Abstract
Hierarchical composite particles with hollow structure were fabricated in this work. The composite particles were composed of guest particles and host ones, which were achieved by Stober method, and a raspberry-like morphology was produced by the “anchoring” of guest particles on the surface of host ones. Moreover, the hollow structure was obtained by template-assisted approach. The raspberry-like morphology and hollow structure of composite particles were confirmed by scanning electron microscopy and transmission electron microscopy. As multiple distinct functional components were integrated into the raspberry-like particles, the obtained composite particles exhibited enhanced photocatalytic activity under visible light irradiation. The rate of degradation of the as-prepared composite particles was ca. 13 times faster than that of pure TiO2 under visible light irradiation. Furthermore, a brief photocatalytic mechanism was presented. The composite particles, combining hierarchical morphology and hollow structure, exhibit promising potential in self-cleaning and nanoreactor areas.
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