Selective and Recyclable Congo Red Dye Adsorption by Spherical FeO Nanoparticles Functionalized with 1,2,4,5-Benzenetetracarboxylic Acid.

In this study, the new material FeO@BTCA has been synthesized by immobilization of 1,2,4,5-Benzenetetracarboxylic acid (BTCA) on the surface of FeO NPs, obtained by co-precipitation of FeCl.6HO and FeCl.4HO in the basic conditions.