Preparation: |
synthesized following the same procedure as used by [JGHF05]; washing of the precipitate, iron oxide suspension was poured into a crystallization beaker and dried at 60 °C for 48 h, dried precipitate was gently ground by hand in an agate mortar, followed by air oxidation at 240 °C for 20 h, cooling, the formed maghemite was stored in a desiccator using silica gel as a drying agent |