Aim and Objectives: The focus of the present work is to synthesize ZnO/C composite using dextrose as carbon source by combustion method and study the comparative evaluation on one-pot synthesis of β-acetamido- β-(phenyl) propiophenone over ZnO nanoparticles and ZnO/C composite catalyst.

Materials and Methods: The ZnO nanoparticles has been synthesized by sol-gel method using zinc nitrate and NaOH and ZnO/Carbon composites by combustion method using zinc nitrate and dextrose as carbon source. The resulting gel was placed in a preheated muffle furnace at 400oC. The solution boils and ignites with a flame. On cooling highly amorphous powder of ZnO/Carbon composite is obtained.

Results: The XRD patterns reveal the hexagonal phase with Wurtzite structure and the nanocrystalline nature of the catalysts. The SEM image of ZnO/C composite showed that it contains spherical particles with an average size of 41 nm. The average particle size of the composite was around 60nm by DLS method. The catalytic activity of the ZnO/Carbon composites has been analyzed by one-pot four-component condensation of benzaldehyde, acetophenone, acetyl chloride and acetonitrile. The feed molar ratio of 1:1 (Bz:AP) and catalyst loading of 30 mol% is found to be the optimal condition for β-acetamido ketone conversion over ZnO/carbon composite.

Conclusion: The substantial catalytic activity of the synthesized ZnO/C composite materials was tested by one-pot four-component condensation of benzaldehyde (Bz), acetophenone (AP), acetyl chloride (AC) and acetonitrile (AN) which showed a high β-acetamido ketone conversion under the optimized reaction conditions. It has also been found that the catalyst is very stable and reusable.

目的与目的：本工作的重点是通过燃烧法合成以葡萄糖为碳源的 ZnO/C 复合材料，并研究一锅法合成 β-乙酰氨基-β-（苯基）苯丙酮与 ZnO 纳米颗粒和ZnO/C复合催化剂。

材料和方法： ZnO 纳米颗粒已通过溶胶-凝胶法使用硝酸锌和 NaOH 合成，以及使用燃烧法使用硝酸锌和葡萄糖作为碳源合成 ZnO/碳复合材料。将所得凝胶置于预热至 400℃的马弗炉中。溶液沸腾并用火焰点燃。冷却后得到高度非晶态的 ZnO/碳复合材料粉末。

结果：XRD图谱揭示了具有纤锌矿结构的六方相和催化剂的纳米晶体性质。ZnO/C 复合材料的 SEM 图像表明它含有平均尺寸为 41 nm 的球形颗粒。通过DLS方法，复合材料的平均粒径在60nm左右。通过苯甲醛、苯乙酮、乙酰氯和乙腈的一锅四组分缩合分析了ZnO/Carbon复合材料的催化活性。发现 1:1 (Bz:AP) 的进料摩尔比和 30 mol% 的催化剂负载是 β-乙酰胺酮在 ZnO/碳复合材料上转化的最佳条件。

结论：通过苯甲醛(Bz)、苯乙酮(AP)、乙酰氯(AC)和乙腈(AN)的一锅四组分缩合测试合成的ZnO/C复合材料的显着催化活性，显示出高β -乙酰胺酮在优化反应条件下的转化率。还发现该催化剂非常稳定且可重复使用。