Photocatalytic efficiency of titanium oxide/molybdite oxide powder mixture

Ivetić, Tamara and Finčur, Nina and Abramović, Biljana and Vulić, Predrag and Far, Ljubica Đačanin and Lukić-Petrović, Svetlana: Photocatalytic efficiency of titanium oxide/molybdite oxide powder mixture. Proceedings of the International Symposium on Analytical and Environmental Problems, (24). p. 133. (2018)

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Abstract

Coupling TiO2 with MoO3 is one of many strategies for the enhancement of titanium oxide photoabsorption under the solar light irradiation. TiO2 being a wide band-gap semiconductor with its unique properties (nontoxicity, photo and chemical stability, and low-cost) is a prominent material for the photocatalytic applications but only when excited by the UV light [1]. Here we report for the first time the photocatalytic efficiency of mixed 2TiO2/MoO3 powders prepared using a simple, mechanochemical solid-state chemistry procedure at a relatively low temperature of 700 °C. Materials structure was examined by means of X-ray diffraction that confirmed the presence of three phases, rutile TiO2, anatase TiO2 and molybdite MoO3 [2]. A unique heterojunction structure with Ti-O-Mo bond between the TiO2 and MoO3 interfaces enables the solar light-driven photocatalytic reaction as well as more efficient separation of the photogenerated electrons and holes for the overall improvement of TiO2 photocatalytic performance. The mixed titanium oxide/molybdite oxide photocatalytic activity was examined under simulated solar irradiation and the experimental photocatalytic kinetics showed that the obtained 2TiO2/MoO3 powder mixture has a good potential for Visactivated degradation of ciprofloxacin, a widely used antibiotic for the treatment of a number of bacterial infections, which is the reason why it was continuously introduced into the environment through wastewaters, and therefore represents a potential risk for the living organisms.

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