Open AccessStudy on Preparation and Photocatalytic Activity of V-Doping Mixed Crystalline Phase TiO2 Powders
Author(s) -
Fuchang Peng,
Qi Lai,
Jiasong Zhong
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/774/1/012041
Subject(s) - photocatalysis , anatase , materials science , crystallinity , rutile , doping , calcination , particle size , vanadium , phase (matter) , chemical engineering , analytical chemistry (journal) , nuclear chemistry , metallurgy , chemistry , chromatography , catalysis , composite material , organic chemistry , optoelectronics , engineering
The vanadium-doping TiO 2 photocatalysts powders with different vanadium contents were prepared by a facile sol-gel method. The TiO 2 powders were characterized by PL, XRD, UV-Vis-DRS and Laser particle size analyzer. The photocatalytic performance was valuated by photo-degradation of methyl blue. The degradation effect of MB was investigated on the influence of heat treatment temperature and vanadium doping amount. The results show that V-doping can promote the TiO 2 particles phase transformation from anatase to rutile and restrain the particles size growth. The V-TiO 2 sample is a mixture of rutile phase and anatase phase with good crystallinity. The sample of V-TiO 2 particle size distribution is relatively uniform and narrow. The absorption spectrum of TiO 2 after doping has obvious red shift compared with that before doping. V-doping can inhibit the recombination of photogenerated e − /h + pairs. The photocatalytic activity of V-TiO 2 with n(V): n(Ti) =1: 100 and calcined at 450 °C is the best, it is 57% in 100 minutes under the irradiation of fluorescent lamp. It is obviously higher than the activity of undoped TiO 2 powders.