Halogenated graphene derivatives are interesting owing to their outstanding physical and chemical properties. In this paper, we present various methods for the synthesis of iodinated graphene derivatives by the iodination of graphite oxides prepared according to either the Hummers or Hofmann method. Both graphite oxides were iodinated by iodine or hydroiodic acid under reflux or in an autoclave...

Carbon deposition due to the inverse Boudouard reaction (2CO → CO2 + C) has been studied on yttria-stabilized zirconia (YSZ), Y2O3, and ZrO2 in comparison to CH4 by a variety of different chemical, structural, and spectroscopic characterization techniques, including electrochemical impedance spectroscopy (EIS), Fourier-transform infrared (FT-IR) spectroscopy and imaging, Raman spectroscopy, and...

Lithium-ion batteries (LIBs) have been intensively studied to meet the increased demands for the high energy density of portable electronics and electric vehicles. The low specific capacity of the conventional graphite based anodes is one of the key factors that limit the capacity of LIBs. Transition metal oxides, such as NiO, MnO2 and Fe3O4, are known to be promising anode materials that are e...

a simple, highly sensitive, accurate and selective method for determination of trace amounts of pb(ii) in water samples is presented. a novel graphene oxide with covalently linked porphyrin solid-phase extraction adsorbent was synthesized by covalently linked porphyrin onto the surfaces of graphite oxides. the stability of a chemically (go-h2p) especially in concentrated hydrochloric acid was s...

Introduction: O-rich stardust grains found in primitive meteorites provide information about a wide range of astrophysical environments. Based on their O isotopic ratios, these grains can be placed into discrete groups, thought to reflect distinct stellar sources [1], such as low-mass AGB stars and supernovae (SNe). However, measurements of sub-μm presolar oxides have revealed sub-populations w...

A simple, highly sensitive, accurate and selective method for determination of trace amounts of Pb(II) in water samples is presented. A novel Graphene oxide with covalently linked porphyrin solid-phase extraction adsorbent was synthesized by covalently linked porphyrin onto the surfaces of graphite oxides. The stability of a chemically (GO-H2P) especially in concentrated hydrochloric acid was s...

Aluminum and its alloys have a lot of industrial applications due to their appropriate physical and chemical characteristics. However, those present a modest mechanical performance. One method to improve its strenght is the addition of hard insoluble particles as: carbides (Al4C3, TiC), oxides (Al2O3) or nitrides (TiN, AlN), which can difficult the dislocation movement at atomic level, resultin...

A series of chromium oxides (Cr2O3) nanoparticles supported on different carbonaceous material, namely: graphene, graphene oxide (GO) and graphite, were synthetized by precipitation the salt precursors with precipitant (ammonia) subsequent thermal treatment. The catalytic activity these composites Cr2O3 have been analysed Koutecky-Levich (KL) rotating ring-disc electrode methods results discuss...