Magnetic date palm charcoal nanocomposites and synthesis thereof

A date palm charcoal iron oxide nanocomposite prepared according to a process comprising:

• preparing date palm charcoal by heating raw date palm waste in a slow pyrolysis process;
• grinding the date palm charcoal to obtain a fine powder of date palm charcoal;
• adding the fine powder of date palm charcoal and ferric nitrate to one or more solvents to obtain a mixture;
• drying the mixture to obtain a carbon matrix of iron oxide magnetic nanoparticles;
• and
• separating the carbon matrix of iron oxide magnetic nanoparticles from non-magnetic carbon particles to obtain the date palm charcoal iron oxide nanocomposite, the date palm charcoal iron oxide nanocomposite having an average size less than 20 nm.