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Photoluminescence Probing of the Formation of Titanium Dioxide Sols from a Titanium Peroxide Solution
Author(s) -
Seok Sang Il,
Kim Mi Sun,
Suh Tae Soo
Publication year - 2002
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.1151-2916.2002.tb00373.x
Subject(s) - photoluminescence , anatase , luminescence , titanium , materials science , titanium dioxide , analytical chemistry (journal) , spectroscopy , inorganic chemistry , chemistry , photocatalysis , catalysis , metallurgy , biochemistry , physics , optoelectronics , chromatography , quantum mechanics
Photoluminescence spectroscopy was used to probe the formation of colloidal TiO 2 sols from a titanium peroxide solution, which were prepared by reaction of H 2 O 2 and titanium hydrate gel that was precipitated from acidic TiOCl 2 solution neutralized by NH 4 OH, during aging at 100°C for 0–64 h. Emission spectra revealed broad band luminescence which is interpreted as the superposition of a multiple photoluminescence process involving TiO 2 precursors. The maximum peak position of the luminescence band was shifted to a shorter wavelength by the generation of the dominant emission peak as aging time increased, and a peak at ∼390 nm, indicating the anatase phase, was observed after aging for >48 h. However, sols aged for 2 h already were of the anatase phase, according to X‐ray diffraction analysis. It was deduced that the interfacial layers between the particles and the liquid in an aqueous solution caused luminescence quenching or accelerated sink.