Anatase titania-coated bismuth ferrite nanocomposites have been fabricated via a hydrothermal approach combined with a hydrolysis precipitation processing. Analysis of the microstructure and phase composition reveals that a core-shell structure can be formed, which results in a significant redshift in the UV-vis absorption spectra as compared to a simple mechanical mixture of nanopowders. The core-shell structured nanocomposites exhibit higher photocatalytic activity for photodegradation of Congo red under visible-light irradiation, which should be attributed to the enhancement of the quantum efficiency by separating the electrons and holes effectively. The obtained nanocomposites can be used as potential visible-light driven photocatalysts.
core-shell structured nanocomposites as visible-active photocatalysts and their optical response mechanism
Shun Li, Yuan-Hua Lin, Bo-Ping Zhang, Jing-Feng Li, Ce-Wen Nan; core-shell structured nanocomposites as visible-active photocatalysts and their optical response mechanism. J. Appl. Phys. 1 March 2009; 105 (5): 054310. https://doi.org/10.1063/1.3091286
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