文献类型：期刊文献

英文题名：Preparation of porous chitosan/reduced graphene oxide microspheres supported Pd nanoparticles catalysts for Heck coupling reactions

作者：Zheng, Xiu[1];Zhao, Jing[1];Xu, Mengdie[1];Zeng, Minfeng[1]

机构：[1]Shaoxing Univ, Coll Chem & Chem Engn, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Peoples R China

年份：2020

卷号：230

外文期刊名：CARBOHYDRATE POLYMERS

收录：SCI-EXPANDED(收录号：WOS:000504402300071)、、EI(收录号：20194807735703)、Scopus(收录号：2-s2.0-85075383246)、WOS

基金：This work is supported by the National Natural Science Foundation of China (Grant No. 11875193 and 11475114), Zhejiang Provincial Fundamental Public Welfare Research Project of China (Grant No. LGG18E030004).

语种：英文

外文关键词：Chitosan; Reduced graphene oxide; Palladium; Catalysis

外文摘要：Novel porous chitosan/reduced graphene oxide microspheres supported Pd nanoparticles catalysts (Pd@CS/RGO) were prepared by a combination of silica nanoparticles etching and freeze-drying treatments of CS/RGO/silica/PdCl2 composite microspheres. The microstructure of the Pd@CS/RGO microspheres catalysts have been investigated by X-ray photo electron spectroscopy (XPS), Raman spectroscopy, high resolution transmission electron microscopy (HR-TEM), thermo-gravimetric analysis (TGA), and X-ray diffraction (XRD), etc. The results revealed that the novel catalysts showed open porous structure; CS had good miscibility with RGO nanosheets; Pd nanoparticles were well incorporated within CS/RGO matrix; the thermal stabilities of the catalysts were improved significantly over CS. Meanwhile, the Pd@CS/RGO catalysts have been demonstrated as highly active and easily recyclable catalysts for Heck reactions. The preparation process is simple, and the structure and performance of the catalytic material can be governed by changing the mass ratios of CS/RGO/silica/PdCl2 and the pore-forming process conditions.