Thermolysis of Polymeric Metal Chelates

Uflyand, Igor Е.; Джардималиева, Г. И.

doi:10.1007/978-3-319-93405-1_4

Cited by 3 publications

(2 citation statements)

References 550 publications

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“…An emerging approach for synthesizing such heterostructures has been the thermal decomposition of metal salts on carbon substrates. ,, In such cases, it is crucial to carefully choose heating rates to achieve a thorough reduction of the salt into the metallic state and prevent excessive sintering of the metal nanoparticles throughout the reduction process . Recent interest in nanoparticle synthesis has shifted toward ultrafast heating processes to synthesize new nanomaterials. ,− For instance, multielement nanoparticles formed on carbon substrates by rapid microwave heating and thermal decomposition of metal salts under an argon atmosphere .…”

Section: Introductionmentioning

confidence: 99%

Role of Kinetics and Thermodynamics in Controlling the Crystal Structure of Nickel Nanoparticles Formed on Reduced Graphene Oxide: Implications for Energy Storage and Conversion Applications

Saray

Yurkiv

Shahbazian‐Yassar

2023

ACS Appl. Nano Mater.

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Ultrafast heating has emerged recently to speed up the synthesis processes of nanoparticles and control their morphology. However, it is not clear how the heating rate affects the formation of metal nanoparticles, particularly those formed on substrates. Here, we explored the formation of nickel (Ni) nanoparticles on graphene oxide (GO) substrates under slow (20 °C/min) and ultrafast (10 3 °C/s) heating rates. The experiments were performed in situ on heating microchip devices using an aberration-corrected transmission electron microscope. Interestingly, the GO structure was the most effective in controlling the stability of nanoparticles when ultrafast heating was employed, leading to a hexagonally close-packed Ni phase (hcp-Ni) because of less lattice mismatch with the graphitic substrate. On the contrary, fcc-Ni nanoparticles formed under a slow heating process where no strong correlation with the GO crystal structure was observed. Additionally, ultrafast heating resulted in smaller-size nanoparticles which could be ascribed to rapid reduction, nucleation rate, and higher diffusion barrier of hcp-Ni crystals on rGO. Nevertheless, the stability of the crystal structure of the nickel nanoparticles remains unaffected by their size. These results indicate the crucial role of the substrate on crystal structure during the nonequilibrium processing of materials and the competing effects of thermodynamics versus kinetics in creating novel phases of materials for energy storage and conversion applications.

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Section: Introductionmentioning

confidence: 99%

Role of Kinetics and Thermodynamics in Controlling the Crystal Structure of Nickel Nanoparticles Formed on Reduced Graphene Oxide: Implications for Energy Storage and Conversion Applications

Saray

Yurkiv

Shahbazian‐Yassar

2023

ACS Appl. Nano Mater.

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“…Recently, active research has been conducted on the thermolysis of metal-containing monomers, where MCMs function as single-source precursors for obtaining nanocomposite materials in which metal nanoparticles (NPs) are stabilized by a carbon or polymer shell [ 33 , 34 ]. Silver NPs favorably stand out among various metal NPs because of the manifestation of a wide range of properties: outstanding plasmonic activity, antibacterial activity, chemical stability, good thermal and electrical conductivity, and catalytic activity [ 35 , 36 , 37 , 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

Silver Itaconate as Single-Source Precursor of Nanocomposites for the Analysis of Chloride Ions

et al. 2022

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At present, conjugated thermolysis of metal-containing monomers is widely used as single-source precursors to obtain new metal- and metal oxide-containing nanocomposites. In this study, a detailed analysis of the main stages of conjugated thermolysis of silver itaconate was carried out. The obtained nanocomposites containing silver nanoparticles are evenly distributed in a stabilizing carbon matrix. The structural characteristics and properties of the resulting nanomaterials were studied using X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDS). We have developed a method of test analysis of chlorides using paper modified with the obtained silver-containing nanocomposites. The analysis technique is based on the in situ conversion of chlorides to molecular chlorine, its dynamic release, and colorimetric detection using NP-modified paper test strips. A simple installation device is described that allows this combination to be realized. The proposed approach seems promising for nanoparticle-based determinations of other analytes that can be converted into volatile derivatives.

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FeCo@N‐Doped Nanoparticles Encapsulated in Polyacrylamide‐Derived Carbon Nanocages as a Functional Filler for Polyethylene System

et al. 2021

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In this work, using the advantages of Fe and Co nitrates acting as nucleation sites, we polymerized acrylamide (AAm) complexes using frontal polymerization to obtain FeCo alloy/Ndoped carbon composites by converting its original precursor. The results of PAAm coating were found to be extremely useful in suppressing the collapse of the FeCo microstructure during pyrolysis, resulting in a unique hierarchical FeCo@CÀ N coreshell nanoparticle architecture encapsulated in PAAm-derived carbon nanocages. The thermal, mechanical and magnetic properties of the resulting FeCo/CÀ N filling polyethylene system have been investigated and presented.

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Thermolysis of Polymeric Metal Chelates

Cited by 3 publications

References 550 publications

Role of Kinetics and Thermodynamics in Controlling the Crystal Structure of Nickel Nanoparticles Formed on Reduced Graphene Oxide: Implications for Energy Storage and Conversion Applications

Role of Kinetics and Thermodynamics in Controlling the Crystal Structure of Nickel Nanoparticles Formed on Reduced Graphene Oxide: Implications for Energy Storage and Conversion Applications

Silver Itaconate as Single-Source Precursor of Nanocomposites for the Analysis of Chloride Ions

FeCo@N‐Doped Nanoparticles Encapsulated in Polyacrylamide‐Derived Carbon Nanocages as a Functional Filler for Polyethylene System

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