Synthesis and UV-shielding characterization of plate-like titanate/calcia-doped ceria composite
نویسندگان
چکیده
In order to obtain further performance improvement concerning UV-shielding materials with good comfort and safety, a ball-milling assisted three-step coating method was carried out. First, the calcia-doped ceria (CDC) nanoparticles were prepared using coprecipitation method at pH12.0. Secondly, the as-prepared CDC powder was dispersed by ballmilling to break the big agglomerations of CDC. Thirdly, the colloid of ball-milled CDC particles was used to coat the CDC on plate-like titanate (PLT) substrate at a low pH of 6.5 to obtain the PLT/CDC composite. The effect of ball milling on the dispersion of CDC nanoparticles was checked by a laser diffraction particles size analyzer (SALD-7000, SHIMADZU). The morphology of PLT/CDC composites were evaluated by a field-emission scanning electron microscope. The oxidation catalytic activities, the UV-shielding ability and the dynamic friction coefficient of the obtained PLT/CDC composites were characterized. PLT/CDC composite with good comfort and low oxidation catalytic activity was successfully synthesized by the combination of PLT and CDC dispersed by ball-milling.
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