Continuous-flow biosynthesis of Au–Ag bimetallic nanoparticles in a microreactor
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- 作者：Hongyu Liu ; Jiale Huang ; Daohua Sun…
- 关键词：Microfluidic ; Biosynthesis ; Bimetal ; C. Platycladi ; Nanoparticles
- 刊名：Journal of Nanoparticle Research
- 出版年：2014
- 出版时间：November 2014
- 年：2014
- 卷：16
- 期：11
- 全文大小：1,924 KB
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Jiale Huang (1) (2) (3)
Daohua Sun (1) (2) (3)
Tareque Odoom-Wubah (1) (2) (3)
Jun Li (1) (2) (3)
Qingbiao Li (1) (2) (3) (4)
1. Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, People’s Republic of China
2. National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Xiamen University, Xiamen, 361005, People’s Republic of China
3. Key Lab for Chemical Biology of Fujian Province, Xiamen University, Xiamen, 361005, People’s Republic of China
4. College of Chemistry and Life Science, Quanzhou Normal University, Quanzhou, 362000, People’s Republic of China - ISSN：1572-896X
文摘
Herein, a microfluidic biosynthesis of Au–Ag bimetallic nanoparticle (NP) in a tubular microreactor, based on simultaneous reduction of HAuCl4 and AgNO3 precursors in the presence of Cacumen Platycladi (C. Platycladi) extract was studied. The flow velocity profile was numerically analyzed with computational fluid dynamics. Au–Ag bimetallic NPs with Ag/Au molar ratios of 1:1 and 2:1 were synthesized, respectively. The alloy formation, morphology, structure, and size were investigated by UV–Vis spectra analysis, transmission electron microscopy (TEM), high resolution TEM, scanning TEM, and energy-dispersive X-ray analysis. In addition, the effects of volumetric flow rate, reaction temperature, and concentration of C. Platycladi extract and NaOH on the properties of the as-synthesized Au–Ag bimetallic NPs were investigated. The results indicated that these factors could not only affect the molar ratios of the two elements in the Au–Ag bimetallic NPs, but also affect particle size which can be adjusted from 3.3 to 5.6?nm. The process was very rapid and green, since a microreactor was employed with no additional synthetic reagents used. This work is anticipated to provide useful parameters for continuous-flow biosynthesis of bimetallic NPs in microreactors.