Correlation on precipitation parameters towards ferromagnetism and stabilization of the magnetite nanoparticles

• Main Authors: Suppiah, Durga Devi, Julkapli, Nurhidayatullaili Muhd, Johan, Mohd Rafie
• Format: Article
• Published: Elsevier 2022
• Subjects: QD Chemistry
• Online Access: http://eprints.um.edu.my/41356/

The conventional synthesis methods of magnetite nanoparticles by hydrothermal required high temperature and aging process, which results in an unstable magnetite phase. In this work, the focus is on producing magnetite nanoparticles by simple and sustainable titration methods with the variable in parameters on the precipitate growth rate and structure of iron oxide nanoparticles utilizing a single sulphate precursor. Iron salt precursor hydrolysis was faster at temperatures of 30 degrees C and 45 degrees C; hence the number of hydroxyl ions (OH ) needed to reach the equivalence point for the precipitate to form is lower, creating the highest percentage of magnetite nanoparticles. However, at 45 degrees C, larger magnetite nanoparticles were obtained hence higher magnetization through lower coercivity. Precipitating agent rate of addition increase leads to reaction sequence delay, favoring goethite nanoparticle formation and lower magnetization. The novel understanding of precipitation parameter synergistic effect has resulted in promising ferromagnetic and stabilization properties of magnetite nanoparticle synthesis.