Abstract
Hollow waxberry-like rutile- and anatase-TiO2/SnO2 (TiO2@SnO2) hierarchical architecture was fabricated for efficient photocatalysis. A Topotactic synthetic method, including the synthesis of CaTiO3/CaSnO3 precursors and subsequent transformation into TiO2@SnO2, was used. Rutile TiO2 nanorods nearly radial alignment grow on the external surface of the hollow sphere composed of anatase TiO2 and SnO2 nanoparticles. Because the hollow hierarchical structure enhances light harvesting ability and the tightly connected interface among different components improves the electron transfer efficiently, a waxberry-like TiO2@SnO2-5% sample with appropriate phase composition exhibits excellent photocatalytic performance. The sample behaved superior cycle stability.
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