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

机译:FeOOH-SiO2纳米复合材料中FeOOH纳米颗粒和非晶二氧化硅基质的表征

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A nanocomposite with an FeOOH/SiO2ratio 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 pureSiO2sample obtained by hydrolysis of TEOS under the same operative conditions followed in the nanocomposite preparation.
机译:用XRD,TGA-DTA,高比电子比色法,BET和TEM技术研究了FeOOH / SiO2比等于17.7%wt%的纳米复合材料和通过与盐酸反应腐蚀掉纳米颗粒而获得的相关基质。研究表明,纳米复合物中存在水铁矿纳米粒子相,平均尺寸约为4 nm。使用分布差曲线法通过同步加速器X射线衍射数据分析FeOOH纳米颗粒的结构。通过蚀刻掉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相同的操作条件下水解TEOS得到的纯SiO2样品的多孔结构显着不同。

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