Green Electrodeposition of Nano Gold from Benign Solution of HAuCl4.4H2O in Alum: Urea Deep Eutectic Solvent

Document Type : Original Article

Authors

1 Chemistry Department, College of Science, Al-Nahrain University, P.O.B.64055,Jadria, Baghdad, Iraq.

2 Chemistry Department, College of Science, Al-Nahrain University, P.O.B.64055,Jadria, Baghdad, Iraq

3 chemistry department,college of science, Al-Nahrain university, Baghdad, Iraq

Abstract

Deep Eutectic Solvents (DES) have demonstrated enormous potential in the electrodeposition of various materials, including metals and alloys. Usually, gold electroplating solution consists of toxic material of gold cyano compounds. This work demonstrates novel green electroplating of nanogold from Alum: Urea deep eutectic solvent (DES) containing chloro-gold compound (HAuCl4.4H2O). Gold showed one stage redox system in this reduction solution at -0.2V and oxidation and oxidation maximum at -0.3V. The electroplated gold on brass at -0.7V for one and three hours gave a brown-colored layer containing nanogold particles with an average distribution of (31.16-33.44) nm. The crystalline structure of deposited gold is like a cubic crystal with 10 nm size. This work was followed by scanning electron microscopy (Fe-SEM), Atomic Force Microscopy (AFM), Energy Dispersive X-ray analysis (EDX), and X-ray diffraction (XRD).

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Egyptian Journal of Chemistry
Volume 65, Issue 132 - Serial Number 13
Special Issue: Chemistry and Global Challenges (Part B)
December 2022
Pages 387-393

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History

  • Receive Date: 18 March 2022
  • Revise Date: 14 December 2022
  • Accept Date: 06 April 2022

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