E. V. Mostovshchikova, B. A. Gizhevsky, L. V. Ermakova

IR ABSORPTION SPECTRA OF TiO₂ SUBMICRON POWDERS SYNTHESIZED BY THE COMBUSTION METHOD

A method for synthesizing titanium dioxide using a combustion reaction has been developed, and TiO₂ powders with anatase structure have been obtained. The average particle size
(~ 500 nm) and the size of the coherent scattering region (~ 15 nm) are determined, as well as the specific surface, which depends on the type of fuel used in the reaction (5.5 m²/g for glycine and 30.5 m²/g for citric acid). Annealing in the air at temperatures up to T = 1050 °C leads to a change in the structural modification, resulting in powders with a rutile structure. The IR optical density spectra D(λ) (1 to 12 μm) of TiO2 powders are studied. The intense absorption band in the spectra is found, the position of which depends on the structural modification of TiO₂ (1.8 μm to 3.1 μm). The analysis of the D(λ) spectra demonstrates that this band is a superposition of two absorption bands, one of which has a maximum at 1.2 μm and can be associated with Ti³⁺ ions, the other being due to the polaron-type charge carriers.

References:

1. Hu X., Li. G., Yu J.C. Design, Fabrication, and Modification of Nanostructured Semiconductor Materials for Environmental and Energy Applications. Langmuir, 2010, vol. 26, no. 5, pp. 3031–3039. DOI: 10.1021/la902142b2
2. Gupta S.M., Tripathi M. A review of TiO2 nanoparticles. Chinese Sci. Bull., 2011, vol. 56, pp. 1639–1657. DOI: 10.1007/s11434-011-4476-13
3. Augugliaro V., Palmisano L., Sclafani A., Minero C., Pelizzetti E. Photocatalytic degradation of phenol in aqueous titanium dioxide dispersions. Toxicological and Environmental Chemistry, 1988, vol. 16, pp. 89–109. DOI: 10.1080/027722488093572534
4. Muscat J., Swamy V., Harrison N.M. First-principles calculations of the phase stability of TiO2. Physical Review B, 2002, vol. 65, pp. 224112. DOI: 10.1103/PhysRevB.65.2241125
5. Tanaka K., Capule M.F.V., Hisanaga T. Effect of crystallinity of TiO2 on its photocatalytic action. Chem. Phys. Lett., 1991, vol. 187, pp. 73–76. DOI: 10.1016/0009-2614(91)90486-S6
6. Yang H., Zhu S., Pan N. Studying the mechanisms of titanium dioxide as ultravioletblocking additive for films and fabrics by an improved scheme. J. Appl. Polym. Sci., 2004, vol. 92, pp. 3201–3210. DOI: 10.1002/app.203277
7. Kuznetsov V.N., Serpone N. On the Origin of the Spectral Bands in the Visible Absorption Spectra of Visible-Light-Active TiO2 Specimens Analysis and Assignments. J. Phys. Chem. C, 2009, vol. 113, pp. 15110–15123. DOI: 10.1021/jp901034t8
8. Tealdi C., Quartarone E., Galinetto P. et al. Flexible deposition of TiO2 electrodes for photocatalytic applications: Modulation of the crystal phase as a function of the layer thickness. J. Solid State Chem., 2013, vol. 199, pp. 1–6. DOI: 10.1016/j.jssc.2012.11.0199
9. Vargesse A.A, Muralidhazan K. Anatase–brookite mixed phase nano TiO2 catalyzed homolytic decomposition of ammonium nitrate. J. Hazard. Mater., 2011, vol. 192, iss. 3, pp. 1314–1320. DOI: 10.1016/j.jhazmat.2011.06.03610
10. Gonzalez R.J., Zallen R., Berger H. Infrared reflectivity and lattice fundamentals in anatase TiO2. Physical Review B, 1997, vol. 55, pp. 7014–7017. DOI: 10.1103/PhysRevB.55.701411
11. Qu Z.-W., Kroes G.-J. Theoretical Study of the Electronic Structure and Stability of Titanium Dioxide Clusters (TiO₂)_n with n=1–9. J. Phys. Chem. B, 2006, vol. 110, pp. 8998–9007. DOI: 10.1021/jp056607p12
12. Zanatta A.R. A fast-reliable methodology to estimate the concentration of rutile or anatase phases of TiO2. In: AIP Advances, 2017, vol. 7, pp. 075201. DOI: 10.1063/1.499213013
13. Liu L., Zhao C., Li Y. Spontaneous Dissociation of CO2 to CO on Defective Surface of Cu(I)/TiO2−x Nanoparticles at Room Temperature. J. Phys. Chem. C, 2012, vol. 116, pp. 7904–7912. DOI: 10.1021/jp300932b14
14. Wu J., Huang C. In situ DRIFTS study of photocatalytic CO2 reduction under UV irradiation. Front. Chem. Eng. China, 2010, vol. 4, pp. 120–126. DOI: 10.1007/s11705-009-0232-315
15. Sarkar T., Gopinadhan K., Zhou J., Saha S., Coey J.M.D., Feng Y.P., Ariando, Venkatesan T. Electron Transport at the TiO2 Surfaces of Rutile, Anatase, and Strontium Titanate: The Influence of Orbital Corrugation. ACS Applied Materials & Interfaces, 2015, vol. 7, no. 44, pp. 24616–24621. DOI: 10.1021/acsami.5b06694

Article reference