Abstract
Nanocrystalline TiO2 particles were prepared by three methods: direct hydrolysis from metatitanic acid dissolved in the presence of concentrated sulphuric acid; hydrolysis of titanium sulphate (TiSO4); and from powders obtained by peptising precipitates with hydrochloric acid and tetraethylammonium hydroxide to form crystal phases at lower temperatures. Samples were characterised by transmission electron microscopy, X-ray diffractometry, and Brunauer–Emmitt–Teller surface area analysis. In the photodegradation of anionic sodium dodecylbenzenesulphonate surfactant, nanosized TiO2 with mixed anatase and rutile phases was found to show improved photocatalytic properties over commercial P-25 titania powder.
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