Journal
CARBOHYDRATE POLYMERS
Volume 140, Issue -, Pages 66-73Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2015.12.049
Keywords
One-pot; Green synthesis; Cellulose nanocrystals; Polyethylene glycol; Gold nanoparticles; 4-Nitrophenol
Categories
Funding
- National Natural Science Foundation of China [11202124]
- Doctoral Fund of Ministry of Education [20113108120019]
- Shanghai Municipal Science and Technology Commission [13DZ229210-0]
- Baoshan District Science and Technology Commission of Shanghai [bkw2013142]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
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The emphasis of science and technology shifts toward environmentally friendly and sustainable resources and processes. Herein, we report a facile, one-pot and green synthesis of biomaterial-supported gold nanoparticles (AuNPs) with superior catalytic activity. Cellulose nanocrystal (CNC)-supported AuNPs were prepared by heating the aqueous mixture of HAuC14, CNCs and polyethylene glycol, avoiding toxic chemicals, extreme condition and complicated procedure. The resultant CNC-supported AuNPs exhibited catalytic activities for the reduction of 4-nitrophenol by sodium borohydride. The maximum apparent rate constant reached 1.47 x 10(-2) s(-1), and the turnover frequency reached 641 h(-1). The superior catalytic performance can be ascribed to the large amount of highly dispersed AuNPs with few nanometers in size which are loaded on CNCs. About 90% of the AuNPs are smaller than 10 nm, and nearly 60% of the AuNPs are smaller than 5 nm. The synthesis is eco-friendly, facile and low-cost, thus has great potential for industrial and medical applications. (C) 2015 Elsevier Ltd. All rights reserved.
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