Open AccessPreparation and characterisation of bismuth-doped TiO2 nanotubes (Bi–TiO2–NT) and its photocatalytic activity test for rhodamine B elimination under visible light
Author(s) -
Mohamed Aqil,
Jarnuzi Gunlazuardi
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1442/1/012051
Subject(s) - photocatalysis , materials science , rhodamine b , visible spectrum , scanning electron microscope , fourier transform infrared spectroscopy , ethylene glycol , bismuth , band gap , nuclear chemistry , diffuse reflectance infrared fourier transform , spectroscopy , chemical engineering , analytical chemistry (journal) , optoelectronics , chemistry , organic chemistry , composite material , catalysis , metallurgy , engineering , physics , quantum mechanics
As a photocatalyst, TiO 2 nanotubes can effectively degrade dyes; thus, they exhibit a considerable potential to mitigate the problem of river pollution by dye waste originating from the textile industry. However, with a band gap of 3.2 eV (UV light energy range), such nanotubes cannot be completely utilizing under visible light from the sun. Therefore, in this study, the TiO 2 nanotubes are modified using bismuth to obtain bismuth-doped TiO 2 -NT (Bi–TiO 2 –NT), which exhibits an activity under visible light. Bi-TiO2-NT was successfully synthesized by one-step anodization with Bi(NO 3 ) 3 as the dopant source. The optimum synthesis conditions obtained were as follows: 1.0 M Bi(NO 3 ) 3 in an ethylene glycol electrolyte with anodization at 40 V for 1 h. In this study, the synthesized photocatalyst was characterized using X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), UV-Vis Diffuse Reflectance Spectroscopy (DRS), Scanning Electron Microscopy–Energy Dispersive X-Ray Spectroscopy (SEM-EDS), and Linear Sweep Voltametry (LSV). The results of the photocatalytic activity tests indicated that under visible light illumination the prepared Bi–TiO 2 –NT was able to eliminate rhodamine B from the tested water, better then bare TiO 2 .