nitrogen-doped graphene by ball-milling graphite with melamine for energy conversion and

Catalyst

The electronic and chemical properties of graphene can be modulated by chemical doping foreign atoms and functional moieties. The general approach to the synthesis of nitrogen-doped graphene (NG), such as chemical vapor deposition (CVD) performed in gas phases, requires transitional metal catalysts which could contaminate the resultant products and thus affect their properties. In this paper

Nitrogen

2015/12/1N-doped graphene was prepared by ball milling of graphite with melamine. It was found that ball-milling reduced the size of graphite particles from 30 to 1 μm and facilitated the exfoliation of the resultant small particles into few-layer N-doped graphene nanosheets under ultrasonication. The as-prepared N-doped graphene nanoplatelets (NGnPs) exhibited a nitrogen content as high as 11.4 at

One

2016/1/6An improved method for mass production of good-quality graphene nanosheets (GNs) via ball milling pristine graphite with dry ice is presented. We also report the enhanced performance of these GNs as working electrode in lithium-ion batteries (LIBs). In this improved method, the decrease of necessary ball milling time from 48 to 24nbsp;h and the increase of Brunauer–Emmett–Teller

Plasma Treated Nitrogen

2020/8/1Xue et al. synthesized the nitrogen-doped graphene by using ball milling with melamine and reported the nitrogen content as high as 11.4 at%. Our group recently demonstrated that plasma treated nitrogen-doped graphite [24] and graphite oxide [25] by using ammonium hydroxide exhibited improved capacitance as well as specific energy with 10 at% of nitrogen content.

Direct nitrogen fixation at the edges of graphene nanoplatelets as efficient electrocatalysts for energy conversion

Direct nitrogen fixation at the edges of graphene nanoplatelets as efficient electrocatalysts for energy conversion In-Yup Jeon1*, Hyun-Jung Choi1*, Myung Jong Ju2*, In Taek Choi2, Kimin Lim 3, Jaejung Ko, Hwan Kyu Kim2, Jae Cheon Kim 4, Jae-Joon Lee, Dongbin Shin 1, Sun-Min Jung1, Jeong-Min Seo,

Promotion of the performance of nitrogen

2019/7/2The binding energy of H adsorbed on the different binding sites on pristine graphene (Fig. 10a), S-doped graphene, and N-doped graphene was calculated. For N-doped graphene, the charge density of the N–H bond diminished because of spilling of electrons to the neighboring C atoms (blue symbols in Fig. 10b ), while the charge density increases only on C atoms nearby N doping atoms

Investigations of Graphene and Nitrogen

2021/4/1N-G was synthesized through ball milling of graphite and melamine as the nitrogen precursor using a planetary ball-mill machine (Emax, Restch, Haan, Germany) (Figure 1). 0.5 g of graphite and 0.25 g of melamine were added into a stainless-steel grinding jar 2

Synthesis of few

Abstract: In this paper, we introduced a novel method to prepare the few-layer nitrogen-doped graphene (FNG) from expandable graphite with melamine. The super-capacitive properties of FNG were thoroughly characterized by a three-electrode system, and the results showed the FNG electrode achieved a specific capacitance as high as 83.8 mF/cm 2 together with excellent cycling stability.

Scalable Production of Edge‐Functionalized Graphene

Corresponding Author School of Energy and Chemical Engineering, Center for Dimension‐Controllable Organic Frameworks, Ulsan National Institute of Science and Technology (UNIST), 50, UNIST, Ulsan, 689–798 Korea E‐mail: inyupunist.ac.kr, jbbaekunist.ac.kr Search for more papers by this author

Edgefunctionalized graphene nanoplatelet towards

Previously, N-doped graphene materials generated by ball milling of graphite with N-containing gases like N2 and NH3 have been showed good electro catalytic activities for oxygen reduction reaction (ORR). [4,5,6] But,the amount of Nirogen doping is not

Promotion of the performance of nitrogen

2019/7/2The binding energy of H adsorbed on the different binding sites on pristine graphene (Fig. 10a), S-doped graphene, and N-doped graphene was calculated. For N-doped graphene, the charge density of the N–H bond diminished because of spilling of electrons to the neighboring C atoms (blue symbols in Fig. 10b ), while the charge density increases only on C atoms nearby N doping atoms

Promotion of the performance of nitrogen

It has been proved that doping with nitrogen can significantly enhance the electrochemical properties of GR. Recently, more researches have shown that modifying the nitrogen-doped GR (N-GR) further by introducing a second heteroatom, such as boron, sulfur, and phosphorus, greatly improved electrochemical properties which could be obtained compared with mono-nitrogen-doped GR.

Heteroatom doped graphene materials: syntheses, properties and applications

4 energy storage and conversion,5-7 and biomedical research.8-10 Tremendous efforts are still ongoing to uncover the full potential of graphene and its derivatives. The fantastic properties of pristine graphene (single-atom-thick layer of sp 2 bonded carbon atoms

Graphene Phosphonic Acid as an Efficient Flame Retardant

KIM ET AL. VOL. 8 ' NO. 3 ' 2820 – 2825 ' 2014 2820 February 27, 2014 C 2014 American Chemical Society Graphene Phosphonic Acid as an Efficient Flame Retardant Min-Jung Kim, †, In-Yup Jeon, Jeong-Min Seo,† Dai,‡,* and Jong-Beom Baek†,*

Heteroatom doped graphene materials: syntheses, properties and applications

4 energy storage and conversion,5-7 and biomedical research.8-10 Tremendous efforts are still ongoing to uncover the full potential of graphene and its derivatives. The fantastic properties of pristine graphene (single-atom-thick layer of sp 2 bonded carbon atoms

Atomic dispersion of Fe/Co/N on graphene by ball

2018/5/31Nitrogen-doped graphene by ball-milling graphite with melamine for energy conversion and storage 2D Mater, 2 (2015) 044001 Google Scholar M. Zhang, L. Liu, T. He, G. Wu, P. Chen Melamine assisted solid exfoliation approach for the synthesis of few-layered,

Investigation of wet

2020/2/22In this work, sulfur-doped graphene nanosheets (SGNS) were fabricated by wet ball milling pristine graphite with carbon disulfide (CS 2).With the presence of liquid CS 2, pristine graphite was easily infiltrated and exfoliated to graphene nanosheets, and sulfur atom was successfully doped onto the surface of graphene nanosheets.. The as-prepared SGNS with sulfur doping content (12.49 wt

Nitrogen

2017/2/28Nitrogen-doped graphene nanosheets (NGNS) are prepared by a novel mechanochemical method via all-solid-state ball-milling graphite with urea. The ball-milling process does not only successfully exfoliate the graphite into multi-layer (10 layers) graphene nanosheets, but at the same time, enables the N element to be doped onto the graphene.

ball milling method for graphite

PAPER Nitrogen doped graphene by ball milling graphite graphene by ball milling graphite with melamine. In a typical experiment, graphite was mixed with melamine at a weight ratio of 110 prior to the ball milling. As can be seen in Scheme 1b, the resulted N

Nitrogen and phosphorus dual

To address the concerned issues, we report a facile strategy for engineering the nitrogen and phosphorus dual-doped graphene (NPG) via an efficient ball-milling process, followed by a simple thermal annealing approach utilizing melamine (C 3 H 6 N 6 6 H 5) 3

Recent advances in graphene‐based materials for fuel cell

2.1 Properties of graphene Graphene has a large theoretical surface area of 2630 m 2 g −1, which is about two orders of magnitude larger than that of graphite powder (~10 m 2 g −1). 10 The two‐dimensional (2D) morphology of graphene‐based materials with the large surface area may have strong adsorption capacity to the reactants by strong interactions with π electrons, allowing to use

Nitrogen

2017/2/28Nitrogen-doped graphene nanosheets (NGNS) are prepared by a novel mechanochemical method via all-solid-state ball-milling graphite with urea. The ball-milling process does not only successfully exfoliate the graphite into multi-layer (10 layers) graphene nanosheets, but at the same time, enables the N element to be doped onto the graphene.

Nitrogen and phosphorus dual

To address the concerned issues, we report a facile strategy for engineering the nitrogen and phosphorus dual-doped graphene (NPG) via an efficient ball-milling process, followed by a simple thermal annealing approach utilizing melamine (C 3 H 6 N 6 6 H 5) 3

Journal of Ma terials Chemistry A

achieve nitrogen-doped few-layered graphene. The synthetic procedure is illustrated in Figure 1. Firstly, GH particles were intercalated between the graphite layers thanks to kinetic energy provided by ball milling to cause edge-opened graphite. It was

A novel approach to synthesize nitrogen

2020/12/1Systematic report on the synthesis of Nitrogen-doped graphene (N-doped GNP) via solid-state ball milling of graphite with melamine powder is represented in the article. At the first time, the article briefs the mathematical representation for energy released at different speed of rotation of planetary ball mill using the various diameter of balls.

Mechanochemical Routes to Functionalized Graphene

As compared to thermally reduced graphite oxide (TRGO), N ‐doped graphene sheets obtained by dry ball‐milling graphite under nitrogen as well as multilayer graphene derived from graphite intercalates represent more cost efficient carbon nanofillers for epoxy 140

One

2016/1/6An improved method for mass production of good-quality graphene nanosheets (GNs) via ball milling pristine graphite with dry ice is presented. We also report the enhanced performance of these GNs as working electrode in lithium-ion batteries (LIBs). In this improved method, the decrease of necessary ball milling time from 48 to 24 h and the increase of Brunauer–Emmett–Teller surface area

Mechanochemical Routes to Functionalized Graphene Nanofillers Tuned for

and nitrogen co-doped graphene dispersions when using melamine together with ammonium sulfate as electrolyte.[47] By simultaneous graphite exfoliation and graphene function-alization a multifunctional flame retardant containing phosp-hazene rings and[48]

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