catalyst was increased. The catalyst was characterized by XRD, SEM, EDS, TEM and BET surface area analysis. The catalytic activity of Co/Ca–Al2O3 was investigated in the synthesis of 4H-pyrans. The Co/Ca–Al2O3 showed better catalytic activity than Al2O3 and Co/Al2O3. The catalyst can be recycled and reused without a significant structural change or considerable decrease in its activity. Graphic abstract
摘要 在这项研究中,通过共沉淀法合成了Co / Ca–Al 2 O 3复合材料作为非均相纳米催化剂。研究了添加Ca对结构性能和催化活性的影响。结果表明,Ca的加入影响了催化剂的比表面积和粒径,提高了Co / Al 2 O 3氧化物催化剂的催化活性。通过XRD,
SEM,EDS,
TEM和BET表面积分析对催化剂进行了表征。在合成
4H-吡喃中研究了Co / Ca–Al 2 O 3的催化活性。Co / Ca–Al 2 O 3表现出比Al 2 O 3和Co / Al 2 O 3更好的催化活性。催化剂可以再循环和再利用,而不会发生明显的结构变化或活性显着降低。 图形摘要