Nano high-entropy oxide aerogel and preparation method thereof

The invention provides nano high-entropy oxide aerogel and a preparation method thereof, and the preparation method comprises the following steps: step 1, dissolving a carbon-containing carbohydrate compound in water to obtain a carbohydrate substrate solution; dissolving nitrate in water to obtain a nitrate solution; step 2, adding the nitrate solution into the saccharide substrate solution, and stirring to obtain a nitrate-saccharide solution; step 3, adding an alcohol solvent into the nitrate-saccharide solution, and stirring to obtain a nitrate-saccharide-alcohol solution; step 4, drying the nitrate-saccharide-alcohol solution to obtain a gelatinous solution; step 5, freeze-drying the dried gel-like solution to obtain a freeze-dried gel-like solution; and step 6, carrying out thermal reaction on the frozen and dried gel-like solution in an air atmosphere at 400-600 DEG C to form the high-entropy oxide aerogel. According to the present invention, the microstructure is sheet-shaped, the specific surface are