期刊
CARBOHYDRATE POLYMERS
卷 140, 期 -, 页码 66-73出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2015.12.049
关键词
One-pot; Green synthesis; Cellulose nanocrystals; Polyethylene glycol; Gold nanoparticles; 4-Nitrophenol
资金
- 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
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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