1. A FACILE SYNTHESIS OF POROUS HEMATITE NANOMATERIALS AND THEIR FAST SORPTION OF CR (VI) IN WASTEWATER
- Author
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Xie Jingsong, Chonghai Deng, Chengliang Han, and Difang Zhao
- Subjects
Aqueous solution ,Materials science ,Nanoparticle ,Sorption ,Nanotechnology ,General Chemistry ,Hematite ,Evaporation (deposition) ,Nanomaterials ,chemistry.chemical_compound ,Adsorption ,chemistry ,Chemical engineering ,visual_art ,visual_art.visual_art_medium ,Hydroxide - Abstract
Porous hematite (α-Fe 2 O 3 ) 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 α-Fe 2 O 3 particles at 180°C for 2h or so are nearly spindle in shape. Each of α-Fe 2 O 3 microspindles is made of many ultrafine α-Fe 2 O 3 nanoparticles and results in a porous structure. The as-prepared porous α-Fe 2 O 3 powders have higher surface area (~78m 2 /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. Keywords: Hematite, Thermal evaporation, Porous structure, Removal of Cr (VI) e-mail: hfuuhan@163.com 1. For Cr (VI) -adsorption: The aqueous solutions with constant Cr (VI) INTRODUCTION The design and synthesis of various morphologies nanostructures have been important research subjects in nanoscience and nanotechnology due to their unique size and shape-dependent chemical and physical properties. Nanosturctured hematite (α-Fe
- Published
- 2012
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