Oriented immobilization of Au nanoparticles on C@P4VP core–shell microspheres and their catalytic performance. (12th February 2015)

• Record Type: Journal Article
• Authors: Li, Jie; Huang, Zeting; Yang, Mu; Tan, Li; Zhang, Xiaowei; Gao, Hongyi; Tang, Yinhai; Ma, Qianqian; Wang, Ge
• Is Part Of: New journal of chemistry. Volume 39:Number 4(2015:Apr.)
• Page Start: 2949
• Page End: 2955
• Publication Date: 2015-02-12
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c4nj02112f
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A highly efficient inorganic–organic hybrid catalyst C@P4VP–Au is synthesized by the seeded emulsion polymerization and immobilization process. Abstract : Core–shell C@poly(4-vinylpyridine) (C@P4VP) microspheres immobilized with small and uniform Au nanoparticles were designed and fabricated. Firstly, the C@P4VP support was obtained by coating a poly(4-vinylpyridine) shell on the carbon spheres through the hydrogen-bond interaction between –COOH of carbon spheres and pyridine of 4-vinylpyridine. Then Au nanoparticles were synthesized by in situ adsorption and reduction of HAuCl4 in the P4VP chains of the C@P4VP microspheres. Carbon spheres can serve as hard templates and prevent the polymeric P4VP shell from excessive deformation. The coordination between cross-linked networks of P4VP chains and the embedded Au nanoparticles effectively inhibit the aggregation and leaching of noble metal nanoparticles from the support. The resulting C@P4VP–Au microspheres showed excellent catalytic performance and high cyclic stability in the aqueous reduction of 4-nitrophenol by NaBH4 . Moreover, optimal activities were observed for the P4VP shell with a low cross-linked degree and a reaction system with a low pH value.