Open AccessPhotocatalytic Evaluation of Bi-doped TiO/TiO2 under Solar Irradiation
Author(s) -
David E. Chávez,
C.R. García,
J. Oliva,
María Guadalupe Godina Cubillo,
Roberto Constancio Torres-Ramírez,
C.M. López-Badillo
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/842/1/012014
Subject(s) - dopant , photocatalysis , materials science , scanning electron microscope , doping , degradation (telecommunications) , irradiation , methylene blue , chemical engineering , analytical chemistry (journal) , nuclear chemistry , environmental chemistry , chemistry , optoelectronics , composite material , organic chemistry , catalysis , telecommunications , physics , computer science , nuclear physics , engineering
The photocatalytic properties of TiO2 have been studied in the last decade due to its a high capacity to degrade organic compounds which dangerous for the human health. In order to increase its degradation efficiency, we propose the doping of TiO 2 with Bi dopant using concentrations from 0 to 5 at%. A simple and fast (40 min) combustion method was used to synthesize Bi doped TiO 2 . According to the X-ray diffraction patterns, we obtained a mixture of TiO/TiO 2 phases with Bi dopant concentrations below 0.5 at.%. Above this value, the Bi7.68O12.16Ti0.32 compound was obtained. The morphological studies by Scanning electron microscopy demonstrated that a porous material is obtained for Bi concentrations below 0.5% but highly coalesced particles appeared for higher concentrations. The Bi doped materials were used to degrade Methylene blue dye under solar exposure and found a maximum degradation percentage of 96% for the sample doped with 0.1 at% of Bi.