Tailoring crystallisation of anatase TiO2 ultra-thin films grown by atomic layer deposition using 2D oxides as growth template

Grishin, André; Bérini, Bruno; Vallet, Maxime; Hurand, Simon; Maudet, Florian; Sartel, Corinne; Frégnaux, Mathieu; Nowak, Sophie; Amiri, Gaelle; Hassani, Said; Aureau, Damien; Sallet, Vincent; Demange, Valérie; Dumont, Yves

doi:10.1016/j.apsusc.2023.158446

Applied Surface Science

2023

DOI: 10.1016/j.apsusc.2023.158446

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Tailoring crystallisation of anatase TiO2 ultra-thin films grown by atomic layer deposition using 2D oxides as growth template

André Grishin,

Bruno Bérini,

Maxime Vallet

et al.

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2024

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Cited by 6 publications

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Enhanced Photocatalytic Activity of Anatase/Rutile‐Mixed Phase Titanium Dioxide Nanoparticles Annealed with Polyethylene Glycol at Low Temperatures in Aluminum Foil‐Covered Combustion Boats

Kawakami,

Matsumoto,

Yanagiya

et al. 2024

Physica Status Solidi (a)

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A facile carbon‐doping process is proposed to enhance the photocatalytic activity of anatase/rutile‐mixed phase TiO2 nanoparticles using polyethylene glycol (PEG). The TiO2‐PEG composite is loaded into a boat and covered tightly with Al foil to increase the pressure inside that boat during annealing. The boat is annealed for 1 h at different temperatures and PEG ratios. The annealing with 30% PEG at 300 °C enhances the decomposition of organic pollutants and bacterial inactivation under 405 nm light compared to the annealing without Al films. This annealing causes 2.5–3% carbon doping, introduces more oxygen vacancies, and converts PEG into organic compounds rich in CC bond components. These modifications of TiO2 can be attributed to carbon‐centered radicals produced from PEG during annealing. The modifications change the band structure to enhance the photogenerated carrier concentration responsible for the photocatalytic activity. The carbon doping narrows the anatase and rutile bandgaps, allowing the anatase phase to absorb 405 nm light. The introduced oxygen vacancies increase the electron‐trapping sites and raise the adsorbed oxygen groups enhancing the upward band bending and the depletion layer depth at the surface. The PEG‐converted compounds can transfer photogenerated electrons within the compounds to the TiO2 conduction band.

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Enhanced Photocatalytic Activity of Anatase/Rutile‐Mixed Phase Titanium Dioxide Nanoparticles Annealed with Polyethylene Glycol at Low Temperatures in Aluminum Foil‐Covered Combustion Boats

Kawakami,

Matsumoto,

Yanagiya

et al. 2024

Physica Status Solidi (a)

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Synthesis of titanium dioxide thin films via thermo- and plasma-enhanced atomic layer deposition

Ambartsumov,

Chapura,

Tarala

2024

Applied Surface Science

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Morphology and photocurrent response of TiO2 nanotubes prepared in electrolytes containing different content of polyethylene glycol

Li,

et al. 2024

Ceramics International

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Tailoring crystallisation of anatase TiO2 ultra-thin films grown by atomic layer deposition using 2D oxides as growth template

Cited by 6 publications

References 62 publications

Enhanced Photocatalytic Activity of Anatase/Rutile‐Mixed Phase Titanium Dioxide Nanoparticles Annealed with Polyethylene Glycol at Low Temperatures in Aluminum Foil‐Covered Combustion Boats

Enhanced Photocatalytic Activity of Anatase/Rutile‐Mixed Phase Titanium Dioxide Nanoparticles Annealed with Polyethylene Glycol at Low Temperatures in Aluminum Foil‐Covered Combustion Boats

Synthesis of titanium dioxide thin films via thermo- and plasma-enhanced atomic layer deposition

Morphology and photocurrent response of TiO2 nanotubes prepared in electrolytes containing different content of polyethylene glycol

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