One-Step Green Synthesis of Gold Nanoparticles Using Black Cardamom and Effect of pH on Its Synthesis

Nanoscale Research Letters
Ashwani Kumar Singh, O N Srivastava

Abstract

In the present article, an effective, one-step, and environmentally benign protocol for the synthesis of gold nanoparticles has been discussed. The black cardamom extract is used as a reducing agent for HAuCl4.3H2O. In order to synthesize gold nanoparticles, an aqueous solution of HAuCl4.3H2O was mixed with an optimized concentration of black cardamom extract where 1,8-cineole is the dominant component. Choosing black cardamom extract as a reducing agent can be justified under the light of the fact that it has a very fast reducing ability. Gold nanoparticles with different shapes and sizes were synthesized by varying the ratio of AuCl4 ions to black cardamom extract. Kinetics of reactions has been evaluated through monitoring of surface plasmon behavior of gold nanoparticles as a function of time. Based on Fourier transform infrared spectroscopy (FTIR) studies, a tentative mechanism of reduction of Au nanoparticles has also been proposed which includes oxidation of 1,8-cineole to 2-oxo-1,8-cineole. Further, a comprehensive study to investigate the effect of pH on the synthesis of Au nanoparticles has been carried out.

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Citations

Oct 28, 2019·Nanoscale Research Letters·Ericka Rodríguez-LeónRamón A Iñiguez-Palomares
Jun 28, 2018·Environmental Science and Pollution Research International·Stanisław WacławekMiroslav Černík
Apr 26, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·M A Abu-SaiedMahmoud Moustafa
Sep 1, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Farah Asilah AzriNuzul Noorahya Jambari
May 17, 2021·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Raha SoltaniNaser Farrokhi
Jun 3, 2021·Materials·Sean DrummerMahabubur Chowdhury
Jul 23, 2021·Nanoscale Research Letters·Jesús Mauro Adolfo Villalobos-NoriegaRamón A Iñiguez-Palomares

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