The invention discloses a
cellulose-based three-dimensional
porous composite material supporting nano-
zinc oxide and a preparation method thereof. The preparation method includes the steps of: 1) according to weight percentage ratio, successively dispersing 40-60% of a
cellulose-[beta]-
cyclodextrin composite material, 40-60% of PAMAM-modified konjac, and 1-5% of a pore-forming agent in deionized water, bath ratio being 1:50, performing ultrasonic mixing to uniform, and performing stirring reaction at normal temperature for 24 h at
constant speed; 2) pouring a
reaction product into a mould, placing the mould in
liquid nitrogen for 1 min, taking the mould out, pre-freezing the
reaction product in a refrigerator for 6 h at -20 DEG C, freezing the
reaction product in a Thermo ultra-low temperature refrigerator for 6 h at -80 DEG C, and
processing the reaction product in a freeze-
drying machine for 48 h to obtain the
cellulose / konjac /
cyclodextrin three-dimensional
porous composite material;and 3) with electrostatic effect as film forming driving force, performing layer by layer self-
assembly on the surface of the three-dimensional
porous composite material with the nano-
zinc oxide. Inthe invention, with the konjac, cellulose, beta-
cyclodextrin and
zinc oxide as the raw materials, the method has sufficient raw materials and low cost. The material has important application value inthe fields such as
photocatalysis, photoelectric materials, adsorption materials, biomaterials, etc.