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Structural and Optical Characterization of Rutile TiO 2 @SiO 2 Nanopowders Doped with Iron Ions
Author(s) -
Chen Jing,
Yang MingShu
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04529.x
Subject(s) - rutile , materials science , amorphous solid , ammonium hydroxide , x ray photoelectron spectroscopy , dopant , titanium dioxide , nanorod , titanium , doping , inorganic chemistry , nuclear chemistry , chemical engineering , analytical chemistry (journal) , nanotechnology , crystallography , chemistry , metallurgy , optoelectronics , chromatography , engineering
Core–shell structures of Fe‐doped nanostructured TiO 2 @SiO 2 were synthesized through the ammonium hydroxide catalyzed hydrolysis of tetraethylorthosiliane in isopropanol media containing presynthesized Fe 3+ ‐doped rutile TiO 2 nanorods. Fe 3+ ‐doped titanium dioxide were prepared from aqueous titanium (III) chloride solution in the presence of powder Fe 2 O 3 (0–30 wt% relative to TiCl 3 ) using hydrothermal method. The structure of the powders was characterized by X‐ray diffraction, X‐ray photoelectron spectroscopy, ICP–OES, and transmission electron microscopy. The experimental results showed that the core structure appeared to be composed of rutile titania nanocrystals. The optimum dopant content was about 5 wt%. The thickness of the amorphous SiO 2 shell was about 2.5 nm. Ultraviolet–Vis reflection measurements revealed that the absorption of pure TiO 2 was significantly blue‐shifted upon the incorporation of Fe 3+ into the TiO 2 host.