Cellulose/chitosan magnetic composite material as well as preparation method and application thereof

The invention relates to the technical field of cellulose magnetic aerogel preparation, in particular to a cellulose/chitosan magnetic composite material and a preparation method and application thereof. Comprising the following steps: preparing NaOH, urea and deionized water into a solution, and pre-cooling to-12 DEG C to form an alkali urea system; the preparation method comprises the following steps: adding cellulose and chitosan into an alkali urea system, fully stirring, naturally melting to form a uniform clear water state to obtain a composite solution, adding nano Fe3O4 into the composite solution, and ultrasonically dispersing uniformly to obtain a magnetic dispersion liquid; the magnetic dispersion liquid is dropwise added into a hydrochloric acid solution containing CaCl2 by adopting a suspension droplet method to obtain microspheres, the microspheres are filtered and washed to be neutral, the microspheres are subjected to repeated freezing-unfreezing treatment by adopting a freezing-thawing method