Nanocrystalline TiO2 doped by small amount of pre-synthesized colloidal CdS nanoparticles for photocatalytic degradation of 1,2,4-trichlorobenzene |
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| Authors: | Natalia S. Kozhevnikova Tatyana I. Gorbunova Andrey S. Vorokh Marina G. Pervova Alexsander Ya. Zapevalov Victor I. Saloutin Oleg N. Chupakhin |
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| Affiliation: | 1. Institute of Solid State Chemistry of the Ural Branch of the Russian Academy of Sciences, Pervomaiskaya st. 91, Ekaterinburg 620990, Russia;2. I.Ya. Postovskii Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, Kovalevskoy st. 22, Ekaterinburg 620990, Russia;3. Ural Federal University, Mira st. 19, Ekaterinburg 620002, Russia |
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| Abstract: | The chemical stability and hydrophobic nature of chloroarenes make them a persistent environmental hazard. Modeling of 1,2,4-trichlorobenzene (1,2,4-TCB) degradation in alcohol-water solution under UV irradiation was carried out with the aim of probing how the 1,2,4-TCB might behave in the environment. The photocatalytic activity of both bare TiO2 and TiO2 doped by colloidal CdS nanoparticles synthesized by the sol-gel method has been investigated in the processes of 1,2,4-TCB photodegradation in the aqueous protic solvent. Non-sensitized TiO2 cannot be regarded as catalyst for the 1,2,4-TCB photodecomposition. On the contrary, the CdS/TiO2 composite accelerated the 1,2,4-TCB photodegradation process. The concentration of CdS/TiO2 was shown to effect on the 1,2,4-TCB photolysis mechanisms, which resulted in the quantitative ratios of the 1,2,4-TCB photolysis products. |
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| Keywords: | Trichlorobenzenes Photocatalyst Photodegradation Photolysis mechanisms |
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