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Design of titania porous films controlled by precursors’ viscosity for photocatalytic application

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Abstract

Porous transparent films of TiO2 (anatase) were obtained by controlled hydrolysis of titanium tetraisopropoxide (sol-gel method) in the presence of a polyethylene glycol as a template agent with molar masses of 300, 600 and 1000 g/mol and α-terpineol as a high viscosity agent. The efficiency of the films in the photocatalytic degradation of Rhodamine 6G is correlated with their porosity and films’ thickness. Higher photoactivity of the obtained films compared with a non-porous TiO2 film was observed for TiO2(300) and TiO2(600) whereas the lower activity was noted for TiO2(1000). The size of anatase crystals is increased proportionally to the precursor’ gelation time and is accompanied by a decrease of the specific surface area and porosity of the film. The presence of polyethylene glycol slowed down TIPT’s hydrolysis rate. It is shown that the viscosity of the precursor is the key factor in the preparation of titania films with certain crystal size, thickness and high photocatalytic activity.

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Authors and Affiliations

  1. Chuiko Institute of Surface Chemistry of National Academy of Science of Ukraine, Kiev, Ukraine

    I. Petrik, N. Smirnova & A. Eremenko

  2. Institute of Physics, National Academy of Science of Ukraine, Kiev, Ukraine

    E. Frolova & A. Turchin

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  1. I. Petrik
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  2. E. Frolova
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  3. A. Turchin
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  4. N. Smirnova
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  5. A. Eremenko
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Correspondence to I. Petrik.

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Petrik, I., Frolova, E., Turchin, A. et al. Design of titania porous films controlled by precursors’ viscosity for photocatalytic application. Res Chem Intermed 45, 4113–4120 (2019). https://doi.org/10.1007/s11164-019-03894-1

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  • DOI: https://doi.org/10.1007/s11164-019-03894-1

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