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Synthesis of silver/silica mesoporous composite

机译：银/二氧化硅介孔复合材料的合成

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The porous solids 2--50 nm in pore diameter and larger than 40% of porosity are defined as the mesoporous solid. Their pore number is up to 10~(19)/g and the specific surface area up to 900 m~2/g. Therefore, the mesoporous solids have important application in the catalysis, sorption and separation, etc. According to the arrangement of the pores, the mesoporous solids can be classed as the ordered and disordered mesoporous solids. If the nano-scaled particles (metal or non-metal) are put into the mesopores, the mesoporous composite is formed. The particles are dispersed and disconnected within the pores. Because of the interaction at the interface between the pore wall and particles, the properties of the particles can be altered significantly. Although some studies of mesoporous composite have been made, the work is mainly focused on the composites of the non-metal particle/ordered mesoporous solids and compound (semiconductor) particle/disordered mesoporous solid. Not much research of the composite of nano-metal particle/disordered mesoporous solid has been done. Although some nanometer composites (different from the mesoporous composite here) of Ag/inorganic compound have been reported and the Ag/porous silica mixture with interconnection between Ag particles in porous glass has been synthesized, putting the nano-sized Ag particles into the pores of a mesoporous solid to form mesoporous composite with the dispersion of Ag particles within the pores has not been reported yet (to our knowledge).In this note we present the synthesis of silver/silica mesoporous composite, i.e. the nano-scaled Ag particles being dispersed within the pores of the porous silica.
机译：孔径为2--50nm且孔隙率大于40％的多孔固体被定义为中孔固体。其孔数高达10〜（19）/ g，比表面积高达900m〜2 / g。因此，介孔固体在催化，吸附和分离等方面具有重要的应用。根据孔的排列，介孔固体可分为有序和无序的介孔固体。如果将纳米级颗粒（金属或非金属）放入中孔中，则会形成中孔复合材料。颗粒在孔内分散和分离。由于在孔壁和颗粒之间的界面处的相互作用，可以显着改变颗粒的性质。尽管已经对介孔复合材料进行了一些研究，但工作主要集中在非金属颗粒/有序介孔固体与化合物（半导体）颗粒/无序介孔固体的复合材料上。纳米金属颗粒/无序介孔固体复合材料的研究还不多。尽管已经报道了一些Ag /无机化合物的纳米复合材料（与此处的中孔复合材料不同），并且已经合成了多孔玻璃中Ag颗粒之间具有相互连接的Ag /多孔二氧化硅混合物，但将纳米级的Ag颗粒放入了玻璃的孔中。还没有报道过介孔固体形成的中孔复合物，其中Ag颗粒分散在孔中（据我们所知）。在此说明中，我们介绍了银/二氧化硅介孔复合物的合成，即纳米级Ag颗粒被分散在多孔二氧化硅的孔中。

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