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Influencing factors and c atalytic characteristics of gold nanoparticles biosynthesized by the cell-free extracts of Trichoderma sp. WL-Go *(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2019 06
Page:
1-8
Research Field:
Articles
Publishing date:

Info

Title:
Influencing factors and c atalytic characteristics of gold nanoparticles biosynthesized by the cell-free extracts of Trichoderma sp. WL-Go *
Author(s):
YANG Jing1 LUAN Yunpeng1 LU Zhiyu1 BAI Jiandong1 ZHANG Hongbin 1 LI Xuanying1 MA Qiao2 & QU Yuanyuan1**
1 Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
2 BInstitute of Environmental Systems Biology, College of Environmental Science and Engineering, Dalian Maritime University, Dalian 116026, China
Keywords:
gold nanoparticle biosynthesis Trichoderma sp. 4-nitrophenol catalytic activity
CLC:
-
PACS:
DOI:
10.19675/j.cnki.1006-687x.2019.02031
DocumentCode:

Abstract:
In recent years, compared with physical or chemical synthesis methods, biosynthesis of gold nanoparticles ( AuNPs) has attracted wide attention due to its environmentally friendly nature, mild reaction conditions, and low toxicity effects. In this study, cell-free extracts of Trichoderma sp. WL-Go were used to synthesize AuNPs. The effects of concentration of chloroauric acid, pH and temperature for the biosynthesis process were investigated, and the catalytic ability for the reduction of 4-nitrophenol by as-synthesized AuNPs was also discussed. The results showed that the concentration of chlorometalic acid, pH and temperature had important effects on the synthesis of gold nanoparticles, which mainly reflected in the synthesis rate and the stability of AuNPs. The increase of temperature could accelerate the synthesis of process. TEM images showed that the average particle size of AuNPs synthesized at 30 °C and 60 °C was 15.0 nm and 15.1 nm respectively , which were both spherical and pseudo-spherical. According to the catalytic experiment results of 4-nitrophenol reduction, it is showed that the catalytic rate of AuNPs synthesized at 60 °C was higher than those at 30 °C. In conclusion, this study shows that the cell-free extracts of Trichoderma sp. WL-Go could synthesize AuNPs with good dispersion and uniform size . The increase of temperature can accelerate the synthesis of AuNPs and enhance their catalytic activity meanwhile , which has a positive significance for the industrial application of biosynthesized AuNPs.

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Last Update: 2019-04-26