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AbstractAbstract
[en] Supercritical carbon dioxide is beneficial to the synthesis of superior ultrafine and uniform materials due to its high chemical stability, low viscosity, high diffusivity, and 'zero' surface tension. γ-Alumina nano-sheets were obtained by a simple hydrothermal route in the presence of supercritical carbon dioxide. XRD, FTIR, SEM, TEM and nitrogen sorption isotherm were employed to characterize the samples. Alumina as-prepared has a high specific surface area of up to 200 ± 6 m2 g-1, which presents a high adsorption capacity (4.66 ± 0.02 mg g-1) for uranyl ions from aqueous solution. Furthermore, the adsorption process was found to be endothermic and spontaneous in nature. (authors)
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Available from doi: http://dx.doi.org/doi:10.1039/c2nj40514h; 41 refs.
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ADSORPTION, ALUMINIUM OXIDES, CARBON DIOXIDE, CHEMICAL PREPARATION, FOURIER TRANSFORMATION, HYDROTHERMAL SYNTHESIS, INFRARED SPECTRA, MORPHOLOGY, NANOSTRUCTURES, SCANNING ELECTRON MICROSCOPY, SPECIFIC SURFACE AREA, SUPERCRITICAL STATE, TRANSMISSION ELECTRON MICROSCOPY, URANYL COMPOUNDS, WASTE WATER, X-RAY DIFFRACTION
ACTINIDE COMPOUNDS, ALUMINIUM COMPOUNDS, CARBON COMPOUNDS, CARBON OXIDES, CHALCOGENIDES, COHERENT SCATTERING, DIFFRACTION, ELECTRON MICROSCOPY, HYDROGEN COMPOUNDS, INTEGRAL TRANSFORMATIONS, LIQUID WASTES, MICROSCOPY, OXIDES, OXYGEN COMPOUNDS, PHYSICAL PROPERTIES, SCATTERING, SORPTION, SPECTRA, SYNTHESIS, TRANSFORMATIONS, URANIUM COMPOUNDS, WASTES, WATER
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