Sharif University of Technology Scientia Iranica 1026-3098 30 6 2023 11 01 The first study of adsorption of methylene blue by Black Titania (B-TiO2) nanoparticle in aqueous solution 2001 2010 22963 10.24200/sci.2022.58793.5897 EN M. Soleimani School of Chemistry, College of Science, University of Tehran, Tehran, Iran E. Boorboor Azimi School of Chemistry, College of Science, University of Tehran, Tehran, Iran M. Mousavi School of Chemistry, College of Science, University of Tehran, Tehran, Iran J. B. Ghasemi School of Chemistry, College of Science, University of Tehran, Tehran, Iran A. Badiei School of Chemistry, College of Science, University of Tehran, Tehran, Iran Journal Article 2021 07 30 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. https://scientiairanica.sharif.edu/article_22963_ac182424ec10c3a1232df2de9aaed405.pdf