期刊
BIOTECHNOLOGY LETTERS
卷 38, 期 9, 页码 1503-1508出版社
SPRINGER
DOI: 10.1007/s10529-016-2120-5
关键词
Biosynthesis; Catalyst; Gold nanoparticles; Nitroaromatics; Trichosporon montevideense
资金
- National Natural Science Foundation of China [51508068]
- Program for New Century Excellent Talents in University [NCET-13-0077]
- Fundamental Research Funds for the Central Universities [DUT14YQ107]
- Open Project of State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [ESK201529]
To investigate green synthesis of gold nanoparticles (AuNPs) by Trichosporon montevideense, and to study their reduction of nitroaromatics. AuNPs had a characteristic absorption maximum at 535 nm. Scanning electron microscopy images revealed that the biosynthesized nanoparticles were attached on the cell surface. X-ray diffraction analysis indicated that the particles formed as face-centered cubic (111)-oriented crystals. The average size of AuNPs decreased from 53 to 12 nm with increasing biomass concentration. The catalytic reduction of 2-nitrophenol, 3-nitrophenol, 4-nitrophenol, o-nitrophenylamine and m-nitrophenylamine (0.1 mM) by NaBH4 had reaction rate constants of 0.32, 0.44, 0.09, 0.24 and 0.39 min(-1) with addition of 1.45 x 10(-2) mM AuNPs. An eco-friendly approach for synthesis of AuNPs by T. montevideense is reported for the first time. The biogenic AuNPs could serve as efficient catalysts for hydrogenation of various nitroaromatics.
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