Open AccessSynthesis of Fe-doped TiO2 nanotubes by hydrothermal method for photodegradation of methylene blue from aqueous solutions
Author(s) -
Hung Nguyen Van,
Nhi Tran Thi Yen,
Nghi Nguyen Huu,
Nguyet Bui Thi Minh
Publication year - 2021
Publication title -
xúc tác và hấp phụ
Language(s) - English
Resource type - Journals
ISSN - 0866-7411
DOI - 10.51316/jca.2022.005
Subject(s) - photodegradation , photocatalysis , methylene blue , aqueous solution , hydrothermal circulation , materials science , reaction rate constant , nuclear chemistry , doping , visible spectrum , bet theory , specific surface area , ferric , inorganic chemistry , kinetics , chemistry , catalysis , chemical engineering , organic chemistry , physics , optoelectronics , quantum mechanics , engineering
Fe-doped TiO2 nanotubes were prepared by hydrothermal method using ferric nitrate and commercial TiO2 powder. The obtained materials were characterized by means of XRD, TEM, BET, FT-IR and UV-Vis-DRS. The photocatalytic activity was evaluated based on photodegradation of methylene blue under visible light irradiation. The results show that Fe3+ ions might incorporate into the lattice of TiO2 nanotubes. Fe-doped TiO2 materials showed narrower band gap energies, higher specific surface areas, more hydroxyl groups on the surface and significantly improved photocatalytic activity. The optimum Fe doping at the molar ratios of Fe/Ti = 0.5% showed the highest photocatalytic activity and was 3.08 times higher than that of undoped TiO2. The kinetic studies showed the decomposition of MB followed pseudo first-order kinetics with the rate constant were determined kapp = 5.64×10-2 min−1.