High Photocatalytic Activity Nanomaterials Based on Titanium Dioxide


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Аннотация

Abstract—X-ray diffraction, optical spectroscopy, and electron paramagnetic resonance (EPR) have been used to study microspheres and nanoheterostructures based on titanium dioxide synthesized by aerosol pyrolysis and sol–gel methods. All test samples are characterized by a large specific surface area (about 100 m2/g of substance). It was established that the main type of radicals in the resulting structures are N, NO, as well as Ti3+, Mo5+, V4+, and W5+ centers. Microspheres and nanoheterostructures consisting of several metal oxides have high photocatalytic activity in the visible spectrum and the ability to accumulate photogenerated charge carriers. As a result, catalytic reactions in the samples continue even after illumination is turned off. A correlation was found between the rate of photocatalysis and the radical concentration in the studied structures. The results can be used to develop new-generation energy-efficient catalytic devices based on nanocrystalline titanium oxide, which operate in the visible range and do not require continuous illumination.

Авторлар туралы

E. Konstantinova

Moscow State University; National Research Center Kurchatov Institute; Moscow Institute of Physics and Technology

Хат алмасуға жауапты Автор.
Email: liza35@mail.ru
Ресей, Moscow, 119991; Moscow, 123098; Dolgoprudny, 141701

M. Kushnikov

Moscow State University

Email: liza35@mail.ru
Ресей, Moscow, 119991

V. Zaitsev

Moscow State University

Email: liza35@mail.ru
Ресей, Moscow, 119991

V. Kytin

Moscow State University

Email: liza35@mail.ru
Ресей, Moscow, 119991

A. Marikutsa

Moscow State University

Email: liza35@mail.ru
Ресей, Moscow, 119991

G. Trusov

National University of Science and Technology MISIS

Email: liza35@mail.ru
Ресей, Moscow, 119049

A. Sedegov

National University of Science and Technology MISIS

Email: liza35@mail.ru
Ресей, Moscow, 119049

P. Kashkarov

Moscow State University; National Research Center Kurchatov Institute; Moscow Institute of Physics and Technology

Email: liza35@mail.ru
Ресей, Moscow, 119991; Moscow, 123098; Dolgoprudny, 141701

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© Pleiades Publishing, Ltd., 2019