the first study of adsorption of methylene blue by black titania (b-tio2) nanoparticle in aqueous solution

In this study, the elimination of methylene blue (mb) by adsorption on black titania (b-tio2) in an aqueous solution in the dark room is investigated. preparation of b-tio2 was carried out via the reduction of white tio2 by nabh4 in a tube furnace under an inert gas atmosphere at 600°c. characterization of the absorbent was carried out by xrd, n2 adsorption-desorption, sem mapping, photoluminescence, edx analysis, zeta potential, dls, and ft-ir. the maximum adsorption capacity of b-tio2 was found to be 88.65 mg g−1. the rate-limiting step was the intra-particle diffusion stage. the maximum adsorption was observed under the conditions: 26 mg of the b-tio2 at ph 6 and mb concentration of 10 mg l−1. it was demonstrated that b-tio2 might be recycled six times with very good adsorption results while keeping its high removal efficiency.