Journal ArticleDOI
Water-Dispersible Magnetite-Reduced Graphene Oxide Composites for Arsenic Removal
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TLDR
The magnetite-graphene hybrids show a high binding capacity for As(III) and As(V), whose presence in the drinking water in wide areas of South Asia has been a huge problem.Abstract:
Magnetite−graphene hybrids have been synthesized via a chemical reaction with a magnetite particle size of ∼10 nm. The composites are superparamagnetic at room temperature and can be separated by an external magnetic field. As compared to bare magnetite particles, the hybrids show a high binding capacity for As(III) and As(V), whose presence in the drinking water in wide areas of South Asia has been a huge problem. Their high binding capacity is due to the increased adsorption sites in the M−RGO composite which occurs by reducing the aggregation of bare magnetite. Since the composites show near complete (over 99.9%) arsenic removal within 1 ppb, they are practically usable for arsenic separation from water.read more
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Functionalization of Graphene: Covalent and Non-Covalent Approaches, Derivatives and Applications
Vasilios Georgakilas,Michal Otyepka,Athanasios B. Bourlinos,Vimlesh Chandra,Namdong Kim,K. Christian Kemp,Pavel Hobza,Pavel Hobza,Pavel Hobza,Radek Zboril,Kwang S. Kim +10 more
TL;DR: Approaches, Derivatives and Applications Vasilios Georgakilas,† Michal Otyepka,‡ Athanasios B. Bourlinos,† Vimlesh Chandra, Namdong Kim, K. Kim,§,⊥ Radek Zboril,*,‡ and Kwang S. Kim.
Journal ArticleDOI
Graphene based materials: Past, present and future
TL;DR: Graphene and its derivatives are being studied in nearly every field of science and engineering as mentioned in this paper, and recent progress has shown that the graphene-based materials can have a profound impact on electronic and optoelectronic devices, chemical sensors, nanocomposites and energy storage.
Journal ArticleDOI
Noncovalent Functionalization of Graphene and Graphene Oxide for Energy Materials, Biosensing, Catalytic, and Biomedical Applications
Vasilios Georgakilas,Jitendra N. Tiwari,K. Christian Kemp,Jason A. Perman,Athanasios B. Bourlinos,Kwang S. Kim,Radek Zboril +6 more
TL;DR: This Review focuses on noncovalent functionalization of graphene and graphene oxide with various species involving biomolecules, polymers, drugs, metals and metal oxide-based nanoparticles, quantum dots, magnetic nanostructures, other carbon allotropes, and graphene analogues.
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Few-Layered Graphene Oxide Nanosheets As Superior Sorbents for Heavy Metal Ion Pollution Management
TL;DR: The graphene oxide nanosheets may be suitable materials in heavy metal ion pollution cleanup if they are synthesized in large scale and at low price in near future.
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3D Graphene–Cobalt Oxide Electrode for High-Performance Supercapacitor and Enzymeless Glucose Detection
Xiaochen Dong,Hang Xu,Xuewan Wang,Yinxi Huang,Mary B. Chan-Park,Hua Zhang,Lianhui Wang,Wei Huang,Peng Chen +8 more
TL;DR: The 3D graphene/Co(3)O(4) composite was used as the monolithic free-standing electrode for supercapacitor application and for enzymeless electrochemical detection of glucose and it is demonstrated that it is capable of delivering high specific capacitance and detecting glucose with a ultrahigh sensitivity.
References
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Journal ArticleDOI
Tuning the graphene work function by electric field effect.
TL;DR: In this paper, a variation of the work function for single and bilayer graphene devices measured by scanning Kelvin probe microscopy (SKPM) is reported, by using the electric field effect, which can be adjusted as the gate voltage tunes the Fermi level across the charge neutrality point.
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Low-Field Magnetic Separation of Monodisperse Fe3O4 Nanocrystals
Cafer T. Yavuz,J. T. Mayo,William W. Yu,Arjun Prakash,Joshua C. Falkner,Sujin Yean,Lili Cong,Heather J. Shipley,Amy T. Kan,Mason B. Tomson,Douglas Natelson,Vicki L. Colvin +11 more
TL;DR: Using the high specific surface area of Fe3O4 NCs that were 12 nanometers in diameter, the mass of waste associated with arsenic removal from water was reduced by orders of magnitude and the size dependence of magnetic separation permitted mixtures of 4- and 12-nanometer–sized Fe3Os to be separated by the application of different magnetic fields.
Journal ArticleDOI
Tuning the graphene work function by electric field effect
TL;DR: Variation of the work function for single and bilayer graphene devices measured by scanning Kelvin probe microscopy (SKPM) is reported, by use of the electric field effect.
Journal ArticleDOI
Palladium Nanoparticles on Graphite Oxide and Its Functionalized Graphene Derivatives as Highly Active Catalysts for the Suzuki−Miyaura Coupling Reaction
TL;DR: In contrast to the conventional Pd/C catalyst, graphite oxide and graphene-based catalysts gave much higher activities with turnover frequencies exceeding 39,000 h(-1), accompanied by very low palladium leaching (<1 ppm).
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Superparamagnetic graphene oxide–Fe3O4nanoparticles hybrid for controlled targeted drug carriers
TL;DR: In this paper, a superparamagnetic graphene oxide-Fe3O4nanoparticles hybrid was prepared via a simple and effective chemical precipitation method, which was then loaded with doxorubicin hydrochloride (DXR) and the loading capacity was as high as 1.08 mg mg−1.6 wt% by atomic absorption spectrometry.