High-yield production of graphene by liquid-phase exfoliation of graphite
Yenny Hernandez,Valeria Nicolosi,Mustafa Lotya,Fiona M. Blighe,Zhenyu Sun,Sukanta De,I.T. McGovern,Brendan Holland,Michele T. Byrne,Yurii K. Gun'ko,John J. Boland,Peter Niraj,Georg S. Duesberg,Satheesh Krishnamurthy,Robbie Goodhue,John L. Hutchison,Vittorio Scardaci,Andrea C. Ferrari,Jonathan N. Coleman +18 more
TLDR
Graphene dispersions with concentrations up to approximately 0.01 mg ml(-1), produced by dispersion and exfoliation of graphite in organic solvents such as N-methyl-pyrrolidone are demonstrated.Abstract:
Fully exploiting the properties of graphene will require a method for the mass production of this remarkable material. Two main routes are possible: large-scale growth or large-scale exfoliation. Here, we demonstrate graphene dispersions with concentrations up to approximately 0.01 mg ml(-1), produced by dispersion and exfoliation of graphite in organic solvents such as N-methyl-pyrrolidone. This is possible because the energy required to exfoliate graphene is balanced by the solvent-graphene interaction for solvents whose surface energies match that of graphene. We confirm the presence of individual graphene sheets by Raman spectroscopy, transmission electron microscopy and electron diffraction. Our method results in a monolayer yield of approximately 1 wt%, which could potentially be improved to 7-12 wt% with further processing. The absence of defects or oxides is confirmed by X-ray photoelectron, infrared and Raman spectroscopies. We are able to produce semi-transparent conducting films and conducting composites. Solution processing of graphene opens up a range of potential large-area applications, from device and sensor fabrication to liquid-phase chemistry.read more
Citations
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Dimension-tailored functional graphene structures for energy conversion and storage
TL;DR: This feature article focuses on some of the recent work of dimension-tailed graphene contributed by us and others, and reviews the current trends in the tunable and controllable preparation of functionalized graphene architectures ranging from zero-dimensional quantum dots to three-dimensional networks.
Journal ArticleDOI
High-Yield Production of Monolayer FePS3 Quantum Sheets via Chemical Exfoliation for Efficient Photocatalytic Hydrogen Evolution.
Zhongzhou Cheng,Zhongzhou Cheng,Tofik Ahmed Shifa,Tofik Ahmed Shifa,Fengmei Wang,Yi Gao,Yi Gao,Peng He,Kai Zhang,Chao Jiang,Quanlin Liu,Jun He,Jun He +12 more
TL;DR: This study presents a facile way, for the first time, of producing uniform monolayer FePS3 quantum sheets (QSs) and opens up new avenues for designing other low-dimensional materials based on MPX3.
Journal ArticleDOI
Harnessing the Liquid‐Phase Exfoliation of Graphene Using Aliphatic Compounds: A Supramolecular Approach
Artur Ciesielski,Sébastien Haar,Mirella El Gemayel,Huafeng Yang,Joseph Clough,Georgian Melinte,Marco Gobbi,Emanuele Orgiu,Marco Vittorio Nardi,Giovanni Ligorio,Vincenzo Palermo,Norbert Koch,Norbert Koch,Ovidiu Ersen,Cinzia Casiraghi,Paolo Samorì +15 more
TL;DR: A simple method is reported for producing homogenous dispersions of unfunctionalized and non-oxidized graphene nanosheets in N-methyl-2-pyrrolidone (NMP) by using simple molecular modules, which act as dispersion-stabilizing compounds during the liquid-phase exfoliation (LPE) process, leading to an increase in the concentration of graphene in dispersions.
Journal ArticleDOI
Flash Graphene from Plastic Waste.
Wala A. Algozeeb,Paul E Savas,Duy Xuan Luong,Weiyin Chen,Carter Kittrell,Mahesh Bhat,Rouzbeh Shahsavari,James M. Tour +7 more
TL;DR: This work relies on flash Joule heating (FJH) to convert PW into flash graphene (FG) and shows a low toxicity profile, which could be an environmentally beneficial method to upcycle PW.
Journal ArticleDOI
Quantum dots as enhancer in photocatalytic hydrogen evolution: A review
TL;DR: In this paper, the importance of quantum dots in water splitting along with the general mechanism involved in the process is discussed, and the enhancement of different materials like metal oxides, layered double hydroxides (LDH), carbonaceous materials (g-C3N4, benzene and benzene like materials) by QDs have been discussed in the field of water splitting.
References
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Journal ArticleDOI
Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide
Sasha Stankovich,Dmitriy A. Dikin,Richard D. Piner,Kevin A. Kohlhaas,Alfred Kleinhammes,Yuanyuan Jia,Yue Wu,SonBinh T. Nguyen,Rodney S. Ruoff +8 more
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