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以醋酸钴为原料,在甲醇体系中采用溶剂热法合成了由纳米片自组装而成的花状(CH_3O)_2Co前驱体微球。将前驱体焙烧后,得到了形貌保持良好的花状多孔Co_3O_4微球。利用X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、热重(TG)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和N_2吸附-脱附等手段对样品的物相、化学组成、形貌及孔结构进行了表征。采用差示扫描量热(DSC)技术评价了Co_3O_4花状微球对高氯酸铵(AP)的热分解催化作用。结果表明,花状Co_3O_4微球对AP热分解过程具有良好的催化活性,添加2%(质量分数)的Co_3O_4可使AP的高温分解峰值温度降低122℃,表观分解热提高422 J/g。优异性能的发挥归因于其良好的分散性和丰富的级次孔结构。
The flower-like (CH_3O) _2Co precursor microspheres self-assembled by nanosheets were synthesized by solvothermal method using cobalt acetate as raw material. After the precursor was calcined, flower-shaped porous Co_3O_4 microspheres with good morphology were obtained. The samples were characterized by XRD, FT-IR, TG, SEM, TEM and N 2 adsorption-desorption Phase, chemical composition, morphology and pore structure were characterized. The thermal decomposition of ammonium perchlorate (AP) catalyzed by Co_3O_4 flower microspheres was evaluated by differential scanning calorimetry (DSC). The results showed that flower-like Co 3 O 4 microspheres had good catalytic activity on the thermal decomposition of AP. The addition of 2% (mass fraction) Co 3 O 4 reduced the peak temperature of AP pyrolysis by 122 ℃ and the apparent decomposition heat by 422 J / g. Excellent performance due to its good dispersion and rich hierarchical pore structure.