Characterization of FeOOH Nanoparticles and Amorphous Silica Matrix in an FeOOH-SiO2 Nanocomposite. (12th December 2007)

• Record Type: Journal Article
• Authors: Ennas, Guido; Casula, Maria F.; Marras, Sergio; Navarra, Gabriele; Scano, Alessandra; Marongiu, Giaime
• Other Names: Cho Sang-Hee Academic Editor.
• Is Part Of: Journal of nanomaterials. Volume 2008(2008)
• Publication Date: 2007-12-12
• Subjects: Nanostructured materials -- Periodicals; Nanotechnology -- Periodicals; Nanomatériaux; Nanostructured materials; Nanotechnology; Nanostructures; Nanotechnology; Periodicals; Fulltext; Internet Resources; Periodicals; 620.115
• DOI: 10.1155/2008/361816
• Languages: English
• ISSNs: 1687-4110

Abstract

Abstract : A nanocomposite with an FeOOH/SiO 2 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 pureSiO 2 sample obtained by hydrolysis of TEOS under the same operative conditions followed in the nanocomposite preparation.