Resumen

DA DALT, Silvana; SOUSA, Bruna Berti; ALVES, Annelise Kopp  y  BERGMANN, Carlos Pérez. Structural and photocatalytic characterization of BaFe₂O₄ obtained at low temperatures. Mat. Res. [online]. 2011, vol.14, n.4, pp. 505-507.  Epub 14-Oct-2011. ISSN 1516-1439.  http://dx.doi.org/10.1590/S1516-14392011005000069.

Barium monoferrite BaFe₂O₄ classified as permanent magnet stands out among other ceramic magnets due to its high chemical stability, corrosion resistance and low production cost. In addition, experiments conducted on photocatalytic degradation of methyl orange and UV transmittance by spectrophotometry have shown that this material has photocatalytic properties. The spinel ferrite is of importance in many technological areas such as computing, communications and security. Several techniques for synthesis have been studied to optimize the properties of this material. The synthesis of BaFe₂O₄ by conventional processes often occurs at temperatures above 1000 ºC. In this work, we obtained the phase BaFe₂O₄ at low temperatures (600 ºC) from the combustion reaction using nitrates and maleic anhydride as metal complexing agent. Techniques of X-ray diffraction, specific surface area, thermogravimetry analysis and photocatalytic analysis were employed to characterize the products obtained.

Palabras llave : barium monoferrite; combustion reaction; photocatalysis.