高分散CeO2@C核壳材料催化2-取代苯并噻唑的合成研究

Highly Dispersed CeO2@C Core-shell Nanoparticles as Efficient Catalyst for Synthesis of 2-Substitutedbenzothiazoles

以木质素低聚物为前体,在氩气下600℃碳化制备了高度分散CeO2@C核壳材料催化剂,并对催化剂进行了X-射线衍射(XRD),拉曼光谱(Raman),透射电镜(TEM)表征,催化剂核壳结构的限域作用与较高的石墨化程度,提高了催化剂的稳定性和催化活性。研究了CeO2@C核壳材料催化剂在以纯O2为氧化剂下,由邻氨基苯硫酚和醛类缩合而得到2-取代苯并噻唑,通过单因素实验,确定了合成标题化合物的工艺条件,并获得良好的收率。

The highly dispersed CeO2@C core-shell nanoparticles was prepared by Lignin-based oligomer precursors under argon at 600℃.The catalysts were characterized by X-ray diffraction,transmission electron microscopy and Raman spectrum.The limited function of the catalyst core-shell structure and the higher degree of graphitization improve the stability and catalytic activity of the catalyst.Benzothiazole derivatives were obtained via o-aminothiophenol and aldehydes condensation by O2 as oxidation and CeO2@C core-shell nanoparticles as catalyst derivatives.The process conditions for the synthesis of the title compound were determined by a single factor experiment,and a good yield was obtained.