Síntesis y caracterización de Ti1-xMnxO2 para su uso como fotocatalizador

Abihu Ramírez-Martínez; Ariadna Sánchez-Castillo; Lis Tamayo-Rivera; María del Pilar Gutiérrez-Amador

doi:10.29057/icbi.v9iEspecial2.7988

Abihu Ramírez-Martínez Universidad Autónoma del Estado de Hidalgo https://orcid.org/0000-0002-5760-2366
Ariadna Sánchez-Castillo Universidad Autónoma del Estado de Hidalgo https://orcid.org/0000-0001-6564-9837
Lis Tamayo-Rivera Universidad Autónoma del Estado de Hidalgo https://orcid.org/0000-0001-8527-6396
María del Pilar Gutiérrez-Amador Universidad Autónoma del Estado de Hidalgo https://orcid.org/0000-0002-0787-6529

DOI: https://doi.org/10.29057/icbi.v9iEspecial2.7988

Keywords: Titanium dioxide, Nanoparticles, Photocatalysis

Abstract

Heterogeneous photocatalysis using TiO₂ is a degradation technique for organic pollutants present in wastewater effluents. Previous studies report that the UV / TiO₂ process is capable of efficiently decomposing various chlorinated alkenes and other organic compounds. Previous studies have shown that the use of nanoparticles improves photoactive activities relative to their bulk phase counterparts. The incorporation of transition metal dopants in the TiO2 structure can influence the performance of these photocatalysts by modifying the gap energy This work presents the results of the synthesis of solid solutions Ti_1-xMn_xO₂, where 0.02≤x≤0.7, by using the sol-gel technique. X-ray diffraction studies showed the stability of the anatase phase at the different concentrations of Mn^{2 +} analyzed (Ti_1-xMn_xO₂; x = 0.02-0.05) at 500 ° C the nanocrystalline nature of the materials was verified. The band gap energies showed a decrease in their values as the manganese concentration increases.

Downloads

Download data is not yet available.

References

Aguilar Franco, M. (2000). La titania, (TiO2) su importancia y sus aplicaciones. Trabajo monográfico de actualización. Tesis de Licenciatura, Facultad de Química, UNAM.

Aydın, C., Abd El-sadek, M.S., Kaibo Zheng, I.S. Yahia, F. Yakuphanoglu. (2013). Synthesis, diffused reflectance and electrical properties of nanocrystalline Fe-doped ZnO via sol–gel calcination technique. Optics & Laser Technol. 48. 447-452

Bernasik, A., Radecka, M., Rekas, M. and Sloma, M. (1993). Applied Surface Science 65/66, 240.

Berger, H., Tang, H. and Lévy F. (1993), Journal of Crystal Growth 130, 108.

Bersani, D., Antonioli, G., Lucci, P. and López, T. (1997) Materials Science Forum 87, 239.

Castellote M. y Bengtsson N. 2011. Principles of TiO2 Photocatalysis. En Application of Titanium Dioxide Photocatalysis to Construction Materials. RILEM.

Fahlman, B. D. (2008) Materials Chemistry. Springer Science + Bussines Media B.V. The Netherlands.

Font-Alba, M., (1996) Atlas Temático de Mineralogía. Idea Books, S. A. Barcelona.

Hench, L.L. and West, J. K. (1990) The sol-gel process. Chem. Rev. 90, 33-72.

Lalena, J. N., Cleary, E- A., Carpenter, E.E. and Dean, N. F. (2008) Inorganic Materials Synthesis and Fabrication. John Wiley and Sons. New Jersey.

Matos, J., Chovelon, J. M. y Ferronato C. (2009) Mundo Nano, 1(2), 37.

Schrauzer, G. and Guth, T. (1997) Journal of the American Chemical Society 99, 7189.

Mutuma, B. K., Shao, G. N., Kim, W. D., & Kim, H. T. (2015). Sol–gel synthesis of mesoporous anatase–brookite and anatase–brookite–rutile TiO2 nanoparticles and their photocatalytic properties. Journal of Colloid and Interface Science, 442, 1–7.

Tauc, J. et al. (1966) Optical Properties and Electronic Structure of Ge. Phys. Stat. Sol. 15, 627

Vargas W. E. (2011). Difusión y absorción de luz en materiales no homogéneos: Modelo de Kubelka‐Munk . Opt. Pura Apl. 44 (1) 163‐183

Zakrsewska, K., Radecka, M. and Rekas, M. (1997) Thin Solid Films 310