Journal ArticleDOI
Water-Dispersible Magnetite-Reduced Graphene Oxide Composites for Arsenic Removal
Reads0
Chats0
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
More filters
Journal ArticleDOI
Ultra-long magnetic nanochains for highly efficient arsenic removal from water
Gautom Kumar Das,Cecile S. Bonifacio,Julius de Rojas,Kai Liu,Klaus van Benthem,Ian M. Kennedy +5 more
TL;DR: The ultra-long γ-Fe2O3 nanochains possess high surface area, large saturation magnetization that aids in their gas phase self-assembly into long chains in an external magnetic field, along with an extraordinary arsenic removal capacity and exhibited a relatively low-pressure drop and very little break-through of the iron oxide across the filter.
Journal ArticleDOI
One-pot hydrothermal synthesis of rGO-Fe3O4 hybrid nanocomposite for removal of Pb(II) via magnetic separation
TL;DR: In this paper, the reduced graphene oxide-Fe3O4(rGO-Fe 3O4) hybrid nanocomposite was prepared via a one-pot facile hydrothermal method for adsorption of heavy metal ions.
Journal ArticleDOI
Polyoxometalate@magnetic graphene as versatile immobilization matrix of Ru(bpy)32+ for sensitive magneto-controlled electrochemiluminescence sensor and its application in biosensing
Jing Qian,Kun Wang,Yicong Jin,Xingwang Yang,Ling Jiang,Yuting Yan,Xiaoya Dong,Huaming Li,Baijing Qiu +8 more
TL;DR: The exploration of polyoxometalate coated magnetic Fe3O4/reduced graphene oxide (POM@mrGO) composite as the versatile immobilization matrix for the electrochemiluminescence (ECL) agent Ru(bpy)3(2+) shows that such sensing strategy combines enzymatic selectivity with simple sensor preparation can be used as a new and biocompatible platform for dehydrogenase-based ECL biosensing.
Journal ArticleDOI
Electrostatic droplets assisted in situ synthesis of superparamagnetic chitosan microparticles for magnetic-responsive controlled drug release and copper ion removal
Chih-Yu Wang,Chih Hui Yang,Keng-Shiang Huang,Chen-Sheng Yeh,Andrew H.-J. Wang,Chih Hsin Chen +5 more
TL;DR: The results show that the superparamagnetic chitosan particles achieved superior results in magnetic-responsive drug release as well as heavy metal removal (e.g. copper ions) and allowed for better application of microcapsules as a smart drug carrier.
Journal ArticleDOI
Enhancing the Hg(II) Removal Efficiency from Real Wastewater by Novel Thymine-Grafted Reduced Graphene Oxide Complexes
TL;DR: In this article, the reduced graphene oxide-thymine composite (rGO-Thy) exhibits a higher Hg(II) adsorption capacity and selectivity compared with rGO as the functional group of thymine shows a strong affinity toward Hg.
References
More filters
Journal ArticleDOI
Electric Field Effect in Atomically Thin Carbon Films
Kostya S. Novoselov,Andre K. Geim,Sergey V. Morozov,Da Jiang,Y. Zhang,S. V. Dubonos,Irina V. Grigorieva,A. A. Firsov +7 more
TL;DR: Monocrystalline graphitic films are found to be a two-dimensional semimetal with a tiny overlap between valence and conductance bands and they exhibit a strong ambipolar electric field effect.
Journal ArticleDOI
The adsorption of gases on plane surfaces of glass, mica and platinum.
TL;DR: In this article, the absorption index at the wave length of the band maximum was found to be proportional to the total concentration of metal at shorter wave lengths, however, deviations were observed, the absorption increasing more rapidly with concentration than Beers' law would demand.
Journal ArticleDOI
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.