Onsuda Arayawut

Bio: Onsuda Arayawut is an academic researcher from Kasetsart University. The author has contributed to research in topics: Graphene & Quantum dot. The author has an hindex of 1, co-authored 2 publications receiving 15 citations.

Synthesis, Characterization, and Applications of Graphene and Derivatives

Abstract: Graphene is a two-dimensional sheet of sp2 hybridized carbon atoms packed in a hexagonal lattice. Due to its unique properties including a zero-gap band structure, high electron mobility, high thermal and electrical conductivity, chemical tunability, and high specific surface area, graphene has been considered one of the most promising materials for a wide range of applications and opened up new opportunities for future devices. In this chapter, we aim to present theoretical backgrounds of structural and electronic properties, synthesis techniques, main characterizations, and state-of-the-art applications of graphene as well as its derivatives such as graphene quantum dot, carbon nanotube, and 3D pillared graphene. The electronic band structure of graphene is discussed based on a tight binding method. Popular synthesis techniques including chemical exfoliation, electrochemical exfoliation method, chemical vapor deposition, and microwave irradiation method for graphene and derivatives growth are presented. Recent advances in graphene-based applications, such as sensors, transistors, energy storage, water purification membranes, solar cells, and elastomeric applications are highlighted.

Structures, Electronic Properties, and Gas Permeability of 3D Pillared Silicon Carbide Nanostructures

Abstract: Silicon carbide (SiC) is recognized as excellent material for high power/temperature applications with a wide-band gap semiconductor. With different structures at the nanosize scale, SiC nanomaterials offer outstanding mechanical, physical, and chemical properties leading to a variety of applications. In this work, new 3D pillared SiC nanostructures have been designed and investigated based on self-consistent charge density functional tight-binding (SCC-DFTB) including Van der Waals dispersion corrections. The structural and electronic properties of 3D pillared SiC nanostructures with effects of diameters and pillar lengths have been studied and compared with 3D pillared graphene nanostructures. The permeability of small gas molecules including H2O, CO2, N2, NO, O2, and NO2 have been demonstrated with different orientations into the 3D pillared SiC nanostructures. The promising candidate of 3D pillared SiC nanostructures for gas molecule separation application at room temperature is highlighted.

Chemical Vapour Deposition of Graphene—Synthesis, Characterisation, and Applications: A Review

Abstract: Graphene as the 2D material with extraordinary properties has attracted the interest of research communities to master the synthesis of this remarkable material at a large scale without sacrificing the quality. Although Top-Down and Bottom-Up approaches produce graphene of different quality, chemical vapour deposition (CVD) stands as the most promising technique. This review details the leading CVD methods for graphene growth, including hot-wall, cold-wall and plasma-enhanced CVD. The role of process conditions and growth substrates on the nucleation and growth of graphene film are thoroughly discussed. The essential characterisation techniques in the study of CVD-grown graphene are reported, highlighting the characteristics of a sample which can be extracted from those techniques. This review also offers a brief overview of the applications to which CVD-grown graphene is well-suited, drawing particular attention to its potential in the sectors of energy and electronic devices.

Graphene synthesis, characterization and its applications: A review

Abstract: Since 2004, graphene has attracted a lot of attention among scientists and engineers. In recent years, graphene, a two dimensional monolayer planar sheet of sp2-bonded carbon atom has witnessed a revolution in its applications because of its exemplary unique properties in terms of large specific surface area, physicochemical properties, mechanical strength, extraordinary thermal and electronic conductivity. There are several techniques used to synthesize high-quality graphene on a large scale. This review summarizes the fabrication of graphene by chemical, mechanical, thermal decomposition and chemical vapor deposition. In addition, the characterization methods and applications of graphene in different research fields have been discussed. This article winds up by giving a brief summary, illuminate the problems, and states the prospects of graphene.

A critical review on graphene oxide nanostructured material: Properties, Synthesis, characterization and application in water and wastewater treatment

Abstract: Graphene oxide is an emerging nanomaterial with diverse applications for energy storage, conversation (electrodes) and industrial wastewater treatment (adsorbent and photocatalysts) because of their outstanding electrical, thermal and chemical properties. In view of this background, this review paper examines the properties, preparation methods and characterization techniques for graphene oxide (GO) nanostructured materials. A brief strategy for improving GO efficiency such as doping/co-doping GO with selected heterogeneous semiconductor metal oxides was provided. The immobilisation of GO with a high bandgap material resulting to the shifting of absorption threshold to the visible region and enhancement of photoactivity performance were also discussed. The application of GO based nanomaterial in Fenton like reaction, ozonation , photocatalysis , photo-Fenton, photoelectrocatalysis and combination of photocatalysis and photon-Fenton for water treatment applications were provided. The presence of graphene oxide nanostructured materials in composite material enhanced the overall performance in their respective applications. Finally, the review provides insight into future perspectives and improvements especially the scaling up of graphene oxide based nanocomposites based technology for industrial wastewater treatment.