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首页> 外文期刊>Chemistry: A European journal >Synthesis of multifunctional metal- and metal oxide core@mesoporous silica shell structures by using a wet chemical approach
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Synthesis of multifunctional metal- and metal oxide core@mesoporous silica shell structures by using a wet chemical approach

机译：湿化学法合成多功能金属和金属氧化物核@介孔二氧化硅壳结构

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摘要

We demonstrate a facile wet chemical approach for fabricating spherical metal/metal-oxide core@mesoporous silica shell hybrid nanoparticles with different core and shell thicknesses. Vertically aligned mesoporous silica(mSiO _2) shells were fabricated over the pre-synthesized spherical SiO _2 nanoparticles through a three-step strategy: 1)-synthesis of core materials, 2)-covering the core with an organic-inorganic composite layer, and 3)-removing the organic template through calcinations in air. The mechanisms of hybrid structure formation are proposed. The multifunctional nature of the hybrid structures could be induced by incorporating guest ions/molecules, such as Ag, Mn, and TiO _2, into the pores of an mSiO _2 shell. Mn and TiO _2 cluster- incorporated composite structures have been tested to be antioxidizing agents and effective photocatalysts through electron spin resonance, radical scavenging tests, and the photocatalytic degradation of rhodamine B. The possibility of incorporating several hetero-element guest clusters in these mesoporous composite particles makes them highly attractive for multifunctional applications.
机译：我们展示了一种简便的湿化学方法，用于制备具有不同核和壳厚度的球形金属/金属氧化物核@介孔二氧化硅壳杂化纳米粒子。通过三步策略在预合成的球形SiO _2纳米颗粒上制备垂直排列的介孔二氧化硅（mSiO _2）壳：1）合成核材料，2）用有机-无机复合层覆盖核，以及3）通过在空气中煅烧除去有机模板。提出了混合结构形成的机理。通过将客体离子/分子（例如Ag，Mn和TiO _2）掺入mSiO _2壳的孔中，可以诱导杂化结构的多功能性。通过电子自旋共振，自由基清除测试和若丹明B的光催化降解，已测试掺入Mn和TiO _2团簇的复合结构是抗氧化剂和有效的光催化剂。颗粒使它们在多功能应用中极具吸引力。

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