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

Xiu Zheng; Jing Zhao; Mengdie Xu; Minfeng Zeng

doi:10.1016/j.carbpol.2019.115583

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

Carbohydr Polym. 2020 Feb 15:230:115583. doi: 10.1016/j.carbpol.2019.115583. Epub 2019 Nov 7.

Authors

Xiu Zheng¹, Jing Zhao¹, Mengdie Xu¹, Minfeng Zeng²

Affiliations

¹ Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China.
² Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, College of Chemistry and Chemical Engineering, Shaoxing University, Shaoxing 312000, China. Electronic address: zengmf@usx.edu.cn.

PMID: 31887932
DOI: 10.1016/j.carbpol.2019.115583

Abstract

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.

Keywords: Catalysis; Chitosan; Palladium; Reduced graphene oxide.