V. B. Vykhodets, T. E. Kurennykh

EFFECT OF LOW-TEMPERATURE ANNEALING IN AIR ON THE DEFECT STRUCTURE OF OXIDE NANOPARTICLES

It has been found that low-temperature annealing in air changes the defect structure of YSZ10 oxide nanoparticles synthesized by means of the laser evaporation of a ceramic target. The study is carried out with the use of deuterium probes. At a temperature of 350 ℃, with increasing annealing time, a monotonic decrease in the concentration of oxygen vacancies near the surface of nanoparticles is observed. This dependence is extreme at 200 ℃; at its first stage, the concentration of vacancies in the surface atomic layer of nanoparticles increases with time. An approach is proposed for the synthesis of nanoparticles with severe oxygen deficiency near the surface of oxide nanoparticles.

Acknowledgments: The research was carried out under the state assignment from the Ministry of Science and Higher Education of the Russian Federation (theme Function, No. 122021000035-6).

References:

1. Chen, Z., Zhao, Y., Ma, J., Liu, C., and Ma, Y. Detailed XPS analysis and anomalous variation of chemical state for Mn- and V-doped TiO2 coated on magnetic particles. Ceramics International, 2017, 43 (18), 16763–16772. DOI: 10.1016/j.ceramint.2017.09.071.
2. Salazar Cuaila, J.L., Alayo, W., and Avellaneda, C.O. Ferromagnetism in spin-coated cobalt-doped TiO2 thin films and the role of crystalline phases. Journal of Magnetism and Magnetic Materials, 2017, 442, 212–217. DOI: 10.1016/j.jmmm.2017.06.122.
3. Li, D., Li, D.K., Wu, H.Z., Liang, F., Xie, W., Zou, C.W., and Shao, L.X. Defects related room temperature ferromagnetism in Cu-implanted ZnO nanorod arrays. Journal of Alloys and Compounds, 2014, 591, 80–84. DOI: 10.1016/j.jallcom.2013.11.205.
4. Kamat, P.V. TiO2 nanostructures: recent physical chemistry advances. The Journal of Physical Chemistry C, 2012, 116 (22), 11849–11851. DOI: 10.1021/jp305026h.
5. Jraba, A., Anna, Z., and Elaloui, E. Effects of Sr2+, Fe3+ and Al3+ doping on the properties of TiO2 prepared using the sol–gel method. Comptes Rendus Chimie, 2019, 22, 648–658. DOI: 10.1016/j.crci.2019.10.003.
6. Krutikova, I., Ivanov, M., Murzakaev, A., and Nefedova, K. Laser-synthesized Ce3+ and Pr3+ doped Y2O3 nanoparticles and their characteristics. Materials Letters, 2020, 265, 127435. DOI: 10.1016/j.matlet.2020.127435.
7. Ghosh, S. and Nambissan, P.M.G. Evidence of oxygen and Ti vacancy induced ferromagnetism in post-annealed undoped anatase TiO2 nanocrystals: a spectroscopic analysis. Journal of Solid State Chemistry, 2019, 275, 174–180. DOI: 10.1016/j.jssc.2019.04.010.
8. Gunkel, F., Christensen, D.V., Chen, Y.Z., and Pryds, N. Oxygen vacancies: the (in)visible friend of oxide electronics. Applied Physics Letters, 2020, 116, 120505. DOI: 10.1063/1.5143309.
9. Liu, T., Chen, W., Ju, H., Yan, S., and Ma, W. Characterization of YSZ ceramic nanopowders synthesized at different temperatures via polyacrylamide gel method. J. Wuhan Univ. Technol.-Mat. Sci. Edit., 2020, 35, 528–534. DOI: 10.1007/s11595-020-2289-2.
10. Vykhodets, V.B. and Kurennykh, T.E. Characterization of defect structure of oxide nanoparticles with the use of deuterium probes. RSC Advances, 2020, 10, 3837–3843. DOI: 10.1039/C9RA05451K.
11. Jarvis, E.A.A., Carter, E.A. Metallic character of the Al2O3(0001)-(√31×√31)R±9° surface reconstruction. The Journal of Physical Chemistry B, 2001, 105 (18), 4045–4052. DOI: 10.1021/jp003587c.
12. Vykhodets, V.B., Jarvis, E.A.A., Kurennykh, T.E., Beketov, I.V., Obukhov, S.I., Samatov, O.M., Medvedev, A.I., Davletshin, A.E., and Whyte, T. Inhomogeneous depletion of oxygen ions in oxide nanoparticles. Surface Science, 2016, 644, 141–147. DOI: 10.1016/j.susc.2015.10.011.
13. Brunauer, S., Emmett, P.H., and Teller, E. Adsorption of gases in multimolecular layers. Journal of the American Chemical Society, 1938, 60 (2), 309–319. DOI: 10.1021/JA01269A023.
14. Vykhodets, V.B., Nefedova, O.A., Obukhov, S.I., Kurennykh, T.E., Danilov, S.E., and Vykhodets, E.V. Application of the nuclear reaction analysis online technique to study the diffusion of deuterium in metals. JETP Letters, 2018, 107, 211–215. DOI: 10.1134/S0021364018040148.

Article reference