Facile synthesis of SnO₂shell followed by microwave treatment for high environmental stability of Ag nanoparticles

Abstract

This study describes a new method for passivating Ag nanoparticles (AgNPs) with SnO2 layer and their further treatment by microwave irradiation.

Core/Shell Ag/SnO2 Nanowires for Visible Light Photocatalysis

“…In this reaction, the pure SnO2 nanoparticles (SnO2NPs) were prepared that were similar in morphology and structure to the SnO2 shell (Figure 1b). The nanoparticles revealed a mean diameter of about 25 nm (STEM analysis) and their properties were described in our previous report [16]. The absorbance spectra of SnO2NPs shows the band with the maximum at 195 nm (Figure S2) that was suitable for photocatalysis induced by UV light.…”

“…For these purposes, SnO 2 was synthesized using stannate precursor as in the case of the shell but without AgNWs presence. The process resulted in SnO 2 nanoparticles (SnO 2 NPs) formation, described in our previous report [16]. To compare the influence of SnO 2 on the photocatalytic activity the Ag/SnO 2 NWs, SnO 2 NPs were added to the dye solution at the concentration of the whole core/shell complex (2 mg/mL) and at the concentration of the tin oxide in the shell (0.66 mg/mL) (Figure 3b).…”

“…The core/shell Ag/SnO 2 NWs were dispersed homogeneously in an aqueous solution of rhodamine B. The shell formation prevented the nanowires from the aggregation process because SnO 2 is an efficient inorganic stabilizer of silver colloidal suspensions [16]. This phenomenon allows AgNWs introduction to the hydrophilic environment without aggregation and acting as a part of efficient photocatalyst as well as can also facilitate the redispersion process of Ag/SnO 2 NWs after sedimentation.…”

“…As a result, the SnO 2 nanoparticles (SnO 2 NPs) were synthesized. Their morphology and structure were described in our previous work [16].…”

A SnO2 shell for high environmental stability of Ag nanowires applied for thermal management

“…13 One of the promising non-organic coating material is tin oxide (SnO 2 ), which shows high mechanical, thermal, and chemical stability and can be applied as a protective shell for silver nanostructures. [14][15][16] AgNWs were decorated with SnO 2 nanoparticles to obtain thermal stability and to minimise the annealing procedures and post-treatment of silver nanowires. 17 SnO 2 layer, as an anti-corrosion coating for Ag nanowires protection, has been previously presented only in the form of a monolayer, which was grown in solution overnight under the treatment of stannous uoride (SnF 2 ), additionally covered with amorphous carbon layer.…”