Preparation method of carbon-based solid amine for direct air carbon capture

The invention discloses a preparation method of carbon-based solid amine for direct air carbon capture, and relates to a preparation method of carbon-based solid amine. The invention aims to solve the problems of low adsorption capacity for capturing CO2 in air, low CO2 absorption rate under low concentration, low tolerance degree for moisture in air, tedious raw material processing and adsorbent preparation process, high cyclic regeneration energy consumption and high production and application cost of the existing adsorbent. According to the method, solid amine loading is carried out on a carbon-based carrier through an impregnation method, and the method specifically comprises the steps that 1, organic amine is added into a dispersing agent, then ultrasonic oscillation is carried out, and a uniform amine solution is obtained; step 2, adding activated carbon into the ammonia solution, then carrying out ultrasonic oscillation, and then continuously stirring so that amine is uniformly and fully loaded on the