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Mesoporous TiO2 anatase films for enhanced photocatalytic activity under UV and visible light.

ABSTRACT: Mesoporous TiO2 films with enhanced photocatalytic activity in both UV and visible wavelength ranges were developed through a non-conventional atomic layer deposition (ALD) process at room temperature. Deposition at such a low temperature promotes the accumulation of by-products in the amorphous TiO2 films, caused by the incomplete hydrolysis of the TiCl4 precursor. The additional thermal annealing induces the fast recrystallisation of amorphous films, as well as an in situ acidic treatment of TiO2. The interplay between the deposition parameters, such as purge time, the amount of structural defects introduced and the enhancement of the photocatalytic properties from different mesoporous films clearly shows that our easily upscalable non-conventional ALD process is of great industrial interest for environmental remediation and other photocatalytic applications, such as hydrogen production.

SUBMITTER: Ishchenko OM 

PROVIDER: S-EPMC9057303 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature

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Mesoporous TiO<sub>2</sub> anatase films for enhanced photocatalytic activity under UV and visible light.

Ishchenko Olga M OM   Lamblin Guillaume G   Guillot Jérôme J   Infante Ingrid C IC   Guennou Maël M   Adjeroud Noureddine N   Fechete Ioana I   Garin Francois F   Turek Philippe P   Lenoble Damien D  

RSC advances 20201016 63

Mesoporous TiO<sub>2</sub> films with enhanced photocatalytic activity in both UV and visible wavelength ranges were developed through a non-conventional atomic layer deposition (ALD) process at room temperature. Deposition at such a low temperature promotes the accumulation of by-products in the amorphous TiO<sub>2</sub> films, caused by the incomplete hydrolysis of the TiCl<sub>4</sub> precursor. The additional thermal annealing induces the fast recrystallisation of amorphous films, as well as  ...[more]

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