%0 Journal Article
%T A FACILE SYNTHESIS OF POROUS HEMATITE NANOMATERIALS AND THEIR FAST SORPTION OF CR (VI) IN WASTEWATER
%A CHENGLIANG HAN
%A JINGSONG XIE
%A CHONGHAI DENG
%A DIFANG ZHAO
%J Journal of the Chilean Chemical Society
%D 2012
%I Sociedad Chilena de Qu¨ªmica
%X Porous hematite (a-Fe2O3) nanomaterials can be simply acquired from amorphous iron (III) hydroxide (Fe (OH) 3) in neutral solution by an evaporation method in an open quartz flask in a vacuum drying oven. Results show that the as-obtained a-Fe2O3 particles at 180¡ãC for 2h or so are nearly spindle in shape. Each of a-Fe2O3 microspindles is made of many ultrafine a-Fe2O3 nanoparticles and results in a porous structure. The as-prepared porous a-Fe2O3 powders have higher surface area (~78m2/g) and can rapidly remove Cr (VI) ions in wastewater at room temperature. The model of the adsorption kinetic of Cr (VI) is best adapted to the pseudo second-order equation.
%K Hematite
%K Thermal evaporation
%K Porous structure
%K Removal of Cr (VI)
%U http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072012000400008