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.
Journal ArticleDOI
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.
Journal ArticleDOI
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
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TL;DR: First-principles simulations predict that spin-valve devices based on graphene nanoribbons will exhibit magnetoresistance values that are thousands of times higher than previously reported experimental values and it is shown that it is possible to manipulate the band structure of the nan oribbons to generate highly spin-polarized currents.
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Exfoliation of Graphite Oxide in Propylene Carbonate and Thermal Reduction of Resulting Graphene Oxide Platelets
TL;DR: In this article, a 2-cell ultracapacitor with specific capacitance values of about 120 F/g was obtained by adding TEA BF 4 to the reduced graphene oxide/propylene carbonate slurry.
Journal ArticleDOI
Arsenic removal using mesoporous alumina prepared via a templating method.
TL;DR: In this article, mesoprous alumina (MA) with a wide surface area (307 m2/g) and uniform pore size (3.5 nm) was prepared, and a spongelike interlinked pore system was developed through a post-hydrolysis method.
Journal ArticleDOI
Adsorption of arsenite and arsenate within activated alumina grains: Equilibrium and kinetics
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TL;DR: The agreement among the models and experimental data indicated that the adsorption and diffusion of arsenate and arsenite can be simulated by the proposed model.
Journal ArticleDOI
Near-Surface Wetland Sediments as a Source of Arsenic Release to Ground Water in Asia
TL;DR: The observation of strong hydrologic influence on arsenic behaviour indicates that release and transport of arsenic are sensitive to continuing and impending anthropogenic disturbances, which will alter the hydraulic regime and/or arsenic source material and, by extension, influence groundwater arsenic concentrations and the future of this health problem.