Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/29471
ชื่อเรื่อง: Nanocrystalline Ag-C Composites Containing a Hexagonal Diamond Structure to Inhibit Tarnishing of Sterling Silver
ผู้แต่ง: Hongrutai N.
Nganglumpoon R.
Watmanee S.
Pinthong P.
Szilágyi P.A.
Wongpreedee K.
Panpranot J.
Keywords: Ag−C composite
antitarnish
electrochemical reduction
hexagonal diamond
nanocrystalline
วันที่เผยแพร่: 2023
สำนักพิมพ์: American Chemical Society
บทคัดย่อ: Three-dimensional nanocrystalline Ag-C composites containing a hexagonal diamond structure were produced by electrochemical reduction of acetic acid and electrodeposition of Ag(NO3) (0.01 M) at −1.1 V vs Ag/AgCl at ambient conditions. After applying the negative potential, an ultrathin layer of Ag (<0.1 μm) was first deposited, and subsequently, competitive electrodeposition of Ag and electroreduction of acetic acid resulted in the formation of nanocrystalline Ag-C products on the electrodes. A combination of microscopic, structural, and spectroscopic characterization results reveals that the nanocrystalline Ag-C contains a hexagonal diamond structure with an average crystallite size of 26 nm. The nanodiamond phase remained unchanged throughout 15-140 min reaction time. However, increasing the reaction time, the thickness of nanocrystalline Ag-C films increased to ∼2 μm with some large polyhedra carbon structures. The nanocrystalline Ag-C composites were utilized in the casting process of sterling silver to enhance its antitarnish properties. The antitarnishing of sterling silver upon exposure to a H2S environment was significantly improved by 50% with 0.005 wt % loading of the Ag-C composite. © 2023 American Chemical Society.
URI: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85173128105&doi=10.1021%2facsanm.3c03195&partnerID=40&md5=33cf32a47785bff0e78dbd4558fa4d49
https://ir.swu.ac.th/jspui/handle/123456789/29471
Appears in Collections:Scopus 2023

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