Formation and evolution of nanoporous bimetallic Ag-Cu alloy by electrochemically dealloying Mg-(Ag-Cu)-Y metallic glass

Li, Ran; Wu, Na; Liu, Jijuan; Yu, Jin; Chen, Xiaobo; Zhang, Tao

doi:10.1016/j.corsci.2017.02.017

Cited by 37 publications

(7 citation statements)

References 62 publications

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“…As is known, the chemical activity of metal elements is different, which has been regarded as the theoretical basis of dealloying [21]. In Mg-based and Ca-based MG, Mg and Ca are dissolved first, and other inactive elements, such as Cu, Y and Ag, are remained and formed into nanoporous materials [22]. Likewise, the order of the chemically active properties of the metal elements Mg, Zn and Ca is Ca > Mg > Zn.…”

Section: Discussionmentioning

confidence: 99%

Rapid Degradation of Azo Dyes by Melt-Spun Mg-Zn-Ca Metallic Glass in Artificial Seawater

Chen

et al. 2017

Metals

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Mg-Zn-Ca metallic glass (MG) is effective for degrading azo dyes; however, the related surface evolution and degradation mechanisms are little known. We comparatively investigated the initial surface corrosion morphologies of melt-spun Mg 66 Zn 30 Ca 4 MG in deionized water and artificial seawater. It was found that the basic corrosion behavior of the MG was the same, except that the corrosion process was accelerated in seawater. The presence of NaCl obviously promotes the formation of nano-ZnO on the surface of ribbons, causing the rapid degradation of azo dyes due to the photocatalytic effect. The degradation efficiency when combined with 3.5 wt % NaCl was over 100 times higher than that without NaCl. This indicates that Mg-Zn-Ca MG ribbons are effective additives for the degradation of azo dyes in seawater.

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Section: Discussionmentioning

confidence: 99%

Rapid Degradation of Azo Dyes by Melt-Spun Mg-Zn-Ca Metallic Glass in Artificial Seawater

Chen

et al. 2017

Metals

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“…It was found that a AgCu core-shell microstructure could be generated by dealloying a Zr-Cu-Ag-Al-O crystalline composite: Zr, Al and their oxides were dissolved, leaving Ag on the Cu surface [ 232 ]. Besides core-shell microstructures, single-phase supersaturated AgCu nanoalloys were synthesized through the dealloying of Ma-(Ag, Cu)-Y metallic glass precursors in H 2 SO 4 [ 233 , 234 ].…”

Section: Mixed Ag–cu Nps and Agcu Nanoalloysmentioning

confidence: 99%

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Fan

Yahia

Sacher

2021

Biology

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Microbes, including bacteria and fungi, easily form stable biofilms on many surfaces. Such biofilms have high resistance to antibiotics, and cause nosocomial and postoperative infections. The antimicrobial and antiviral behaviors of Ag and Cu nanoparticles (NPs) are well known, and possible mechanisms for their actions, such as released ions, reactive oxygen species (ROS), contact killing, the immunostimulatory effect, and others have been proposed. Ag and Cu NPs, and their derivative NPs, have different antimicrobial capacities and cytotoxicities. Factors, such as size, shape and surface treatment, influence their antimicrobial activities. The biomedical application of antimicrobial Ag and Cu NPs involves coating onto substrates, including textiles, polymers, ceramics, and metals. Because Ag and Cu are immiscible, synthetic AgCu nanoalloys have different microstructures, which impact their antimicrobial effects. When mixed, the combination of Ag and Cu NPs act synergistically, offering substantially enhanced antimicrobial behavior. However, when alloyed in Ag–Cu NPs, the antimicrobial behavior is even more enhanced. The reason for this enhancement is unclear. Here, we discuss these results and the possible behavior mechanisms that underlie them.

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“…30 of the Cu-Ag binary phase diagram; as such it is expected that two distinct phases are formed. The formation mechanism of the NPCuAg structure can be explained as follow: previous research have demonstrated that Zr has lower corrosion potential in HF solution while Cu and Ag are relatively noble, 21,34 Zr atoms easily dissolve from the amorphous matrix into HF solution, and Cu and Ag constituents are retained and self-organize to form a crystalline nanostructure at the reaction interface. 31 The morphologies and chemical compositions development of NPCuAg with different dealloying time periods are investigated by FSEM.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, a nanoporous bimetallic Ag-Cu alloy was synthesized by dealloying Mg-(Ag-Cu)-Y metal glass precursor. 31 It is worth noting that Mgand Ca-based metal glass precursors show poor mechanical robustness and flexibility, which is why nanoporous metals dealloyed from these precursors can't be applied in flexible energy storage devices. Therefore, appropriate metal glass systems and the effects of different dealloying parameters, such as the etchant concentration, dealloying time, dealloying temperature, and dealloying voltage profiles, should be explored to achieve a thicker nanoporous layer while still keeping good flexibility.…”

mentioning

confidence: 99%

Flexible Bimetallic Nanoporous Cu-Ag Synthesized by Electrochemical Dealloying for Battery-Type Electrodes with High Electrochemical Performance

Wang

Zhang

et al. 2018

J. Electrochem. Soc.

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Formation and evolution of nanoporous bimetallic Ag-Cu alloy by electrochemically dealloying Mg-(Ag-Cu)-Y metallic glass

Cited by 37 publications

References 62 publications

Rapid Degradation of Azo Dyes by Melt-Spun Mg-Zn-Ca Metallic Glass in Artificial Seawater

Rapid Degradation of Azo Dyes by Melt-Spun Mg-Zn-Ca Metallic Glass in Artificial Seawater

Antimicrobial Properties of the Ag, Cu Nanoparticle System

Flexible Bimetallic Nanoporous Cu-Ag Synthesized by Electrochemical Dealloying for Battery-Type Electrodes with High Electrochemical Performance

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