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Characterization of FeOOH Nanoparticles and Amorphous Silica Matrix in an FeOOH-SiO2Nanocomposite

机译:FeOOH-SiO2NanoC复合材料中FeOOH纳米颗粒和无定形二氧化硅基质的表征

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摘要

A nanocomposite with an FeOOH/SiO2 ratio equal to 17.7 wt% and the pertinent matrix, obtained by etching away the nanoparticles through reaction with hydrochloric acid, were investigated by XRD, TGA-DTA, heliostereopicnometry, BET, and TEM techniques. The study shows the presence in the nanocomposite of ferrihydrite nanoparticles phase with average dimensions around 4 nm. The FeOOH nanoparticles structure was analyzed by synchrotron X-ray diffraction data using the distribution difference curve method. The porous structure of the matrix resulting by etching away the nanoparticles differs significantly from that of a pure SiO2 sample obtained by hydrolysis of TEOS under the same operative conditions followed in the nanocomposite preparation.
机译:通过XRD,TGA-DTA,Heliostopicencormy,BET和TEM技术研究了通过与盐酸反应蚀刻纳米颗粒而获得的FeOOH / SiO 2比例的纳米复合材料和相关基质。该研究表明,在纳米颗粒纳米粒子相中存在的存在,其平均尺寸约为4nm。使用分布差曲线法通过同步X射线衍射数据分析FeOOH纳米颗粒结构。通过蚀刻纳米颗粒而产生的基质的多孔结构与通过在纳米复合材料制备中的相同操作条件下水解TEOS获得的纯SiO 2样品的多孔结构显着不同。

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