Direct observation by high resolution transmission electron microscopy of gold(<scp>iii</scp>) particle transformation during aging reduction reaction

Ferguson, Michael J.; Richard, Austin; Valdez, Jesus; Fiss, Blaine G.; Provatas, Nikolas; Friščić, Tomislav; Moores, Audrey

doi:10.1039/d2fd00126h

Cited by 4 publications

(3 citation statements)

References 55 publications

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“…This effect and the way precursor NPs evolved over time were addressed in depth previously. 30 The smaller NPs, made of Au(0), were very similar to the blank test NPs and because solid state techniques (especially PXRD and DRS) did not indicate the presence of Au(0) NPs, we attributed their presence to this sampling artefact.…”

Section: Resultsmentioning

confidence: 95%

“…29 Our group has also studied the way with which HAuCl 4 NPs, as precursors to Au NPs, evolve and react at the onset of such reactions. 30 We have also presented the first theoretical model for AuNP nucleation under mechanochemical conditions, which introduced a ballistic term as a way to parametrise the role of mechanical energy in the formation of amine-stabilised AuNPs. 31 Yet, despite such efforts, no study has permitted the tracking of NP formation and transformation in a mechanochemical set up.…”

Section: Introductionmentioning

confidence: 99%

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In situ study of Au nanoparticle formation in a mechanochemical-aging-based method

et al. 2023

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Section: Resultsmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

In situ study of Au nanoparticle formation in a mechanochemical-aging-based method

et al. 2023

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“…The methodology was first used for the real-time observation of the reduction of hydrated tetrachloroauric(III) acid (HAuCl 4 ·3H 2 O) with different reducing agents: hydroquinone, ascorbic acid, and NaBH 4 . This work was subsequently complemented through electron microscopy imaging, not through real-time monitoring but through the step-by-step observation of ageing of mechanically activated samples [ 209 ].…”

Section: Characterization Methodsmentioning

confidence: 99%

Shaking Things from the Ground-Up: A Systematic Overview of the Mechanochemistry of Hard and High-Melting Inorganic Materials

Auvray

Friščić

2023

Molecules

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We provide a systematic overview of the mechanochemical reactions of inorganic solids, notably simple binary compounds, such as oxides, nitrides, carbides, sulphides, phosphides, hydrides, borides, borane derivatives, and related systems. Whereas the solid state has been traditionally considered to be of little synthetic value by the broader community of synthetic chemists, the solid-state community, and in particular researchers focusing on the reactions of inorganic materials, have thrived in building a rich and dynamic research field based on mechanically-driven transformations of inorganic substances typically seen as inert and high-melting. This review provides an insight into the chemical richness of such mechanochemical reactions and, at the same time, offers their tentative categorisation based on transformation type, resulting in seven distinct groupings: (i) the formation of adducts, (ii) the reactions of dehydration; (iii) oxidation–reduction (redox) reactions; (iv) metathesis (or exchange) reactions; (v) doping and structural rearrangements, including reactions involving the reaction vessel (the milling jar); (vi) acid–base reactions, and (vii) other, mixed type reactions. At the same time, we offer a parallel description of inorganic mechanochemical reactions depending on the reaction conditions, as those that: (i) take place under mild conditions (e.g., manual grinding using a mortar and a pestle); (ii) proceed gradually under mechanical milling; (iii) are self-sustained and initiated by mechanical milling, i.e., mechanically induced self-propagating reactions (MSRs); and (iv) proceed only via harsh grinding and are a result of chemical reactivity under strongly non-equilibrium conditions. By elaborating on typical examples and general principles in the mechanochemistry of hard and high-melting substances, this review provides a suitable complement to the existing literature, focusing on the properties and mechanochemical reactions of inorganic solids, such as nanomaterials and catalysts.

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Development of green molecularly imprinted polymers for the treatment of wastewater samples

Ünal,

Karasu,

Özgür

et al. 2024

Green Imprinted Materials

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Direct observation by high resolution transmission electron microscopy of gold(iii) particle transformation during aging reduction reaction

Abstract: tbc

Cited by 4 publications

References 55 publications

In situ study of Au nanoparticle formation in a mechanochemical-aging-based method

In situ study of Au nanoparticle formation in a mechanochemical-aging-based method

Shaking Things from the Ground-Up: A Systematic Overview of the Mechanochemistry of Hard and High-Melting Inorganic Materials

Development of green molecularly imprinted polymers for the treatment of wastewater samples

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