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In order to detect DMMP (dimethyl methyl-phosphonate; sarin simulant), tetrafluorohydroquinone (TFQ) functionalized graphene chemiresistive sensors are successfully developed. The graphene sensors show significantly enhanced sensitivity with various DMMP concentrations. In addition, for the real-time DMMP detection, a method using the first derivative of current sensitivity will be presented.
Nobel metal-free electrocatalysts for hydrogen evolution reaction (HER) with high activity and low cost are essential for hydrogen production. However, the design and fabrication of such catalysts are still highly challenging thus far. In this work, we fabricate a three-dimensional (3D) hybrid electrocatalyst by decorating N-doped graphene hydrogel film (NG) with molecular clusters (MoSx). This material...
Graphene wrapped Fe 3 O 4 hollow nanospheres are synthesized via a simple self-assembly process driven by electrostatic interaction. The nanocomposites are characterized by XRD, SEM, TEM, HRTEM, FTIR, cyclic voltammogram and galvanostatic charge/discharge tests. The results demonstrate that the graphene-wrapped Fe 3 O 4 hollow nanospheres present excellent cycling stability...
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