Advance in ultrasonic spray pyrolysis (USP) for the synthesis of gold nanoparticles

Introduction/purpose: Ultrasonic spray pyrolysis (USP) is usually used for the preparation of submicronic and nanosized gold powders. This is a simple method for a synthesis from an aerosol containing dissolved metallic salts such as gold chloride, gold nitrate, and gold-acetate, obtained in the...

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Autores principales:	Srećko R. Stopić, Bernd G. Friedrich
Formato:	article
Lenguaje:	EN
Publicado:	University of Defence in Belgrade 2020
Materias:	gold advancement ultrasonic spray pyroylsis synthesis Military Science U Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/6a2e248d87054eec8af27ad99a211224
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spelling	oai:doaj.org-article:6a2e248d87054eec8af27ad99a2112242021-12-02T12:10:01ZAdvance in ultrasonic spray pyrolysis (USP) for the synthesis of gold nanoparticles10.5937/vojtehg68-279480042-84692217-4753https://doaj.org/article/6a2e248d87054eec8af27ad99a2112242020-10-01T00:00:00Zhttps://scindeks-clanci.ceon.rs/data/pdf/0042-8469/2020/0042-84692004877S.pdfhttps://doaj.org/toc/0042-8469https://doaj.org/toc/2217-4753Introduction/purpose: Ultrasonic spray pyrolysis (USP) is usually used for the preparation of submicronic and nanosized gold powders. This is a simple method for a synthesis from an aerosol containing dissolved metallic salts such as gold chloride, gold nitrate, and gold-acetate, obtained in the ultrasonic field using frequencies ranging from 0.8 to 2.5 MHz. Methods: The USP method combines aerosol formation in an ultrasonic field, transport of an aerosol with a carrier gas to the reactor and final reduction of HAuCl4 with a used gas such as hydrogen and carbon monoxide. The thermal decomposition of gold acetate takes place in a neutral atmosphere such as nitrogen and argon at elevated temperatures. The chemical reduction of HAuCl4 takes place in the aqueous phase using sodium citrate and sodium boride after heating water solution. Results: Powders of gold were obtained at room temperature using hydrogen reduction in an ultrasonic field at room temperature from HAuCl4 using a frequency of 0.8 MHz. The obtained gold particles were analysed using scanning electron microscopy (SEM) and energy disperse spectroscopy (EDS). The formed particles are round and agglomerated. An increase in temperature to 260°C and 500°C leads to the formation of spherical and cylindrical gold particles. Conclusion: New improved equipment for an ultrasonic spray pyrolysis synthesis of gold powder from HAuCl4 with hydrogen reduction was offered by PRIZMA, Kragujevac, Serbia, enabling a controlled reduction process with better prevention of piezo transducers in an ultrasonic field and increased aerosol production and its transport to the reaction furnace. Srećko R. Stopić Bernd G. FriedrichUniversity of Defence in Belgradearticlegoldadvancementultrasonic spray pyroylsissynthesisMilitary ScienceUEngineering (General). Civil engineering (General)TA1-2040ENVojnotehnički Glasnik, Vol 68, Iss 4, Pp 877-894 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	gold advancement ultrasonic spray pyroylsis synthesis Military Science U Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	gold advancement ultrasonic spray pyroylsis synthesis Military Science U Engineering (General). Civil engineering (General) TA1-2040 Srećko R. Stopić Bernd G. Friedrich Advance in ultrasonic spray pyrolysis (USP) for the synthesis of gold nanoparticles
description	Introduction/purpose: Ultrasonic spray pyrolysis (USP) is usually used for the preparation of submicronic and nanosized gold powders. This is a simple method for a synthesis from an aerosol containing dissolved metallic salts such as gold chloride, gold nitrate, and gold-acetate, obtained in the ultrasonic field using frequencies ranging from 0.8 to 2.5 MHz. Methods: The USP method combines aerosol formation in an ultrasonic field, transport of an aerosol with a carrier gas to the reactor and final reduction of HAuCl4 with a used gas such as hydrogen and carbon monoxide. The thermal decomposition of gold acetate takes place in a neutral atmosphere such as nitrogen and argon at elevated temperatures. The chemical reduction of HAuCl4 takes place in the aqueous phase using sodium citrate and sodium boride after heating water solution. Results: Powders of gold were obtained at room temperature using hydrogen reduction in an ultrasonic field at room temperature from HAuCl4 using a frequency of 0.8 MHz. The obtained gold particles were analysed using scanning electron microscopy (SEM) and energy disperse spectroscopy (EDS). The formed particles are round and agglomerated. An increase in temperature to 260°C and 500°C leads to the formation of spherical and cylindrical gold particles. Conclusion: New improved equipment for an ultrasonic spray pyrolysis synthesis of gold powder from HAuCl4 with hydrogen reduction was offered by PRIZMA, Kragujevac, Serbia, enabling a controlled reduction process with better prevention of piezo transducers in an ultrasonic field and increased aerosol production and its transport to the reaction furnace.
format	article
author	Srećko R. Stopić Bernd G. Friedrich
author_facet	Srećko R. Stopić Bernd G. Friedrich
author_sort	Srećko R. Stopić
title	Advance in ultrasonic spray pyrolysis (USP) for the synthesis of gold nanoparticles
title_short	Advance in ultrasonic spray pyrolysis (USP) for the synthesis of gold nanoparticles
title_full	Advance in ultrasonic spray pyrolysis (USP) for the synthesis of gold nanoparticles
title_fullStr	Advance in ultrasonic spray pyrolysis (USP) for the synthesis of gold nanoparticles
title_full_unstemmed	Advance in ultrasonic spray pyrolysis (USP) for the synthesis of gold nanoparticles
title_sort	advance in ultrasonic spray pyrolysis (usp) for the synthesis of gold nanoparticles
publisher	University of Defence in Belgrade
publishDate	2020
url	https://doaj.org/article/6a2e248d87054eec8af27ad99a211224
work_keys_str_mv	AT sreckorstopic advanceinultrasonicspraypyrolysisuspforthesynthesisofgoldnanoparticles AT berndgfriedrich advanceinultrasonicspraypyrolysisuspforthesynthesisofgoldnanoparticles
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Advance in ultrasonic spray pyrolysis (USP) for the synthesis of gold nanoparticles

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