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. 2018 Mar 3;190(4):188.
doi: 10.1007/s10661-018-6565-y.

Feasibility of Applying the LED-UV-induced TiO 2/ZnO-supported H 3 PMo 12 O 40 Nanoparticles in Photocatalytic Degradation of Aniline

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Feasibility of Applying the LED-UV-induced TiO 2/ZnO-supported H 3 PMo 12 O 40 Nanoparticles in Photocatalytic Degradation of Aniline

Mahmoud Taghavi et al. Environ Monit Assess. .

Abstract

In the present study, TiO2/ZnO-supported phosphomolybdic acid nanoparticles are investigated by the impregnation method, followed by analyzing their photocatalytic activity under UV-LED light and degradation kinetics degrading aniline as an organic pollutant model. Nanoparticle characteristics and the remaining Keggin structure in the nanocomposites were confirmed by means of FESEM, FTIR, and XRD analyses. Heterogenization of phosphomolybdic acid on TiO2 and ZnO nanoparticles resulted in the improved light absorption intensity and decreased band gap of nanocomposites. Photocatalytic degradation of aniline was also improved for composite nanoparticles and reached to 25.62, 43.48, and 38.25% for TiO2/HPMo, ZnO/HPMo, and TiO2/ZnO/HPMo, respectively. Overall, the results showed a good fit to the Langmuir-Hinshelwood kinetic model.

Keywords: Aniline; Phosphomolybdic acid; Photocatalytic degradation; Polyoxometalate; TiO2; ZnO.

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