Download Carbon nanomaterials based on graphene nanosheets by Ling Bing Kong PDF

By Ling Bing Kong

Since the invention of graphene, it has turn into essentially the most generally and largely studied fabrics. This publication goals to summarize the development in synthesis, processing, characterization and purposes of a unique staff of nanocarbon fabrics derived from graphene or graphene similar derivatives through the use of a number of thoughts in numerous varieties. extra in particular, 3 kinds of macrosized fabrics are provided, i.e., one-dimension or 1D (fibers, wires, yarns, streads, etc.), two-dimension or second (films, membranes, papers, sheets, etc.) and three-dimension or 3D (bulk, hydrogels, aerogels, foams, sponges, etc.). Seven chapters are integrated with the 1st bankruptcy helping introduce the concept that, definition, and nomenclature of graphene, graphene oxide and their derivatives. the most themes are lined in Chapters 2‒7. even supposing they've got coherent connections, each one bankruptcy of them is designed such that they are often studied independently.

The aim readers of this booklet comprise undergraduate scholars, postgraduate scholars, researchers, designers, engineers, professors, and program/project managers from the fields of fabrics technological know-how and engineering, utilized physics, chemical engineering, biomaterials, fabrics production and layout, institutes, and examine founding agencies.

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A straight line fitting led to the absorption coefficient at 660 nm to be R = 1390 ml·(mg·m)‒1, which was in agreement with the content of graphite/graphene. 36 shows representative TEM images of the different types of graphene nanosheets obtained by using the surfactant exfoliation method [109]. A small quantity of monolayer graphene flakes was observed, as shown in Fig. 36 (A). A larger proportion of flakes were few-layer graphene sheets, including both bilayers and trilayers, as shown in Fig.

According to Raman spectroscopies, the graphene nanosheets derived at centrifugation rates of < 2000 rpm were nearly defect-free. The dispersions can be used to fabricate high-quality free-standing graphene films. Natural flake graphite was used as starting material. 01–20 mg·ml‒1. Graphene dispersions were prepared by adding the graphite powder at an initial concentration of CG,i = 5 mg·ml‒1 to 400 ml NaC solution in 500 ml capped roundbottomed flasks. Various surfactant concentrations (CNaC) were used.

All these groups disappeared in the flash reduced rGO. The flash reduced rGO film also showed much lower transmission in the IR spectrum, demonstrating the electrically conducting characteristic of the carbon [86]. 23, respectively. The GO films generally exhibited an expansion by more than ten times in volume after the flash reduction, due to the rapid degassing, as shown in Fig. 22 (e). This observation is different from that of the rGO film obtained by using the electrochemical reduction method, as discussed above [37].

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