A FACILE SYNTHESIS OF POROUS HEMATITE NANOMATERIALS AND THEIR FAST SORPTION OF CR (VI) IN WASTEWATER

Journal of The Chilean Chemical Society

XIE, JINGSONG¹  HAN, CHENGLIANG²  DENG, CHONGHAI²  ZHAO, DIFANG² 

[1]Chinese Academy of Sciences, Hefei, China

[2]Hefei University, Hefei, China

关键词: Hematite;    Thermal evaporation;    Porous structure;    Removal of Cr (VI);   

DOI  :  10.4067/S0717-97072012000400008

学科分类：化学（综合）

来源: Sociedad Chilena de Quimica

【 摘 要 】

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.

【 授权许可】

Unknown