to be 2.20 eV. Magnetic measurement of pure BFO-T nanoparticles indicated ferromagnetic behavior with saturation magnetization of 0.36 emu/g.

Rational synthesis and characterization of temperature switching ZnFe2O4/ZnO nanocomposites used for anti-bacterial, anti-oxidant and seed germination properties

“…Furthermore, the increase in the particle size of nanocomposites at higher temperatures was caused by the rise in diffraction peak sharpness and intensity with temperature. 78 The calculated crystallinity increases from 60.51% to 78.43% when the calcination temperature of the synthesized composites increases from 300 °C to 750 °C (Table S5, ESI†). The micro-strain and dislocation density decrease from IZ 1 to IZ 4.…”

Effect of Calcination Temperature on the Morphology, Crystallinity, and Photocatalytic Activity of ZnO/TiO2 in Selenite Photoreduction from Aqueous Phase

“…The wavelengths at which all the ZnO/TiO2 samples absorbs light were determined using the UV-vis spectrophotometer. The band gaps of all the calcined samples were determined through Tauc plot method [44]. Table 1 gives the maximum wavelength and band gap variation with calcination temperature.…”

Atomic scale insights on the growth of BiFeO3 nanoparticles

“…and in addition plays an important role in the phase purity, controlling shape, size distribution and crystalline nature of the products 43 – 45 . Phase pure BiFeO 3 nanoparticles were reported to have been prepared using sol–gel method with tartaric acid as the fuel 33 , 43 , 44 , 46 , 49 , subsequent to calcination close to 700 K, though the dried precursor as obtained due to the reaction was reported to be of amorphous phase as deduced using XRD.…”