Journal
RSC ADVANCES
Volume 3, Issue 35, Pages 15273-15281Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra42497a
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Funding
- Program for New Century Excellent Talents in University [NCET-12-0668]
- National Natural Science Foundation of China [20977114]
- Natural Science Foundation of Hubei Province [2011CDA107]
- Knowledge Innovation Program from South-Central University for Nationalities [2013ycx2204]
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A novel hierarchical anatase TiO2 hollow microsphere (TiO2-HMS) assembly synthesised from TiO2 hollow nanoparticles (TiO2-HNP), denoted TiO2-HMS-HNP, was rapidly fabricated by a simple hydrothermal route in a Ti(SO4)(2)-NH4F-H2O2 mixed solution at 180 degrees C for only 3 h. The influence of NH4F and H2O2 on the formation of TiO2-HMS-HNP was studied. A novel mechanism for the formation of TiO2-HMS-HNP based on a H2O2-assisted fluoride-induced self-transformation (FIST) process is proposed. The prepared TiO2-HMS-HNP showed much higher photocatalytic activity than TiO2-HMS, when the activity was evaluated both by the photocatalytic degradation rate of brilliant red X-3B (an anionic azo dye) and by the rate of formation of photo-induced hydroxyl radicals ((OH)-O-center dot) under UV irradiation.
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