▎ 摘　　要

NOVELTY - Carbon dioxide adsorbent comprises 4-8 pts. wt. graphene nitride, 10-20 pts. wt. tetraethylenepentamine, and 10-15 pts. wt. carrier. USE - Carbon dioxide adsorbent. ADVANTAGE - The carbon dioxide adsorbent has stable desorption performance, the raw material adopts soybean as a nitrogen source, the soybean can adopt waste soybean as raw material, changing waste into valuable, and greatly reducing the cost, and has high practicability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing carbon dioxide adsorbent, which involves: (A) taking graphene oxide, placing in a tubular furnace, calcining under 680-700 degrees C; (B) introducing ammonia gas, and preserving temperature in the ammonia gas atmosphere; (C) cooling to room temperature under the nitrogen environment after processing to obtain the graphene nitride; (D) taking titanium trichloride, placing in the mixed acid solution, mixing and stirring to obtain solution A; (E) taking soybean, removing seed coat, cleaning by de-ionized water, then soaking in diluted hydrochloric acid solution; (F) taking out and washing by de-ionized water, then placing in solution A; (G) adding surfactant, tetraethyl orthosilicate and ethanol, stirring and reacting for 3-5 hours, standing and soaking, drying and raising the temperature to 500-520 degrees C, keeping the temperature and calcining 2-2.2 hours; (H) cooling with the furnace to obtain the carrier; (I) taking the carrier and tetraethylene pentamine, methanol to dissolve, mixing and stirring under the 20-30 degrees C; (J) adding graphene nitride, ultrasonically dispersing for 1-2 hours, constant temperature processing for 4-5 hours at 140-150 degrees C; (K) cooling to room temperature; and (L) drying under the 60-80 degrees C to obtain the finished product.