Preparation of Ferrous/Polyacrylonitrile Composite Nanofibers by Electrostatic Spinning and Its Application for Cr(Ⅵ) Adsorption

Ferrous chloride/polyacrylonitrile composite nanofibers were prepared by electrostatic spinning, and applied to the determination of Cr(Ⅵ) in a solution. As shown by the results of SEM and BET analysis, the composite nanofibers obtained had an uniform morphology and structure and a large specific surface area of 14.0 m2·g-1 with diameters around 153 nm. The functional groups of PAN…Fe(Ⅱ)(OH)+ on the surface of the composite nanofibers behaved to adsorb and remove Cr(Ⅵ) ions from a solution quidkly, in the course of which Cr(Ⅵ) ions were reduced to Cr(Ⅲ). The results of the adsorption isotherm experiment showed that the data fitted well to the Langmuir isotherm model. The maximum amount of adsorption of Cr(Ⅵ) was found to be 54 mg·g-1. Under the maximum condition, 97% of Cr(Ⅵ) in the solution could be removed.