Open AccessEffect of doping TiO2 with alkaline-earth metal ions on its photocatalytic activity
Author(s) -
Yuexiang Li,
Shaoqin Peng,
Fengyi Jiang,
Gongxuan Lü,
Shuben Li
Publication year - 2007
Publication title -
journal of the serbian chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.227
H-Index - 45
eISSN - 1820-7421
pISSN - 0352-5139
DOI - 10.2298/jsc0704393l
Subject(s) - dopant , photocatalysis , coprecipitation , calcination , x ray photoelectron spectroscopy , doping , alkaline earth metal , materials science , metal ions in aqueous solution , inorganic chemistry , ion , metal , nuclear chemistry , chemistry , catalysis , chemical engineering , metallurgy , organic chemistry , optoelectronics , engineering
TiO2 photocatalysts doped with alkaline-earth metal ions were prepared by the impregnation and coprecipitation methods. The sample were characterized by XRD, XPS and IR spectroscopy. Their activities were evaluated by the photocatalytic production of hydrogen. The activities of the doped photocatalysts dopended on the size of the dopant ions and the doping method. The optimum molar contents of dopant ions Be2+, Mg2+, Ca2+, Sr2+, Ba2+ were 1.25, 1.25, 2.25, 2.25 and 2.25 at. %, respectively. The optimum calcination temperature and time were 400?C and 1 h. .