TiO2 microspheres were synthesized by the sol–gel method using the ionic liquid (IL) 1-vinyl-3-propylimidazolium iodide (VPIM+I−) as a reaction medium, then calcined at 500 °C. The samples were characterized by X-ray diffraction, scanning electron microscopy, and ultraviolet–visible (UV–Vis) diffuse reflectance spectroscopy. The phase of TiO2 microspheres is anatase, and VPIM+I− is able to favor the growth of anatase phase and prevents the collapse of small pores. The photocatalytic activity of TiO2-IL was tested by degradation of 2-nitrophenol under UV light illumination. The photocatalytic activity of TiO2-IL was higher than that of samples prepared in the reaction medium without VPIM+I−.
Research on Chemical Intermediates – Springer Journals
Published: Sep 27, 2012
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