Highly defective dark nano titanium dioxide: Preparation via pulsed laser ablation and application | Научно-инновационный портал СФУ

Highly defective dark nano titanium dioxide: Preparation via pulsed laser ablation and application

Тип публикации: статья из журнала

Год издания: 2020

Идентификатор DOI: 10.3390/ma13092054

Ключевые слова: Antibacterial properties, Calcination, Dark titania, Defects, Nanopowders, Phenol, Photocatalysis, Pulsed laser ablation in liquidAblation, Catalyst activity, Electronic structure, Escherichia coli, High resolution transmission electron microscopy, Laser ablation, Light, Light absorption, Neodymium lasers, Photocatalytic activity, Scanning electron microscopy, Semiconductor lasers, Semiconductor materials, Staphylococcus aureus, Temperature, Thermogravimetric analysis, Titanium dioxide, Ultraviolet visible spectroscopy, Yttrium aluminum garnet, Anti-bacterial activity, Laser ablation in liquid, Nano-titanium dioxide, Phenol photodegradation, Scanning calorimetry, UV-vis spectroscopy, Visible light absorption, X-ray photoelectrons, Pulsed lasers, dark titania; pulsed laser ablation in liquid; defects; calcination; nanopowders; photocatalysis; phenol; antibacterial properties

Аннотация: The development of methods to synthesize and study the properties of dark titania is of the utmost interest due to prospects for its use, primarily in photocatalysis when excited by visible light. In this work, the dark titania powder was prepared by pulsed laser ablation (Nd:YAG laser, 1064 nm, 7 ns) in water and dried in air. To study the changes occurring in the material, the thermal treatment was applied. The structure, composition, and properties of the obtained powders were studied using transmission electron microscopy, low-temperature N2 adsorption/desorption, X-ray diffraction, thermogravimetry/differential scanning calorimetry, X-ray photoelectron, Raman and UV-vis spectroscopies, and photoluminescence methods. The processes occurring in the initial material upon heating were studied. The electronic structure of the semiconductor materials was investigated, and the nature of the defects providing the visible light absorption was revealed. The photocatalytic and antibacterial activities of the materials obtained were also studied. Dark titania obtained via laser ablation in liquid was found to exhibit catalytic activity in the phenol photodegradation process under visible light (>420 nm) and showed antibacterial activity against Staphylococcus aureus and bacteriostatic effect towards Escherichia coli.

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Издание

Журнал: Materials

Выпуск журнала: vol. 13, Is. 9

Номера страниц: 2054

ISSN журнала: 19961944

Издатель: MDPI AG

Авторы

  • Fakhrutdinova E.D. (Laboratory of Advanced Materials and Technology, Tomsk State University, Tomsk, 634050, Russian Federation)
  • Shabalina A.V. (Laboratory of Advanced Materials and Technology, Tomsk State University, Tomsk, 634050, Russian Federation)
  • Gerasimova M.A. (Laboratory of Biophotonics, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation)
  • Nemoykina A.L. (Laboratory of Biopolymers and Biotechnology, Tomsk State University, Tomsk, 634050, Russian Federation)
  • Vodyankina O.V. (Laboratory of Catalytic Research, Tomsk State University, Tomsk, 634050, Russian Federation)
  • Svetlichnyi V.A. (Laboratory of Advanced Materials and Technology, Tomsk State University, Tomsk, 634050, Russian Federation)

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