alexa INVESTIGATION OF THE EFFE CT OF HEAT TREATMENT PROCESS ON CHARACTERISTIC S AND PHOTOCATALYTIC ACTIVITY OF TiO 2 -UV100 NANOPARTICLES
Nutrition

Nutrition

Journal of Food & Industrial Microbiology

Author(s): MOHAMMAD A BEHNAJADY, MALIHEH ELHAMI ALAMDARI, NASSER MODIRSHAHLA

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The effect of heat treatment process on crystallite size, phase content, surface area, band gap en- ergy and photocatalytic activity of TiO 2 -UV100 nanoparticles were inve stigated. Heat treated TiO 2 nanoparticles were characterized by X-ray diffr action (XRD), Brunauer–Emmett–Teller (BET) iso- therm and diffuse reflectance spectroscopy (DRS) techniques, and its photocat alytic activity was in- vestigated in the removal of C.I. Acid Red 88 (AR88), an anionic monoazo dye of acid class, as a model contaminant. Heat treatment process at 600 °C causes an increase in crystalli te size and band gap energy of TiO 2 -UV100 nanoparticles. The results indicate that the nanoparticles treated for 1 h at 600 °C show the highest photocat alytic activity which can e ffectively degrade AR88 under UV- irradiation. Increasing heat treatment temperature above 600 °C led to reduction in TiO 2 photoactivity which may be related to the anatase-rutile phase transformation, increasing particle size and decreas- ing specific surface area. Removal efficiency of AR88 with heat treated TiO 2 -UV100 nanoparticles was sensitive to the operational parameters such as catalyst dosage, pollutant concentration and light intensity.

This article was published in Environment Protection Engineering and referenced in Journal of Food & Industrial Microbiology

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