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Synthesis and silica coating of calcia-doped ceria/mica nanocomposite by seeded polymerization technique

机译：种子聚合技术合成掺钙的二氧化铈/云母纳米复合材料及其二氧化硅涂层

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Calcia-doped ceria is of potential interest as an ultraviolet (UV) radiation blocking material in personal care products because of the excellent UV light absorption property and low catalytic ability for the oxidation of organic materials superior to undoped ceria. In order to reduce the oxidation catalytic activity further, calcia-doped ceria was coated with amorphous silica by means of seeded polymerization technique. Generally, nanoparticles of inorganic materials do not provide a good coverage for human skin because of the agglomeration of the particles. The platy particles are required to enhance the covering ability of inorganic materials. This can be accomplished by synthesis of calcia-doped ceria/mica nanocomposite with subsequent silica coating to control catalytic activity of calcia-doped ceria. Calcia-doped ceria/mica nanocomposite was prepared by soft solution chemical method followed by silica coating via seeded polymerization technique. Silica coated calcia-doped ceria/mica nanocomposite was characterized by X-ray diffraction, SEM, TEM, XPS and FT-IR. (c) 2005 Elsevier B.V. All rights reserved.
机译：掺杂氧化钙的二氧化铈作为个人护理产品中的紫外线（UV）阻隔材料具有潜在的吸引力，因为其优异的紫外光吸收性能和对有机材料氧化的催化能力比未掺杂的二氧化铈低。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涂覆了氧化钙掺杂的二氧化铈。通常，由于颗粒的团聚，无机材料的纳米颗粒不能为人体皮肤提供良好的覆盖。需要板状颗粒以增强无机材料的覆盖能力。这可以通过合成掺有氧化钙的二氧化铈/云母纳米复合物并随后进行二氧化硅涂层以控制掺有氧化钙的二氧化铈的催化活性来实现。采用软溶液化学法制备氧化钙掺杂的氧化铈/云母纳米复合材料，然后通过种子聚合技术进行二氧化硅包覆。通过X射线衍射，SEM，TEM，XPS和FT-IR表征了二氧化硅涂覆的氧化钙掺杂的氧化铈/云母纳米复合材料。 （c）2005 Elsevier B.V.保留所有权利。

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