Electron structure of TiO₂ composite films with noble metal nanoparticles

Домашня сторінка
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Фізико-технічні та математичні науки
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Відділення фізики і астрономії
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Semiconductor Physics Quantum Electronics & Optoelectronics
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Semiconductor Physics Quantum Electronics & Optoelectronics, 2014, том 17
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Semicond. Physics Quantum Electronics & Optoelectronics, 2014, № 1
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Electron structure of TiO₂ composite films with noble metal nanoparticles

Busko, T.O. ; Kulish, M.P. ; Dmytrenko, O.P. ; Vityuk, N.V. ; Eremenko, A.M.

Інший ID: PACS 61.72.jn, 71.55.-i, 73.61.-r, 78.20.-e, 78.40.Fy

URI: http://dspace.nbuv.gov.ua/handle/123456789/118358

Посилання: Electron structure of TiO₂ composite films with noble metal nanoparticles / T.O. Busko, M.P. Kulish, O.P. Dmytrenko, N.V. Vityuk, A.M. Eremenko // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2014. — Т. 17, № 1. — С. 67-74. — Бібліогр.: 19 назв. — англ.

Дата: 2014

Завантажень: 450

Electron structure of TiO₂ composite films with noble metal nanoparticles

Анотація:

Thin nanocrystalline films of ТіО₂, TiO₂/ZrO₂, TiO₂/ZrO₂/SiO₂, TiO₂/ZrO₂/SiO₂/Ag and TiO₂/ZrO₂/SiO₂/Au were prepared using the sol-gel synthesis method. In this paper, we determined the bandgap for direct and indirect band-to-band transitions. Optical conductivity of the films was determined using the spectral ellipsometry method. Depending on the nanocomposite composition, optical conductivity is of different character due to light absorption caused by the presence of the structure intrinsic defects: oxygen vacancies (F²⁺, F, and F⁺ centers), Ti³⁺ ions and interstitial Ti atoms. Rearrangement of the electron spectrum in these thin films due to the aforementioned defects can improve photocatalytic activity in the UV and visible spectral ranges.

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