Ferrous oxalate, maghemite and hematite nanorods as efficient adsorbents for decontamination of Congo red dye from aqueous system|
Dhal, J. P.; Mishra, B. G. & Hota, G.
In this present study,we have synthesized ferrous
oxalate nanorods by a modified co-precipitation methods.The
obtained nanomaterial (ferrous oxalate nanorod) was calcined
at higher temperatures to form both maghemite and hematite
nanorods. The morphology, size, crystalline phases, formation
and surface area of the nanorods were characterized by
scanning electron microscope, transmission electron microscope,
X-ray diffraction, Fourier transform infrared spectroscope,
ultraviolet–visible diffuse reflectance spectroscope and
Brunauer–Emmett–Teller surface area analytical techniques.
The results showed that high-yield aligned nanorods with a
typical diameter of 100–200 nm and length up to micrometers
were formed. The obtained rod-shaped nanomaterials (i.e.,
ferrous oxalate, maghemite and hematite) were used as
adsorbents and were applied to remove Congo red (CR) dye
molecules,which was used as amodel of organic pollutants in
aqueous solution. The adsorption isotherms and kinetics of
removal of CR were studied. It was found that the adsorption
capacity of maghemite nanorod is highest among the three
adsorbents and can be regarded as an effective adsorbent for
removal of CR from aqueous solution.
Co-precipitation method; Nanomaterials; Nanorod; Congo red (CR); Adsorption