Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 21, Issue 3, Pages 887-892Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0jm03040f
Keywords
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Funding
- National Natural Science Foundation of China [21031001, 20971040, 21001042]
- Ministry of Education of China [708029]
- Heilongjiang Provincial Education Department [11541283]
- Excellent Youth of Common Universities of Heilongjiang province of China [1154G24]
- Harbin youth Foundation [2009RFQXG202]
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A facile template-free method has been developed for the controllable fabrication of novel hierarchical flower-like Bi2MoO6 hollow spheres via a solvothermal process in the presence of ethylene glycol. The formation mechanism was proposed based on the evolution of morphology as a function of solvothermal time, which involves the initial formation of nanoparticles followed by their self-aggregation to microspheres and transformation into hierarchical flower-like hollow spheres by Ostwald ripening. The integer appearance of the hierarchical flower-like Bi2MoO6 hollow spheres was maintained after calcination at 400 degrees C for 3 h. Furthermore, the calcined hierarchical flower-like Bi2MoO6 hollow spheres exhibited excellent visible-light-driven photocatalytic efficiency for the degradation of Rhodamine B, up to 95% within 2 h, which was much higher than that of Bi2MoO6 prepared by solid-state reaction and TiO2 (P25). The improved photocatalytic performance could be ascribed to the special hierarchical hollow sphere structure, good permeability and large surface area.
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