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MoS2–graphene oxide (GO) hybrids of different compositions were prepared in the form of a few micron thick flexible paper by a simple ambient condition evaporation of a mixture of colloidal dispersions of ammoniated MoS2 and GO. These, on thermal reduction at 400 °C, convert to MoS2–reduced graphene oxide (rGO) hybrids, retaining the macroscopic paper-like structure. These hybrids act as efficient...
Flow-induced orientation of discotic mesophase precursor typically leads to a center-origin, radial microstructure in the resulting carbon fibers. In the present study, we report the microstructure of carbon fibers that were derived from mesophase pitch that was modified using carbon multi-wall nanotubes (MWNTs). For an MWNT content as low as 0.1 wt.%, the microstructure was found to be fairly random...
This paper presents the development and validation of a computational scheme for an analysis of activated charcoal-nitrogen adsorption cryocoolers. Using this procedure a comparative analysis of four samples of charcoal is carried out. It is shown that the specific power (SP) of the cryocooler is governed by the packing density achievable in addition to the charcoal adsorption characteristics, cycle...
Adsorption isotherms are obtained for the charcoal-nitrogen system in the temperature range 79-320 K and pressures to 5 MPa for two samples of activated charcoal. Correlations relating temperature dependence of adsorption potential are obtained using four methods of extrapolating pseudo-saturation state beyond the critical point. The values obtained are compared with literature data. Using the...
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