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A comparison of N‐doped TiO 2 photocatalysts preparation methods and studies on their catalytic activity
Author(s) -
Liu Yanan,
He Jun,
Sun Yu,
Hu Jinlong,
Li Chunyan,
Xue Gang,
Ognier Stéphanie
Publication year - 2013
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.4029
Subject(s) - photocatalysis , catalysis , visible spectrum , doping , degradation (telecommunications) , titanate , hydrolysis , adsorption , materials science , photochemistry , nuclear chemistry , chemistry , organic chemistry , ceramic , optoelectronics , composite material , telecommunications , computer science
Abstract Background N‐doped TiO 2 can narrow the TiO 2 forbidden band and thereby increase its catalytic activity under visible light. In this work, three methods (the sol–gel method ( SG ), the tetrabutyl titanate hydrolysis precipitation method TN ', and the H 2 O 2 ‐modified method ( TNH )) were used to prepare N‐doped TiO2 photocatalysts. The Reactive Red‐Violet dye ( KN ‐R) was used as the target pollutant. The catalytic activities of the photocatalysts prepared via the three methods were compared and studied . Results The structures and optoelectronic properties of these catalysts were characterized by various means. The results demonstrated that the N‐doped TiO 2 catalyst synthesized using the TNH method exhibited the most efficient catalytic activity under visible light and produced a degradation rate of 90% for the Reactive Red‐Violet dye. The N‐doped TiO 2 prepared using the SG method exhibited the lowest catalytic activity under both UV and visible light. The kinetics of photocatalysis degradation for KN ‐R by N‐doped TiO 2 prepared by TNH method was studied and found to be zero order due to the good adsorption effect between KN ‐R and TiO 2 . Conclusion The N‐doped TiO2 prepared by TNH method showed good photocatalytic activity in the case of degrading dye under both UV and visible light. © 2013 Society of Chemical Industry