• Raiane Dora Dos Santos, Jakeline

Abstract

<jats:p>Ni<jats:sub>0.5</jats:sub>Zn<jats:sub>0.5</jats:sub>Fe<jats:sub>2</jats:sub>O<jats:sub>4</jats:sub>, Mn<jats:sub>0.5</jats:sub>Zn<jats:sub>0.5</jats:sub>Fe<jats:sub>2</jats:sub>O<jats:sub>4</jats:sub>and Ni<jats:sub>0.2</jats:sub>Cu<jats:sub>0.3</jats:sub>Zn<jats:sub>0.5</jats:sub>Fe<jats:sub>2</jats:sub>O<jats:sub>4</jats:sub>nanoferrites were synthesized, characterized and evaluated in terms of their performance as catalysts in the methyl esterification reaction of soybean oil. The nanoferrites were synthesized by combustion and characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX). The XRD patterns show the presence of inverse spinel B(AB)<jats:sub>2</jats:sub>O<jats:sub>4</jats:sub>phase. The EDX results confirmed the stoichiometry of the nanoferrite systems, whose morphology consisted of large block-like agglomerates with a brittle aspect and a wide agglomerate size distribution. The results indicate that the Ni<jats:sub>0.5</jats:sub>Zn<jats:sub>0.5</jats:sub>Fe<jats:sub>2</jats:sub>O<jats:sub>4</jats:sub>nanoferrite was the most active catalyst in the esterification reaction, with conversion rates ranging from 40 to 91%.</jats:p>

Topics

• morphology
• phase
• scanning electron microscopy
• x-ray diffraction
• combustion
• Energy-dispersive X-ray spectroscopy