Journal
MATERIALS LETTERS
Volume 64, Issue 2, Pages 223-225Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2009.10.048
Keywords
Nanomaterials; LaFeO3; Visible light photocatalytic activity; Characterization methods; Doped
Funding
- National Natural Science Foundation of China [20806021]
- Natural Science Foundation of Hebei Province [B2009000678]
- Research Foundation of Hebei Province Education Department [2007440]
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Nanoparticles of lanthanum ferrite (LaFeO3) and calcium-doped LaFeO3 (La1-xCaxFeO3-x = 0.05-0.20) with perovskite-type structure have been prepared in a reverse microemulsion. Perovskite powder could be obtained at 500 degrees C for 3 h. The prepared powders were characterized by thermogravimetry-differential thermal analysis (TG-DTA), X-ray diffraction (XRD) and UV-Vis absorption spectroscopy. The visible-light photocatalytic activity of the photocatalysts was tested with methylene blue as an objective decomposition substance using fluorescence light as a visible light resource. The results showed that partial substitution of La3+ in LaFeO3 with Ca2+ could decrease the crystalline size, enhance visible light absorption and improve visible light photocatalytic activity. (C) 2009 Elsevier B.V. All rights reserved.
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