Coating and photochemical properties of calcia-doped ceria with amorphous silica by a seeded polymerization technique
Coating and photochemical properties of calcia-doped ceria with amorphous silica by a seeded polymerization technique
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DOI：
10.1039/b416459h
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发表时间：
2005-03
影响因子：
--
通讯作者：
A. M. El-Toni;S. Yin;Y. Hayasaka;Tsugio Sato
中科院分区：
文献类型：
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作者：
A. M. El-Toni;S. Yin;Y. Hayasaka;Tsugio Sato
氧化钙掺杂的二氧化铈作为个人护理产品中的紫外线（UV）辐射阻挡材料具有潜在的兴趣，因为其优异的UV光吸收性质和其对有机材料的氧化的低催化能力上级未掺杂的二氧化铈。为了进一步降低氧化催化活性，通过种子聚合技术用无定形二氧化硅包覆氧化钙掺杂的氧化铈。通过扫描电子显微镜、TEM、XPS和FT-IR证实了二氧化硅壳层的存在。与硅酸钠溶液的酸水解包覆相比，通过种子聚合包覆的二氧化硅在不损失紫外屏蔽能力的情况下降低了氧化催化活性。
Calcia doped ceria is of potential interest as an ultraviolet (UV) radiation blocking material in personal care products because of its excellent UV light absorption properties and its low catalytic ability for the oxidation of organic materials is superior to undoped ceria. In order to reduce the oxidation catalytic activity further, calcia doped ceria was coated with amorphous silica by means of a seeded polymerization technique. The silica shell was confirmed using scanning electron microscopy, TEM, XPS and FT-IR. Silica coating by seeded polymerization was much more efficient in the reduction of the oxidation catalytic activity without loss of the UV-shielding ability, than coating by acid hydrolysis of a sodium silicate solution.