The first study of adsorption of methylene blue by Black Titania nanoparticle in aqueous solution

Abstract

This study investigates the elimination of Methylene Blue (MB) by adsorption on Black Titania (B-TiO 2 ) in an aqueous solution in the dark room. B-TiO 2 was prepared 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 X-Ray Di raction (XRD), N 2 adsorption-desorption, Scanning Electron Microscopy (SEM) mapping, photoluminescence, Energy Dispersive X-ray spectrometry (EDX) analysis, Zeta potential, Dynamic Light Scattering (DLS), and Fourier Transform Infrared Spectrometer (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 di usion stage. Maximum adsorption was observed under the following conditions: 26 mg of B-TiO 2 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 e ciency.