Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 115, Issue 25, Pages 12375-12380Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp203566v
Keywords
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Funding
- National Nature Science Foundation of China [21071048]
- Science Foundation of Harbin City of China [2011RFXXG001]
- Program for Innovative Research Team in Heilongjiang University [Hdtd2010-02]
- programme for New Century Excellent Talents in universities [NCET-07-259]
- Science Foundation of Excellent Youth of Heilongjiang Province of China [JC200701]
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In this work, a feasible strategy has been developed to fabricate highly active TiO2-based photocatalysts for degrading rhodamine B solution under ultraviolet or visible irradiation. The key of this strategy is to compound a small amount of porous LaFeO3 to nanocrystalline TiO2, leading to the delay of anatase-rutile phase tansformation and then to the formation of the anatase TiO2/rutile TiO2/LaFeO3 three-phase nanostructured hetero-junctions after thermal treatment at a high temperature of 800 degrees C. The resulting three-phase heterojunctions greatly favor the photoinduced charge separation, especially promoting the visible induced electrons of LaFeO3 captured by the adsorbed O-2, based on their surface photovoltage responses, which is well responsible for the ultraviolet or visible activity enhancement. This work would provide a feasible route to fabricate high-performance TiO2-based nanomaterials.
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