6533b839fe1ef96bd12a65c2

RESEARCH PRODUCT

Gold recycling at laboratory scale: from nanowaste to nanospheres

Carolina S. GarcíaPaula C. AngeloméVíctor OestreicherVíctor OestreicherGalo J. A. A. Soler-illia

subject

Materials scienceGeneral Chemical EngineeringNanotechnology02 engineering and technologyNANOWASTELaboratory scaleReuse010402 general chemistry01 natural sciencesRECYCLING CYCLENanomaterialsRecovery method//purl.org/becyt/ford/2.10 [https]Environmental ChemistryGeneral Materials ScienceGREEN CHEMISTRYAqueous solution021001 nanoscience & nanotechnology0104 chemical sciencesGeneral Energy//purl.org/becyt/ford/2 [https]Colloidal goldReagentSUSTAINABLE CHEMISTRYGOLD NANOPARTICLES0210 nano-technology

description

The market for products based on nanotechnology, and with it the use of nanomaterials and the generation of nanowaste, increases day by day. Among the vast variety of nanomaterials available, gold nanoparticles (AuNPs) are among the most studied and applied in commercial products. This current situation requires both the development of recovery methods to reduce the amount of nanowaste produced, and new synthetic methods that allow the reuse of recovered gold for new nanomaterial production, keeping in mind both economical and ecological considerations. In this work, a methodology to recover gold from aqueous laboratory nanowaste and transform it into an aqueous HAuCl4 solution was developed, using extremely simple procedures and readily available chemical reagents (NaCl, HCl, H2O2) and allowing the recovery of more than 99 % of the original gold. The experiments were performed by using both simulated and real laboratory nanowastes, and practically the same results were obtained. Moreover, the subsequent use of the obtained aqueous HAuCl4 solution from the recovered gold to produce spherical AuNPs through a seed-mediated approach was demonstrated. Thus, this work presents for the first time a complete recycling cycle from nanowaste to the reagent and back to the nanomaterial. Fil: Oestreicher, Víctor Santiago Jesús. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad Nacional de San Martin. Instituto de Nanosistemas; Argentina Fil: García, Carolina S.. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina Fil: Soler Illia, Galo Juan de Avila Arturo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martin. Instituto de Nanosistemas; Argentina Fil: Angelome, Paula Cecilia. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Oficina de Coordinacion Administrativa Ciudad Universitaria. Unidad Ejecutora Instituto de Nanociencia y Nanotecnologia. Unidad Ejecutora Instituto de Nanociencia y Nanotecnologia - Nodo Constituyentes | Comision Nacional de Energia Atomica. Unidad Ejecutora Instituto de Nanociencia y Nanotecnologia. Unidad Ejecutora Instituto de Nanociencia y Nanotecnologia - Nodo Constituyentes.; Argentina

yearjournalcountryeditionlanguage
2019-10-16
10.1002/cssc.201901488https://onlinelibrary.wiley.com/doi/abs/10.1002/cssc.201901488