Room Temperature Electrochemical Synthesis of Crystalline GaOOH Nanoparticles from Expanding Liquid Metals

Lertanantawong, Benchaporn; Riches, James D.; O’Mullane, Anthony P.

doi:10.1021/acs.langmuir.8b00538

Cited by 25 publications

(30 citation statements)

References 46 publications

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“…And a similar phenomenon appeared when gallium was electrochemically oxidized. [ 55 ] Gallium‐based LMs are prone to oxidation due to some electrons quickly outflowing from LM to RGO, and the oxidation was reported when LM was placed on the surface of graphite. [ 22 ] It suggested that the chemical transformation could happen for LM@RGO once RGO shell broke.…”

Section: Resultsmentioning

confidence: 99%

Galvanic Replacement of Liquid Metal/Reduced Graphene Oxide Frameworks

Wang

Chang

et al. 2020

Adv Materials Inter

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have increased dramatically. [1-3] Due to the excellent electrical and mechanical properties, gallium-based LM alloys are appropriate for flexible and stretchable electrodes and circuits and have gained a wide range of potential applications, such as 3D microstructure printing, [4] soft and stretchable electronics, [5-8] and energy storage. [9] Moreover, the unique properties of bulk gallium-based LMs in chemistry have been taken more attention [2] in the areas of biomedical theranostics, [10,11] chemical catalysts, [12] and synthesis of nanostructured materials in different shapes. [13-15] Utilizing gallium-based LMs as the reaction platform, 2D metal oxide [16] and graphene [17] have been synthesized on the surface of gallium-based LMs. Based on the amalgamation of LMs, a number of gallium-based binary-metal crystals have been produced, such as CuGa 2 crystal [13] produced by the electrochemistry and GaPd crystal [14] from the Czochralski method. Meanwhile, the galvanic replacement has been introduced to form noble metal nanoparticles and nanostructured gallium-based compounds, which is a simple and promising chemical route based on the redox reaction. [15,18] On the macroscale, a variety of noble metal nanoparticles could be produced via galvanic replacements between the bulk gallium-based LMs and precursors of noble metals. [19] And the gold thin films with the tunable surface morphology were formed on the surface of bulk gallium-based LMs in different pH ranges. [20] In the nanoscale, largely because of the low melting point [19,21] and deformability, [22] ultrasonication has been widely introduced to the preparation of nanoscale LM droplets. [5,23-31] For the nanoscale LM droplets, Hoshyargar et al. [19] carried out an experiment in which the bulk LM and the Ag/Au precursors were simultaneously under sonication, and the mixture of nanorice-like particles and Ag/Au nanoparticles was obtained. The galvanic replacement reactions between the gold precursor and the submicrometer LM droplets capped with polyvinylpyrrolidone, lysozyme or sodium alginate were studied by David et al. [15] And the morphology and composition of Au-LM frameworks influenced by the reaction rates were analyzed in the different concentrations of the alkaline gold precursor solution. However, the mechanism of galvanic replacement of LM nanodroplets is not still clearly explained. The diffusion resistance of metal precursors could affect the redox reaction between the metal precursors

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Section: Resultsmentioning

confidence: 99%

Galvanic Replacement of Liquid Metal/Reduced Graphene Oxide Frameworks

Wang

Chang

et al. 2020

Adv Materials Inter

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“…2a) which are consistent with the formation of Ga oxides. [33][34][35] It is known that gallium oxides are soluble in acidic solution 36 and therefore the pH of the solution was controlled via the addition of HCl at various concentrations to minimise its formation. When the solution was acidied using 10 mM HCl there was a clear change in the morphology of the material ejected from the liquid metal ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of 2D cobalt oxide nanosheets using a room temperature liquid metal

2020

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“…The potential was varied to allow for crystal formation and subsequent ejection from the liquid metal into a sodium nitrate/sodium hydroxide solution of varying pH, which aided in the tailoring of particle size and shape. 78 This method differs from the previous two examples as the source of the synthesised material is the liquid metal and not the solution it was suspended in. It also produces crystalline oxyhydroxide nanoparticles and not 2D metal oxide sheets in contrast to other synthesised materials discussed here, however, the approach may useful for the synthesis of other 2D materials in the future.…”

Section: Two-dimensional Metal Oxides From Liquid Metal-based Synthes...mentioning

confidence: 99%