Removal of cationic dye (Methylorange) from aqueous solution using PMnW11@PANI@CS composite

In this study a new nanocomposite, PMnW11@PANI@CS has been synthesized as an efficient and green catalyst for the removal of cationic dyes such as Methylorange (MO) from aqueous solution. The nanocomposite was successfully prepared by reaction of mono Mn(II)-substituted Keggin-type polyoxometalate Cs5PMnW11O39 (PMnW11), Polyaniline (PANI), and chitosan (CS) at room temperature under sonication condition. The organic-inorganic hybrid characterized by FT-IR, UV–Vis, XRD, and SEM techniques. In this study the ability of PMnW11@PANI@CS to remove of Methylorange (MO) from aqueous solution by adsorption was studied. Experiments were conducted by varying parameters of dye concentration of MO, photocatalyst concentration and temperature and contact time. The percentage of color removal decreased with the increase of initial dye concentration. Results obtained indicate that PMnW11@PANI@CS nanocomposite could be employed as an efficient catalyst much more than the pure PMnW11, CS and PANI powders for decolorization from water