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Potential Role of Exciton in Photocatalysis

Photocatalysis: Research and Potential. 2024, 1(1), 10005;
Department of Physics, Saint-Petersburg State University, Ul’yanovskaya str., 1, Saint-Petersburg 198504, Russia
Authors to whom correspondence should be addressed.

Received: 29 May 2023    Accepted: 23 Aug 2023    Published: 31 Aug 2023   


This article commemorates the outstanding Russian scientists E.F. Gross and A.N. Terenin. It revisits their successors’ efforts to develop Terenin’s idea of using excitons, discovered by Gross, for photocatalytic redox reactions on wide-gap semiconductors. Terenin proposed ZnO as the subject of study. To explore the possibility of replacing photogenerated electrons and holes in a redox reaction by an exciton being a quasi-neutral particle, the test reaction of the photoactivated oxygen isotope exchange (POIE) was studied. It was found that many years of initial unsuccessful attempts were due to the fact that the exciton energy is spent on luminescence. In our experiments, the excitons decayed non-radiatively, and the long-lived electron-donor F-type and hole V-type active centers were formed by creating the 2D surface nanostructure ZnO/ZnO1−x/O. These centers allowed to obtain the reaction efficiency 5–8 times higher than with the interband transitions. Thus, the developed 2D surface nanostructure ZnO/ZnO1−x/O resolved the problem of using an exciton in photocatalysis and demonstrated the perspective of this nanostructure as an efficient photocatalyst.


Gross EF, Karryev NA. Opticheskii spektr eksitona. Doklady Akademii Nauk USSR 1952, 84, 471–474 (In Russian).
Terenin AN. Release of adsorbed gases from metals and semiconductors and their adsorption under the action of light. Probl. Kinet. Catal. 1955, 8, 17 (In Russian).
Gross EF, Novikov BV. The Fine Structure of the Spectral Curves of Photoconductivity.  J. Phys. Chem. Sol. 1961, 22, 87–100. [Google Scholar]
Formenti M, Courbon H, Juillet F, Lissatсhenko A, Martin JR, Meriaudeau P, et al. Photointeraсtion between Oxygen and Nonporous Partiсles of Anatase.  J. Vac. Sci. Techn. 1972, 9, 947–952. [Google Scholar]
Courbon H, Formenti M, Pichat P. Study of Oxygen Isotopic Exchange over Ultraviolet Irradiated Anatase Samples and Comparison with the Photooxidation of Isobutane into Acetone.  J. Phys. Chem. 1977, 81, 550−554. [Google Scholar]
Tkalich VS, Lisachenko AA. The Mechanism of Photoactivation of Isotopic Exchange of Oxygen Adsorbed on ZnO.  Sov. J. Chem. Phys. 1990, 6, 1264. [Google Scholar]
Pichat P, Courbon H, Enriquez R, Tan TTY, Amal R. Light-Induced Isotopic Exchange between O2 and Semiconductor Oxides, a Characterization Method That Deserves Not to Be Overlooked. Res. Chem. Intermed. 2007, 33, 239−250. [Google Scholar]
Titov VV, Mikhaylov RV, Lisachenko AA. Spectral Features of Photostimulated Oxygen Isotope Exchange and NO Adsorption on “Self-Sensitized” TiO2−x/TiO2 in UV−Vis Region.  J. Phys. Chem. C 2014, 118, 21986−21994. [Google Scholar]
Titov VV, Lisachenko AA, Akopyan IK, Labzowskaya ME, Novikov BV. On the Nature of the Effect of Adsorbed Oxygen on the Excitonic Photoluminescence of ZnO.  J. Lumin. 2018, 195, 153−158. [Google Scholar]
Titov VV, Lisachenko AA, Akopyan IK, Labzovskaya ME, Novikov BV. Long-Lived Photocatalysis Centers Created in ZnO via Resonant Exciton Excitation.  Phys. Solid State 2019, 61, 2134–2138. [Google Scholar]
Aprelev A, Lisachenko A, Laiho R, Pavlov A, Pavlova Y. UV ( = 8.43 eV) photoelectron spectroscopy of porous silicon near Fermi level.  Thin Solid Films 1997, 297, 142–144. [Google Scholar]
Blashkov, Ilya V., Basov, Lev L. and Lisachenko, Andrey A. Photocatalytic Reaction NO + CO + → CO2 + 1/2N2 Activated on ZnO1−x in the UV–Vis Region. J. Phys. Chem. C 2017, 121, 28364–28372. [Google Scholar]
Titov VV, Lisachenko AA, Labzovskaya ME, Akopyan IK, Novikov BV. Exciton Channel of Photoactivation for Redox Reactions on the Surface of 2D ZnO Nanostructures.  J. Phys. Chem. C 2019, 123, 27399−27405. [Google Scholar]
Titov VV, Lisachenko AA. Modeling of the Kinetics of Photoactivated Isotope Exchange O2 ⇄ ZnO in a Flow-Through Reactor. Kinet. Catal. 2021, 62, 900–905. (Russian Text: Kinetika i Kataliz 2021, 62, 29–37).
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