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Facile synthesis of SnO 2 shell followed by microwave treatment for high environmental stability of Ag nanoparticles.
- Source :
-
RSC advances [RSC Adv] 2020 Oct 23; Vol. 10 (63), pp. 38424-38436. Date of Electronic Publication: 2020 Oct 23 (Print Publication: 2020). - Publication Year :
- 2020
-
Abstract
- This study describes a new method for passivating Ag nanoparticles (AgNPs) with SnO <subscript>2</subscript> layer and their further treatment by microwave irradiation. The one-step process of SnO <subscript>2</subscript> layer formation was carried out by adding sodium stannate to the boiling aqueous AgNPs solution, which resulted in the formation of core@shell Ag@SnO <subscript>2</subscript> nanoparticles. The coating formation was a tunable process, making it possible to obtain an SnO <subscript>2</subscript> layer thickness in the range from 2 to 13 nm. The morphology, size, zeta-potential, and optical properties of the Ag@SnO <subscript>2</subscript> NPs were studied. The microwave irradiation significantly improved the environmental resistance of Ag@SnO <subscript>2</subscript> NPs, which remained stable in different biological solutions such as NaCl at 150 mM and 0.1 M, Tris-buffered saline buffer at 0.1 M, and phosphate buffer at pH 5.6, 7.0, and 8.0. Ag@SnO <subscript>2</subscript> NPs after microwave irradiation were also stable at biologically relevant pH values, both highly acidic (1.4) and alkaline (13.2). Moreover, AgNPs covered with a 13 nm-thick SnO <subscript>2</subscript> layer were resistant to cyanide up to 0.1 wt%. The microwave-treated SnO <subscript>2</subscript> shell can facilitate the introduction of AgNPs in various solutions and extend their potential application in biological environments by protecting the metal nanostructures from dissolution and aggregation.<br />Competing Interests: There are no conflicts to declare.<br /> (This journal is © The Royal Society of Chemistry.)
Details
- Language :
- English
- ISSN :
- 2046-2069
- Volume :
- 10
- Issue :
- 63
- Database :
- MEDLINE
- Journal :
- RSC advances
- Publication Type :
- Academic Journal
- Accession number :
- 35517546
- Full Text :
- https://doi.org/10.1039/d0ra06159j