Thermally Stable Nanoporous Nanocrystalline TiO₂ with a Bicrystalline (Anatase-Brookite) Framework Fabricated via Combining the Soft-Templating with Solid-Liquid Method

摘要

Mesoporous anatase-brookite nanocrystalline titania was synthesized via a novel strategy relying on the combination of soft-templating and solid-liquid method (CSSL), in which the mesostructured titania hybrid was firstly synthesized via cooperative assembly between titanium sulphate and 1-hexadecyl-3-methylimidazolium bromide (C₁₆mim+Br−), and subsequently ground with solid magnesium nitrate salt followed by heat-treatment in air. The resulting mesoporous titania material still possessed a large surface area of 150 m2/g even at 700°C of calcination temperature. The anatase phase in the titania framework transformed to brookite phase at 600°C. Moreover, the photocatalytic activities of as-synthesized titania materials in the degradation of methylene orange under ultraviolet irradiation were found to be determined by their surface areas and brookite phase contents.View full textDownload full textKeywordsMesoporous, mixed phase, thermally stable, titaniaRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/01932691003800494