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Gold Nanoparticles Stabilized by poly(4-vinylpyridine) Grafted Cellulose Nanocrystals as Efficient and Recyclable Catalysts

Gold Nanoparticles Stabilized by poly(4-vinylpyridine) Grafted Cellulose Nanocrystals as Efficient and Recyclable Catalysts

Zhen Zhang, Gilles Sèbe, Xiaosong Wang, Kam C Tam

Carbohydr Polym. 2018 Feb 15;182:61-68.

PMID: 29279126

Abstract:

pH-responsive poly(4-vinylpyridine) (P4VP) grafted cellulose nanocrystals (P4VP-g-CNC) were prepared by Surface-Initiated Atom Transfer Radical Polymerization (SI-ATRP) and subsequently used to stabilize gold nanoparticles (Au NPs) as efficient and recyclable nanocatalysts for the reduction of 4-nitrophenol (4NP). The presence of P4VP brushes on the CNC surface controlled the growth of Au NPs yielding smaller averaged diameter compared to Au NPs deposited directly on pristine CNC. The catalytic performances of pristine Au NPs, Au@CNC and Au@P4VP-g-CNC were compared by measuring the turnover frequency (TOF) for the catalytic reduction of 4NP. Compared to pristine Au NPs, the catalytic activity of Au@CNC and Au@P4VP-g-CNC were 10 and 24 times better. Moreover, the Au@P4VP-g-CNC material could be recovered via flocculation at pH>5, and the recycled nanocatalyst remained highly active.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP25232411	Poly(4-vinylpyridine)		25232-41-1	Price

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