A facile synthesis of porous hematite nanomaterials and their fast sorption of cr (vi) in wastewater

• CHENGLIANG HAN ^[1] ; JINGSONG XIE ^[1] ; CHONGHAI DENG ^[1] ; DIFANG ZHAO ^[1]
  1. [1] Hefei University

     Hefei University

     China

     
• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 57, Nº. 4, 2012, págs. 1372-1374
• Idioma: inglés
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• Resumen

  • 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°C 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.