Ordered Growth of Titanium Dioxide Nanorods on the Surface of Hollow Microspheres
ACTA CHIMICA SINICA(2010)
摘要
Hollow microspheres were coated by titanium dioxide via the surface sol-gel pretreatment and the hydrothermal method. Obtained products were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), etc. Effects of varied process parameters were explored on the morphology and structure of products. Experimental results showed that the surface sol-gel pretreatment played a critical role in the following hydrothermal reaction. By first treating the hollow microsphere surface using the surface sol-gel process followed by the hydrothermal reaction under appropriate conditions, we successfully coated hollow microspheres with close-packed anatase nanorods perpendicular to the surface of hollow microsphere. These materials are light-weighted and corrosion-resistant, and are expected to become a new type of photocatalyst that holds promise in abatement of organic pollutants on large-area surface waters.
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关键词
surface sol-gel process,hydrothermal synthesis,hollow microsphere,coating,titanium dioxide
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