kr101554912b1 - method for preparing graphite and

Synthesis of Graphene Oxide (GO) by Modified Hummers Method

In 1958, Hummers reported an alternative method for the synthesis of grapheme oxide by using KMnO 4 and NaNO 3 in concentrated H 2SO 4 [13]. GO prepared by this method could be used for preparing large graphitic films [14]. In the present work, oxidation

The preparation method of high purity graphite

2016/7/14The high purity graphite products are widely used in metallurgy, machinery, electronics, chemical, electrical, food and other industrial fields. For emitting an electron tube, thyratron, mercury arc rectifier with graphite plate,the grid plate; semiconductor technology

Method for preparing a graphite intercalation compound

A method for preparing a graphite intercalation compound having a metal or a metal compound inserted between adjacent graphite layers, comprising simultaneously introducing a mixture of a vapor of both a hydrocarbon compound and an organo metallic compound

A simple 'in situ' co

A simple 'in situ' co-precipitation method for the preparation of multifunctional CoFe 2 O 4 –reduced graphene oxide nanocomposites: excellent microwave absorber and highly efficient magnetically separable recyclable photocatalyst for dye degradation† Here, an 'in situ' co-precipitation reaction method has been reported for the preparation of CoFe 2 O 4 –RGO (CF–RGO

(PDF) A green method of graphene preparation in an

This new method of preparation of graphene is based on the interaction of potassium manganate in an alkaline environment with natural graphite in the presence of high-intensity ultrasound. This non-oxidative method allows the preparation of high-purity graphene with a minimum content of functional groups and defects.

Method for preparing graphite film

The method for preparing a graphite film is not limited to the configuration and the operation method in the above-described exemplary embodiments. Each of the above exemplary embodiments can be selected and combined in whole or in part to make various

New method for preparing graphene by peeling graphite

We report a new method for peeling graphite to graphene, with which we develop a facile procedure for the fabrication of bulk Bi0.45Sb1.55Te3.02/graphene by pushing thin graphite foils into pressed Bi0.45Sb1.55Te3.02 powders and then foliated into graphene under

Highly Efficient Preparation of Graphite Oxide without

Graphite oxide has become an important precursor for graphene oxide, reduced graphene oxide, and a wide range of other graphene-based materials or composites. In numerous Hummers' methods for the preparation of graphite oxide, water is added to promote the oxidization reaction but causes problems of tedious purification and liquid waste, which raises concerns of environment processing cost

New Method To Prepare Graphite Nanocomposites

A novel processing technique to fabricate graphene-based polymer nanocomposites via sulfur/graphite composite was developed. First, the sulfur/graphite composite was prepared, where sulfur nanoparticles were dispersed on the surfaces of graphenes. This was subsequently used to prepare polymer/graphite nanocomposites by the melt mixing method.

A Batch Preparation Method for Graphite Targets With

A Batch Preparation Method for Graphite Targets With Low Background for AMS 14C Measurements - Volume 35 Issue 2 We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept

New Method To Prepare Graphite Nanocomposites

A novel processing technique to fabricate graphene-based polymer nanocomposites via sulfur/graphite composite was developed. First, the sulfur/graphite composite was prepared, where sulfur nanoparticles were dispersed on the surfaces of graphenes. This was subsequently used to prepare polymer/graphite nanocomposites by the melt mixing method.

US Patent for Polyimide film for graphite sheet, graphite

The method for preparing a graphite sheet of the present disclosure has been made by noting the fact that among the crystal planes of the polyimide film as a raw material for preparation, in particular, the diffraction peak of (010) plane and the diffraction peak of

Highly Efficient Preparation of Graphite Oxide without

Graphite oxide has become an important precursor for graphene oxide, reduced graphene oxide, and a wide range of other graphene-based materials or composites. In numerous Hummers' methods for the preparation of graphite oxide, water is added to promote the oxidization reaction but causes problems of tedious purification and liquid waste, which raises concerns of environment processing cost

Synthesis of Graphene Oxide (GO) by Modified Hummers

as-received natural flake graphite in Figure 1(a), it can be concluded that it is highly crystalline and has a very intense (002) peak at 2θ = 26.42˚ having a d-spacing of 3.37Ǻ.Figure 5(b) shows the XRD plot of GO synthesized by modified Hummers method as well

Graphene: history, controversy and the Nobel prize

Geim and Novoselov extracted graphene from graphite, using the scotch tape method, to obtain a piece of graphene (or carbon) one atom thick. While winning the prestigious prize was definitely an impressive hallmark, this was not the first time graphene stood at the center of scientific attention.

Ultrasonic Graphene Production

Xu and Suslick (2011) describe a convenient one-step method for the preparation of polystyrene functionalized graphite. In their study, they used graphite flakes and styrene as basic raw material. By sonicating the graphite flakes in styrene (a reactive monomer), the ultrasound irradiation resulted in the mechanochemical exfoliation of graphite flakes into single-layer and few-layer graphene

A new method for preparation of functionalized graphene

2020/9/1Li et al., in 2016 delaminated graphite into few-layer graphene and graphite nanoplatelets in epoxy via fine tuning of shear force and resin temperature. The resulting composites showed a percolation threshold of ~1 wt% for electrical conductivity [50,51].

Simple Synthesis of Large Graphene Oxide Sheets via Electrochemical Method Coupled with Oxidation

graphite flake NaNO 3,H 2 SO 4, KMnO 4 Hummers' 15 12 h 50 graphite flake H 2 SO 4 /H 3 PO 4, KMnO 4 improved Hummers' 0.95 20 13 h 35 graphite powder H 2 SO 4, NaNO 3, KMnO 4,K 3 Fe(CN) 6 modified Hummers' 0.77 23 7.5 days 40 graphite 3 2

Method for preparing a graphite intercalation compound

A method for preparing a graphite intercalation compound having a metal or a metal compound inserted between adjacent graphite layers, comprising simultaneously introducing a mixture of a vapor of both a hydrocarbon compound and an organo metallic compound

Environment

2021/1/1Here, we propose a simple and effective preparation method to acquire EG in which flake graphite is intercalated and exfoliated at room temperature, not involving any pollutant emission. The influence factors in the preparation process were explored, such as the amount of H 2 SO 4 and H 2 O 2, the temperature for the preparation of room temperature exfoliated graphite (RTEG).

Porous graphene prepared from anthracite as high

2019/3/30The templating method for preparing porous graphene involves use of graphene layers deposited or grown on inorganic nanoparticles substrate (e.g. porous CaO, porous MgO sheets and sodium chloride, etc.) at desired conditions followed by the template,, ].

Ultrasonic Graphene Production

Xu and Suslick (2011) describe a convenient one-step method for the preparation of polystyrene functionalized graphite. In their study, they used graphite flakes and styrene as basic raw material. By sonicating the graphite flakes in styrene (a reactive monomer), the ultrasound irradiation resulted in the mechanochemical exfoliation of graphite flakes into single-layer and few-layer graphene

US Patent for Polyimide film for graphite sheet, graphite

The method for preparing a graphite sheet of the present disclosure has been made by noting the fact that among the crystal planes of the polyimide film as a raw material for preparation, in particular, the diffraction peak of (010) plane and the diffraction peak of

A RAPID METHOD TO PREPARE EXFOLIATED GRAPHITE USING SRI LANKAN VEIN GRAPHITE

reported. Therefore, this study is for the preparation of EG from NPG variety of Sri Lankan vein graphite by microwave irradiation method. 17. METHODOLOGY Graphite samples were collected from Kahatagaha-Kolongaha mine and NPG variety was

Graphene oxide: the mechanisms of oxidation and exfoliation

tion of Brodie method. Therefore, Hummers method is more suitable for preparing graphene. Although it was believed that the functional groups resulted in the layer loosening of graphite, which was demonstrated by atomic-force microscopy and X-ray diffraction

Low energy pure shear milling: A method for the

2006/12/1Graphite nano-sheets, having a thickness of the order of 10 nm, high shape asymmetry, and a well preserved crystalline order, have been prepared by a mechanical method based on the grinding of graphite powder under low energy pure shear milling using water as

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