▎ 摘　　要

NOVELTY - Preparing aerogel involves dispersing graphene oxide in deionized water to obtain graphene oxide dispersion. Copper(II) nitrate is dissolved in deionized water to obtain copper(II) nitrate dispersion. The obtained graphene oxide dispersion and copper(II) nitrate dispersion are mixed dispersion. The mixed dispersion is added with ethylenediamine solution under stirring to obtain mixture. The obtained mixture is added with sodium hydroxide or potassium hydroxide in strong alkaline solution. The mixture is mixed with reducing agent, and sonicated for 15-30 minutes. USE - Method for preparing aerogel used for preparing nanowires used in sensors, supercapacitors or sewage treatment (all claimed). ADVANTAGE - The method enables to prepare aerogel, which prepares nanowires having three-dimensional structure and good compression strength. DETAILED DESCRIPTION - Preparing aerogel involves dispersing graphene oxide in deionized water to obtain graphene oxide dispersion. Copper(II) nitrate is dissolved in deionized water to obtain copper(II) nitrate dispersion. The obtained graphene oxide dispersion and copper(II) nitrate dispersion are mixed dispersion. The mixed dispersion is added with ethylenediamine solution under stirring to obtain mixture. The obtained mixture is added with sodium hydroxide or potassium hydroxide in strong alkaline solution. The mixture is mixed with reducing agent, and sonicated for 15-30 minutes. The sonicated mixture is placed in water bath at 60-90 degrees C for 25-50 minutes to obtain reddish brown product. The obtained reddish brown product is washed with deionized water and ethanol solution by centrifuging. The obtained reddish brown product is dried under vacuum to obtain reddish brown powder. The obtained 10-30mg/mL reddish brown powder solution is mixed with 10-20mg/mL sodium alginate solution, polyvinyl alcohol solution, chitosan solution and gelatin solution to obtain mixed solution. The mixed solution is frozen at -5 degrees C to -20 degrees C for 2-5 hours. The frozen product is freeze-dried for 2-5 days to obtain the desired product.