Synthesis of crystalline graphite from disordered graphite by acoustic shock waves: Hot-spot nucleation approach

Sivakumar, Aswathappa; Dai, Lidong; Sahaya Jude Dhas, S; Martin Britto Dhas, S.A; Eniya, Palaniyasan; Suresh Kumar, Raju; Almansour, Abdulrahman I.

doi:10.1016/j.apsusc.2024.159632

Applied Surface Science

2024

DOI: 10.1016/j.apsusc.2024.159632

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Synthesis of crystalline graphite from disordered graphite by acoustic shock waves: Hot-spot nucleation approach

Aswathappa Sivakumar,

Lidong Dai,

S Sahaya Jude Dhas

et al.

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Cited by 4 publications

References 45 publications

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A Self‐foaming Strategy to Construct Small Mo₂C Nanoparticles Decorated 3D Carbon Foams as Superior Electromagnetic Wave Absorbing Materials with Strong Corrosion Resistance

Liu,

Zhang,

Liu

et al. 2024

Small Methods

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Abstract3D macroporous carbon‐based foams are always considered as promising candidates for high‐performance electromagnetic (EM) wave absorbing materials due to the collaborative EM contribution and salutary structure effect. However, the uneven distribution of heterogeneous EM components and the cumbersome preparation process have become key issues to hinder their performance improvement and practical popularity. Herein, the fabrication of 3D carbon foam decorated with small and highly dispersed Mo2C nanoparticles is realized by an innovative self‐foaming strategy. The foaming mechanism can be attributed to the decomposition of nitrate during the softening process of organic polymers. The good dispersion of Mo2C nanoparticles boosts interfacial polarization significantly. After regulating the content of Mo2C nanoparticles, the optimal Mo2C/CF‐x exhibits good EM absorption performance, whose minimum reflection loss intensity value can reach up to ‐72.2 dB, and effective absorption bandwidth covers 6.7 GHz with a thickness of 2.30 mm. Very importantly, the resultant Mo2C/CF‐x exhibits hydrophobicity and strong acidic anticorrosion, and a long‐time treatment in HCl solution (6.0 mol L−1) produces negligible impacts on their EM functions. It is believed that this extraordinary feature may render Mo2C/C foams as qualified and durable EM wave absorbing materials (EWAMs) under rigorous conditions.

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A Self‐foaming Strategy to Construct Small Mo₂C Nanoparticles Decorated 3D Carbon Foams as Superior Electromagnetic Wave Absorbing Materials with Strong Corrosion Resistance

Liu,

Zhang,

Liu

et al. 2024

Small Methods

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Acoustic Shock Wave-Induced Rutile to Anatase Phase Transition of TiO₂ Nanoparticles and Exploration of Their Unconventional Thermodynamic Structural Transition Path of Crystallization Behaviors

Aswathappa,

Dai,

Sathiyadhas

et al. 2024

Inorg. Chem.

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Titanium dioxide (TiO 2 ) is one of the most well-known and longstanding polymorphic materials in the transition metal oxide group of materials. The transition from rutile to anatase is one of the long-standing fundamental questions among materials science researchers because seeking the nucleation site at the beginning of the phase transition is highly challenging. Until now, there have been no studies on the unconventional structural phase transition of TiO 2 nanoparticles by acoustic shock waves. In the present study, this work provides the first evidence on the solid-state nanostructure of the rutile-to-anatase phase transition of TiO 2 by acoustic shock waves whereby these phase transition results are evaluated by Raman spectroscopy, thermal calorimetry, X-ray photoelectron spectroscopy, and microscopic techniques. We propose a novel mechanism for the occurrence of the rutileto-anatase phase transition based on thermophysical properties and shock waveinduced melting concepts. Under shocked conditions, the R−A phase transition occurs because of the anatase phase's lower interfacial energy (γ L/A ) and surface energy compared to rutile. We strongly believe that the present work can provide in-depth insight into understanding the crystallization concepts of the TiO 2 NPs under extreme conditions, especially with regard to the rutile-to-anatase phase transition.

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Acoustic shock wave-induced superheating-assisted dynamic recrystallization – a case study of d-tartaric acid

Aswathappa,

Dai,

Sathiyadhas

et al. 2025

Phys. Chem. Chem. Phys.

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Synthesis of crystalline graphite from disordered graphite by acoustic shock waves: Hot-spot nucleation approach

Cited by 4 publications

References 45 publications

A Self‐foaming Strategy to Construct Small Mo₂C Nanoparticles Decorated 3D Carbon Foams as Superior Electromagnetic Wave Absorbing Materials with Strong Corrosion Resistance

A Self‐foaming Strategy to Construct Small Mo₂C Nanoparticles Decorated 3D Carbon Foams as Superior Electromagnetic Wave Absorbing Materials with Strong Corrosion Resistance

Acoustic Shock Wave-Induced Rutile to Anatase Phase Transition of TiO₂ Nanoparticles and Exploration of Their Unconventional Thermodynamic Structural Transition Path of Crystallization Behaviors

Acoustic shock wave-induced superheating-assisted dynamic recrystallization – a case study of d-tartaric acid

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Synthesis of crystalline graphite from disordered graphite by acoustic shock waves: Hot-spot nucleation approach

Cited by 4 publications

References 45 publications

A Self‐foaming Strategy to Construct Small Mo2C Nanoparticles Decorated 3D Carbon Foams as Superior Electromagnetic Wave Absorbing Materials with Strong Corrosion Resistance

A Self‐foaming Strategy to Construct Small Mo2C Nanoparticles Decorated 3D Carbon Foams as Superior Electromagnetic Wave Absorbing Materials with Strong Corrosion Resistance

Acoustic Shock Wave-Induced Rutile to Anatase Phase Transition of TiO2 Nanoparticles and Exploration of Their Unconventional Thermodynamic Structural Transition Path of Crystallization Behaviors

Acoustic shock wave-induced superheating-assisted dynamic recrystallization – a case study of d-tartaric acid

Contact Info

Product

Resources

About

A Self‐foaming Strategy to Construct Small Mo₂C Nanoparticles Decorated 3D Carbon Foams as Superior Electromagnetic Wave Absorbing Materials with Strong Corrosion Resistance

A Self‐foaming Strategy to Construct Small Mo₂C Nanoparticles Decorated 3D Carbon Foams as Superior Electromagnetic Wave Absorbing Materials with Strong Corrosion Resistance

Acoustic Shock Wave-Induced Rutile to Anatase Phase Transition of TiO₂ Nanoparticles and Exploration of Their Unconventional Thermodynamic Structural Transition Path of Crystallization Behaviors