NDLI: Chemical synthesis of gold nanoparticles with different morphology from a secondary source

Content Provider	Springer Nature Link
Author	Abkenar, A. Koochaki Naderi, M.
Copyright Year	2016
Abstract	Nowadays, the conversion of waste materials into advanced material is taken into much consideration. The present paper attempts to investigate the chemical synthesis of gold nanoparticles from copper anode slime (containing 0.1 % Au) that is an insoluble product deposited at the bottom of the electrorefining tank during electrorefining of copper. First, the anode slime was washed by nitric acid. To separate gold from anode slime, it was dissolved by thiourea solution as a selective extraction of gold; a cationic complex of gold-thiourea was then obtained and used as the gold solution. The gold nanoparticles were synthesized directly from gold-thiourea solution by two different reducing agents sodium citrate and VenMet solution, the latter being a mixture of sodium borohydride and sodium hydroxide. These reductants play the role of both a reducing and capping agent for synthesis at different temperatures (25–65 °C) and different agitation rates (400, 800, 1200 rpm). X-ray fluorescence and atomic absorption spectroscopy showed the chemical composition of the anode slime and gold-thiourea solution. The scanning electron microscopy and transmission electron microscopy images showed various shapes, including spherical and cubic nanoparticles of an average size of about 190–500 nm for sodium citrate reduction, and 15–190 nm for reduction by VenMet solution at different temperatures and agitation rates. Furthermore, energy-dispersive X-ray and X-ray diffraction pattern illustrated that gold crystal was formed. Dynamic light scattering measurements were performed to investigate the average particle size and particle size distribution.
Starting Page	2173
Ending Page	2184
Page Count	12
File Format	PDF
ISSN	1735207X
Journal	Journal of the Iranian Chemical Society
Volume Number	13
Issue Number	12
e-ISSN	17352428
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-07-18
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Analytical Chemistry Physical Chemistry Gold nanoparticles Copper anode slime Thiourea Biochemistry Inorganic Chemistry Gold secondary source Organic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry

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