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
Citations
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One pot synthesis of tunable Fe3O4–MnO2 core–shell nanoplates and their applications for water purification
TL;DR: In this paper, a one-pot, low-cost and environmentally-friendly approach for fabrication of tunable Fe3O4-MnO2 core-shell nanoplates at ambient temperature and pressure was proposed.
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Efficient capture of strontium from aqueous solutions using graphene oxide–hydroxyapatite nanocomposites
TL;DR: The results herein reveal that the GO-HAp nanocomposites had exceptional potential as a suitable material for preconcentration and solidification of radiostrontium from large volumes of aqueous solutions in nuclear waste management and radiOSTrontium pollution cleanup.
Journal ArticleDOI
Synthesis of Manganese Ferrite/Graphene Oxide Nanocomposites for Biomedical Applications
Erwin Peng,Eugene Shi Guang Choo,Prashant Chandrasekharan,Chang-Tong Yang,Jun Ding,Kai-Hsiang Chuang,Junmin Xue +6 more
TL;DR: It is demonstrated that the loading of magnetic nanocrystals can be tuned by varying the ratio of graphene oxide/magnetic nanoparticles, and MGONCs are promising as magnetic resonance imaging (MRI) T(2) contrast agents.
Journal ArticleDOI
Fabrication of porous graphene-Fe3O4 hybrid composites with outstanding microwave absorption performance
TL;DR: In this paper, porous graphene was successfully prepared via pyrolysis process, and the minimum reflection loss (RL) value reached −48 dB at 9.8 GHz and −53 dB at 5.4 GHz with the thickness of 6.1mm.
Journal ArticleDOI
Arsenic transformation and adsorption by iron hydroxide/manganese dioxide doped straw activated carbon
TL;DR: In this paper, an iron hydroxide/manganese dioxide doped straw activated carbon was synthesized for As(III) adsorption, and it was well described by Langmuir isotherms model.
References
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Raman spectrum of graphene and graphene layers.
Andrea C. Ferrari,Jannik C. Meyer,Vittorio Scardaci,Cinzia Casiraghi,Michele Lazzeri,Francesco Mauri,S. Piscanec,Da Jiang,K. S. Novoselov,S. Roth,A. K. Geim +10 more
TL;DR: This work shows that graphene's electronic structure is captured in its Raman spectrum that clearly evolves with the number of layers, and allows unambiguous, high-throughput, nondestructive identification of graphene layers, which is critically lacking in this emerging research area.