Efficient persistent photocatalytic decomposition of nitrogen monoxide over a fluorescence-assisted CaAl2O4:(Eu, Nd)/(Ta, N)-codoped TiO2/Fe2O3

Authors: Huihui Li, Shu Yin, Yuhua Wang, Tsugio Sato

Abstract:
An effective promoting approach was described to modify the photoelectrochemical properties of rutile TiO₂ by codoping with the nonmetal N and transition metal Ta ions, followed by loading with Fe₂O₃. Here, the charge compensated and coupled semiconductor systems were constructed, and their visible-light and persistent fluorescence assisted photocatalytic activities for NO destruction and CH₃CHO removal were evaluated. The results demonstrated that both the charge compensation of TiO₂ by co-doping with N³⁻ and Ta⁵⁺ and loading with a proper amount of Fe₂O₃ facilitated the enhancement of both the visiblelight and persistent fluorescence induced photocatalytic ability. The TiO₂ co-doped with N³⁻ and Ta⁵⁺ followed by loading with Fe₂O₃ excellently met the criteria for the persistent photocatalysts, which can be functional for environmental purification even after turning off lamp irradiation. 

Keywords:
Compensated codoping
Loading
Coupling
Persistent fluorescence assisted
Visible-light
Photocatalyst

Published in: Applied Catalysis B: Environmental (Volumes 132–133, Pages 1-552, 27 March 2013)

Publisher: Elsevier  

ISSN Information: 0926-3373

Efficient persistent photocatalytic decomposition of nitrogen monoxide over a fluorescence-assisted CaAl2O4:(Eu, Nd)/(Ta, N)-codoped TiO2/Fe2O3

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