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1. University of Technology, Vietnam National University Ho Chi Minh City, 268 Ly Thuong Kiet Str., Ho Chi Minh City 70100, Vietnam
2. Institute of Chemical Technology, Vietnam Academy of Science and Technology, 01 Mac Dinh Chi Str., Ho Chi Minh City 70100, Vietnam


In this paper, TiO2 and Fe-doped TiO2 had been prepared by the sol-gel method. Physico-chemical characteristics of the catalysts were determined by the methods of BET Adsorption, XRD, FT-IR, and UV-Vis spectroscopies. Experimental results showed that the The modification of TiO2 catalyst with Fe led to reducing the crystallite size and PZC, and extending the spectrum of photon absorption to the visible region. The activity of obtained catalysts for photodegradation of cinnamic acid (CA) solution in the presence of various oxidizing agents (O2, O3 and H2O2) was investigated and the optimum reaction conditions were identified. It follows that the addition of Fe additive is able to reduce the optimal catalyst concentration 3-5 times and increase the catalytic activity. It was found that O3 and H2O2 agents showed the higher efficiency for cinnamic acid photodecomposition than usual O2. In optimum conditions, after 90 minutes reaction, the conversion of cinnamic acid in the solution achieved 58.5, 77.7 and 83.1% on TiO2 and 85.7, 82.8 and 89.4% on Fe-TiO2 in the presence of O2, O3 and H2O2 respectively.


Photodegradation, cinnamic acid, oxidizing agents, TiO2 and Fe-TiO2.

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