environment-friendly preparation of exfoliated graphite

Preparation of Sulfur

The sulfur-free exfoliated graphite (EG) was prepared by a two-step chemical oxidation process, using natural flake graphite (NFG) as the precursor. The first chemical intercalation process was carried out at a temperature of 30#xb0;C for 50#x2009;min, with the optimum addition of NFG, potassium permanganate, and perchloric acid in a weight ratio of 1#x2009;:#x2009;0.4#x2009;:#x2009;10

Nanomaterials

Graphite can be successfully exfoliated by the high-shear forces because of the continual rotation of rotor [19,53]. In the exfoliation process, not only high-shear forces play a major role, but also the collision and micro-jet cavitation can have an effect on the graphite exfoliation ( Figure 32 ) [ 56 ].

Synthesis and Characterization of Exfoliated

Exfoliated graphite was prepared by chemical route and then further subjected to thermal oxidation and sonication for size reduction and increased interlayer spacing in natural flake graphite. Exfoliated graphite/ABS composites were pre-pared with varying filler

Microbial reduction of graphene oxide by Escherichia coli:

In this paper, we developed an environment friendly, cost effective, simple method and green approaches for the reduction of graphene oxide (GO) using Escherichia coli biomass. In biological method, we can avoid use of toxic and environmentally harmful reducing agents commonly used in the chemical reduction of GO to obtain graphene.

Solvothermal Reduction of Chemically Exfoliated

We have developed a solvothermal reduction method that affords more effective reduction of chemically derived graphene sheets and graphite oxide than low-temperature reduction methods. Solvothermal reduction removed oxygen and defects from graphene sheets, increased the size of sp2 domains, and produced materials that were as conducting as pristine graphene and exhibited clear intrinsic Dirac

An economic and facile method for graphene oxide

Graphite oxide, containing abundant oxygen-based groups, not only can be obtained easily from the oxidation of graphite, but also can be readily exfoliated to graphene oxide (GO) nanosheets. In many studies, GO is regarded as the precursor to produce reduced graphene oxide (rGO) by chemical and thermal reduction [ 6 – 8 ].

Preparation of silver/chemically reduced graphene

The results are fitted into five peaks. For the graphite oxide, the carbon in C–O bonds (286.3 eV), carbonyl carbon (C=O, 287.6 eV) and carboxylate carbon (O–C=O, 289.0 eV) all exhibit a high intensity, indicating considerable oxidation of graphite [].

Microbial reduction of graphene oxide by Escherichia coli:

In this paper, we developed an environment friendly, cost effective, simple method and green approaches for the reduction of graphene oxide (GO) using Escherichia coli biomass. In biological method, we can avoid use of toxic and environmentally harmful reducing agents commonly used in the chemical reduction of GO to obtain graphene.

Environmentally friendly preparation of exfoliated graphite

2014/7/25Graphite intercalation compounds (GIC), expand in volume several hundred fold when they are subjected to thermal shock, forming exfoliated graphite. Exfoliated graphite offers a unique set of properties including compactibility, flexibility, high electrical and thermal conductivity, and

An Economic and Facile Method for Graphene Oxide Preparation from Graphite

In this work we propose a new, environment-friendly, and economic method for preparing GO powder on a large scale using commercially available graphite powders. The method consists of chemical and thermal oxidation steps. The structure and morphology of

Green synthesis of graphene by using tomato juice

CN101602504A 2009-12-16 Preparation method of graphene based on ascorbic acid CN101875491A 2010-11-03 Green preparation method of graphene based on tea polyphenol/green tea juice CN104261401A 2015-01-07 Preparation method of graphene EP2639201

Electrochemically modified graphite nanosheets and

A novel, facile, and environment friendly approach based on electrochemical oxidation and ultrasonication was presented to prepare electrically conductive graphite nanosheets (GNs). The as‐prepared GNs with a large aspect ratio were then incorporated into poly (vinyl alcohol) (PVA) by solution compounding. The GNs can be well and stably dispersed in water medium without the need

An Economic and Facile Method for Graphene Oxide Preparation from Graphite

In this work we propose a new, environment-friendly, and economic method for preparing GO powder on a large scale using commercially available graphite powders. The method consists of chemical and thermal oxidation steps. The structure and morphology of

Functionalized Graphene Nanosheets with Fewer

We proposed a cost-efficient method to produce graphene nanosheets from graphite by using a high shear mixer in an aqueous sodium alginate (SA) solution. The results from transmission electron microscopy, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis revealed that the graphite was successfully exfoliated into graphene

Preparation of Sulfur

2017/1/1Free Online Library: Preparation of Sulfur-Free Exfoliated Graphite by a Two-Step Intercalation Process and Its Application for Adsorption of Oils.(Research Article, Technical report) by Journal of Chemistry; Methods Production processes Usage Oil spill equipment

Exfoliated graphite preparation based on an eco

2020/10/1Exfoliated graphite was prepared using an ecofriendly method based on mechanochemical milling. • This dry route avoids the use of solvents, corrosive chemicals and related disposal issues. • Used exfoliating chemicals were calcium carbonate and vinegar, both

Preparation of interference pigments using black graphite

The graphite nanosheet (GNS) pigments contain no heavy metals and are nonfading pigments composed of exfoliated graphite and TiO 2. GNSs, as a novel substrate for interference pigments, were prepared by wet dispersion with a dispersant and a hydrogen peroxide–urea complex to maintain a sheet structure with few defects.

Materials

A simple, novel approach is proposed for the preparation of plasma-exfoliated graphene (PEGN) by reducing graphene oxide (GO) through a dielectric-barrier discharge (DBD) plasma treatment in a H2 atmosphere. The surface chemistry, microstructures, and crystallinity of the prepared samples were characterized via X-ray photoelectron spectroscopy, transmission electron microscopy, and Raman

Materials

A simple, novel approach is proposed for the preparation of plasma-exfoliated graphene (PEGN) by reducing graphene oxide (GO) through a dielectric-barrier discharge (DBD) plasma treatment in a H2 atmosphere. The surface chemistry, microstructures, and crystallinity of the prepared samples were characterized via X-ray photoelectron spectroscopy, transmission electron microscopy, and Raman

An economic and facile method for graphene oxide

Graphite oxide, containing abundant oxygen-based groups, not only can be obtained easily from the oxidation of graphite, but also can be readily exfoliated to graphene oxide (GO) nanosheets. In many studies, GO is regarded as the precursor to produce reduced graphene oxide (rGO) by chemical and thermal reduction [ 6 – 8 ].

Environment

Environment-friendly preparation of exfoliated graphite and functional graphite Journal of Materiomics ( IF 5.797) Pub Date : 2020-08-06, DOI: 10.1016/j.jmat.2020.06.009 Shiyu Hou, Shuaijie He, Tianle Zhu, Jihui Li, Liqiang Ma, Hongda Du, Wanci Shen, Feiyu Kang, Zheng-Hong Huang

Electrochemically modified graphite nanosheets and

A novel, facile, and environment friendly approach based on electrochemical oxidation and ultrasonication was presented to prepare electrically conductive graphite nanosheets (GNs). The as‐prepared GNs with a large aspect ratio were then incorporated into poly (vinyl alcohol) (PVA) by solution compounding. The GNs can be well and stably dispersed in water medium without the need

Preparation and its adsorptive property of modified

2014/1/1Free Online Library: Preparation and its adsorptive property of modified expanded graphite nanomaterials.(Research Article, Report) by Journal of Chemistry; Adsorption Models Graphite Chemical properties Production processes Scanning microscopy Methods

A simple and efficient method to prepare graphene by reduction of graphite

An environment-friendly preparation of reduced graphene oxide nanosheets via aminoacid Dezhi Chen, Lidong Li and Lin Guo-A Green and Mild Approach of Synthesis of Highly-Conductive Graphene Film by Zn Reduction of Exfoliated Graphite Oxide Zhi-gang

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