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Open AccessArticle

Study of Green Synthesis of Ultrasmall Gold Nanoparticles Using Citrus Sinensis Peel

Shaanxi Oil and Gas Pollution Control and Reservoir Protection Key Laboratory, Xi’an Shiyou University, Xi’an 710065, Shaanxi, China
State Key Laboratory of Petroleum and Petrochemical Pollution Control and Treatment, Beijing 102206, China
Department of Mechanical and Aerospace Engineering, University of Missouri-Columbia, Columbia, MO 65211, USA
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(12), 2423;
Received: 8 May 2019 / Revised: 31 May 2019 / Accepted: 3 June 2019 / Published: 14 June 2019
(This article belongs to the Section Chemistry)
Sweet orange (Citrus sinensis) peel, one of the most underutilized biowaste, was in this study employed for the green synthesis of gold nanoparticles (AuNPs) as an alternative source of reductant and stabilizer. Spherical AuNPs with narrow size distribution (1.75 ± 0.86 nm) were obtained by controlling pH and adjusting sequence for the first time. ultraviolet-visible (UV-vis) spectrophotometer, transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS), dynamic light scattering (DLS) were applied to detect the characteristic surface plasmon resonance peak, morphological and aggregate characteristic, elementary composition and hydrodynamic diameter, respectively. The major functional groups in extract were tested by Fourier transform infrared(FT-IR) spectrophotometer to characterize the components which are responsible for the reduction and stabilization of AuNPs. The possible role of the components during the process of AuNPs synthesis is also discussed. The result of this study enriched the green source for ultra-small AuNPs synthesis, and will help to understand the mechanism of synthesis and stability of ultra-small AuNPs by fruit peels extract. View Full-Text
Keywords: biowaste; green synthesis; gold nanoparticles; functional groups; mechanism biowaste; green synthesis; gold nanoparticles; functional groups; mechanism
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Yang, B.; Qi, F.; Tan, J.; Yu, T.; Qu, C. Study of Green Synthesis of Ultrasmall Gold Nanoparticles Using Citrus Sinensis Peel. Appl. Sci. 2019, 9, 2423.

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