1. Impact of polymeric stabilizers on the transformation and sustainable recovery of silver microstructures from spent button batteries.
- Author
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Muankhajorn, Natsuda, Ekgasit, Sanong, and Wongravee, Kanet
- Subjects
SILVER ,MICROSTRUCTURE ,X-ray diffraction ,SILVER clusters ,STORAGE batteries ,MOLECULAR weights - Abstract
[Display omitted] • A rapid and environmentally friendly method for recovering silver microstructures from spent button batteries. • The role of polymeric stabilizers in controlling the growth and morphology of silver microstructures. • The Molecular weight of stabilizers significantly affects the shape and uniformity of silver microstructures. • Chemical conditions for the silver recovery in highly pure silver microplates and microspheres. This paper presents a simple, rapid, highly efficient, and environmentally friendly technique for recovering silver microstructures from spent button batteries. The technique exploits the reducing ability of H 2 O 2 to convert silver sources into high-purity silver at the microscopic scale. The influence of polymeric stabilizers (PVP and PVA) on the formation of silver microstructures was elucidated. The results revealed that polymeric stabilizers play a crucial role in controlling the growth of silver particles at the microscopic level. Specifically, PVP affords a homogeneous silver microplate, whereas PVA facilitates the formation of isotropic spherical microparticles. Additionally, the effect of the molecular weight (Mw) of the stabilizers on the silver particles was examined. The Mw of PVP significantly impacts its anti-aggregation properties. Similarly, the Mw of PVA affects the formation of silver microstructures. The high purity of the recovered silver microstructures was verified by EDX and XRD. Finally, the optimal recovery conditions involving 360,000 and 150,000 g/mol for PVP and PVA, respectively with 0.5 % w/v) were implemented to recover silver from button batteries. These battery residues were successfully transformed into highly pure silver microplates and microspheres using those respective polymeric stabilizers. The developed synthesis approach will facilitate the sustainable recovery of silver from spent button batteries, addressing the environmental, and resource challenges associated with battery waste. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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