Projekteja vuodessa
Abstrakti
This study investigates the sustainable preparation of Ag/Zn alloys from a simulated zinc process solution (20 ppm Ag, 65 g/L Zn, and 10 g/L H2SO4) via electrodeposition-redox replacement (EDRR) and the electrochemical dealloying behavior of the Ag/Zn alloys. Results indicate that Ag/Zn deposits with diverse compositions and microstructures can be obtained at room temperature without any complexing agents, simply by varying EDRR parameters like deposition time,
deposition potential, and redox replacement time. Two types of Ag/Zn intermetallics (Zn0.96Ag0.04 and Ag0.76Zn0.24) were identified by the combination of X-ray diffraction (XRD) and anodic linear sweep voltammetry. Mass-transfer limitations have significant effects on the growth process, and a nucleation-growth mechanism from Ag/Zn particles into dendrites with increased EDRR cycles is introduced: with EDRR parameters favoring mass-transfer limitations (higher overpotentials, longer deposition times, and shorter redox replacement times), a more dendritic morphology of Ag/Zn alloys is achieved. The selective dissolution of Zn (i.e. dealloying) allowed the formation of silver-rich surfaces with an enhanced surface plasmon resonance behavior, which can be readily tuned by EDRR and dealloying parameters. These results highlight the significant potential of the EDRR-dealloying route to produce different types of Ag/Zn alloys and optically functional materials directly from
base metal process solutions.
deposition potential, and redox replacement time. Two types of Ag/Zn intermetallics (Zn0.96Ag0.04 and Ag0.76Zn0.24) were identified by the combination of X-ray diffraction (XRD) and anodic linear sweep voltammetry. Mass-transfer limitations have significant effects on the growth process, and a nucleation-growth mechanism from Ag/Zn particles into dendrites with increased EDRR cycles is introduced: with EDRR parameters favoring mass-transfer limitations (higher overpotentials, longer deposition times, and shorter redox replacement times), a more dendritic morphology of Ag/Zn alloys is achieved. The selective dissolution of Zn (i.e. dealloying) allowed the formation of silver-rich surfaces with an enhanced surface plasmon resonance behavior, which can be readily tuned by EDRR and dealloying parameters. These results highlight the significant potential of the EDRR-dealloying route to produce different types of Ag/Zn alloys and optically functional materials directly from
base metal process solutions.
Alkuperäiskieli | Englanti |
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Sivut | 3716–3725 |
Sivumäärä | 10 |
Julkaisu | ACS Sustainable Chemistry and Engineering |
Vuosikerta | 10 |
Numero | 11 |
Varhainen verkossa julkaisun päivämäärä | 7 maalisk. 2022 |
DOI - pysyväislinkit | |
Tila | Julkaistu - 21 maalisk. 2022 |
OKM-julkaisutyyppi | A1 Julkaistu artikkeli, soviteltu |
Sormenjälki
Sukella tutkimusaiheisiin 'Electrochemical Growth of Ag/Zn Alloys from Zinc Process Solutions and Their Dealloying Behavior'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.-
EARMetal, Hydro: Electrochemically Assisted Aqueous Reduction of Waste Streams for Metals Recovery and Functional Surfaces
Lundström, M., Herrala, R., Cui, L., Yliniemi, K. & Wang, Z.
01/09/2021 → 31/08/2025
Projekti: Academy of Finland: Other research funding
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GoldTail: Kultapitoisten rikastushiekkojen kestävä hyödyntäminen (GoldTail)
Lundström, M., Yliniemi, K., Halli, P., Karppinen, A., Revitzer, H., Wilson, B., Seisko, S., Sahlman, M. & Wang, Z.
01/10/2018 → 30/09/2021
Projekti: Academy of Finland: Other research funding
Laitteet
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Raaka-aineiden tutkimusinfrastruktuuri
Maarit Karppinen (Manager)
Kemian tekniikan korkeakouluLaitteistot/tilat: Facility