▎ 摘　　要

NOVELTY - Preparing hydrotalcite-based heterogeneous material comprises (i) adding 10 g graphite oxide into 50 ml mixed alkali solution of sodium hydroxide (0.2 M) and anhydrous sodium carbonate (0.05 M) and ultrasonically processing for 30 minutes; (ii) stirring and adding 50 ml salt solution of nickel nitrate (0.075 M) and aluminum nitrate (0.025 M) at room temperature to obtain suspension and adjusting pH to 0.5; and (iii) crystallizing the suspension at 600 degrees C for 6 hours, stirring and continuously heating to 83 degrees C, quickly adding 34 mg/ml sodium sulfate solution, refluxing for 4 hours, cooling to room temperature, washing for three times with deionized water and drying at 60 degrees C for 24 hours. USE - The method is useful for preparing hydrotalcite-based heterogeneous material, preferably nickel-aluminum hydrotalcite/graphene composite material. ADVANTAGE - The material has high electrochemical activity and high electrical conductivity.