Cost-effective fabrication of graphene-like nanosheets from natural microcrystalline graphite minerals by liquid oxidation–reduction method

Xie, Wei; Zhu, Xukun; Xu, Shenglong; Yi, Shihe; Guo, Zhanhu; Kuang, Jiacai; Deng, Yingjun

doi:10.1039/c7ra02171b

Cited by 13 publications

(5 citation statements)

References 47 publications

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“…In nature, there exist several magnetic ores consisting of naturally grown well‐oriented crystals. The exfoliation of these naturally occurring minerals has opened a new direction for the synthesis of 2D materials . Chromite is a representative of the naturally occurring oxide minerals on Earth belonging to the spinel group with general formula AB 2 O 4 (FeCr 2 O 4 ), where divalent A 2+ (Fe 2+ ) ions occupy tetrahedral sites and trivalent B 3+ (Cr 3+ ) ions occupy octahedral sites .…”

Section: The Structural Optimization Lattice Constant Of the Surface mentioning

confidence: 99%

Chromiteen: A New 2D Oxide Magnetic Material from Natural Ore

Yadav

Shirodkar

Lertcumfu

et al. 2018

Adv Materials Inter

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like graphene, hexagonal boron nitride (hBN), MX 2 (M = M, W and X = S, Se), black phosphorus, and many more. 2D materials with a tunable bandgap and high carrier mobility along with magnetic properties can be utilized in magnetoelectric and magnetic storage media. [8][9][10][11] According to the Mermin-Wagner [12] theorem, long-range magnetic ordering should be absent in 1D or 2D systems because of strong thermal fluctuations. However, the thermal fluctuations in 2D magnetic materials can be controlled by creating imperfections and also by chemical functionalization. [8] Recently, a chemical functionalization approach was used for fluorinating hexagonal boron nitride (h-BN) 2D flake, where a roomtemperature weak ferromagnetism was discovered. [8] Apart from that, most of the 2D magnetic materials were prepared through surface deposition or peeling, that is, defect-induced magnetism arising out of vacancies at grain boundaries, or adatoms of other elements binding with major group elements at the edges, or by adding magnetic elements through substitution or exchange interaction. [13][14][15][16] Recently, an exciting study showing the intrinsic The absence of inherent magnetism in the family of 2D materials limits its application in magnetoelectric and magnetic storage media. Here, a simple scalable route for the synthesis of magnetic 2D material chromite (chromiteen) via sonication-assisted liquid-phase exfoliation is demonstrated. The (111) plane of the exfoliated chromite is found to be the most stable which is confirmed by its common occurrence in exfoliation. Further, the stability and dispersion are verified by ab initio density functional theoretical simulations. Magnetic measurements over a large temperature range of 4 K ≤ T ≤ 300 K confirm ferromagnetic/superparamagnetic order with nearly 40 times higher magnetic moment saturation in chromiteen compared to chromite. The results reveal that 2D chromiteen causes a change in the magnetic behavior with respect to chromite which could be ascribed to the increase in the lattice strain as well as a magnetic strain due to high ferromagnetic fraction in 2D plane.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/admi.201800549.The last decade of materials based research has produced many atomically thin 2D materials, which exhibit extraordinary physical, chemical, optical, and mechanical properties, and find uses in sensor, biomedical, environmental, and energy applications. [1][2][3][4][5][6][7] In the 2D materials family, major research efforts have been focused toward van der Waals solids

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Section: The Structural Optimization Lattice Constant Of the Surface mentioning

confidence: 99%

Chromiteen: A New 2D Oxide Magnetic Material from Natural Ore

Yadav

Shirodkar

Lertcumfu

et al. 2018

Adv Materials Inter

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“…The recent progress in synthetic strategies of 2D nanosheets were summarized by Yang et al, and approaches to the assembly of 2D nanosheets into 3D architectures were demonstrated by Shen et al [ 111 , 112 ]. Nowadays, graphene sheets are commercially available [ 113 ]. For example, GO can be bought from Aladdin ® (Shanghai, China) [ 85 ].…”

Section: Cost Fabrication and Limitationmentioning

confidence: 99%

Applications of Nanosheets in Frontier Cellular Research

et al. 2018

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Several types of nanosheets, such as graphene oxide (GO) nanosheet, molybdenum disulfide (MoS2) and poly(l-lactic acid) (PLLA) nanosheets, have been developed and applied in vitro in cellular research over the past decade. Scientists have used nanosheet properties, such as ease of modification and flexibility, to develop new cell/protein sensing/imaging techniques and achieve regulation of specific cell functions. This review is divided into three main parts based on the application being examined: nanosheets as a substrate, nanosheets as a sensitive surface, and nanosheets in regenerative medicine. Furthermore, the applications of nanosheets are discussed, with two subsections in each section, based on their effects on cells and molecules. Finally, the application prospects of nanosheets in cellular research are summarized.

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“…At present, microcrystalline graphite is mainly used in low-end fields such as pencil lead and carburant for steelmaking. Recently, microcrystalline graphite is adopted to develop numerous products such as anode materials [19,20], electromagnetic absorbers [21], graphene nanosheets [22][23][24][25][26][27] and refractories [28,29]. However, it is difficult to achieve largescale application of microcrystalline graphite in the short term because of some technical barriers to break through.…”

Section: Introductionmentioning

confidence: 99%