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Description
The elimination of dyes in the effluents of the textile industry currently represents a technological challenge in wastewater treatment processes, the present study reports on the evaluation of the photocatalytic properties of TiO2 nanostructures with controlled crystalline structure and immobilized on glass substrates. Using the dipping technique, electrospun TiO2 nanofibers were deposited on the glass substrate. Scanning electron microscopy (SEM) allowed us to corroborate the presence of the films formed by the nanostructures. Furthermore, Raman scattering and X-ray diffraction confirmed that the phase present is anatase. Azo-type reactive dyes were used to evaluate the photocatalytic properties under UV light exposure. FTIR spectroscopy was used to monitor the bands assigned to the dye chromophore, which decreased as a function of time. The kinetics of the reaction were also followed by UV-vis spectroscopy, measuring the intensity of the main absorption bands. The absorbance spectra showed a gradual decrease in this band, obtaining discolorations close to 100% in a time of approximately 70 min, which can be attributed to its high surface area and the incorporation of impurities that benefit the photocatalysis process.
Reference
L. Núñez, J. García-Hortal, and F. Torrades, Study of kinetic parameters related to the decolourization and mineralization of reactive dyes from textile dyeing using Fenton and photo-Fenton processes. Dyes and Pigments, 75 (2006) 647-652. https://doi.org/10.1016/j.dyepig.2006.07.014
This work was supported by
The authors are grateful for the financial support provided by CONAHCYT for the realization of this research work.
| Keywords | Titanium dioxide, Immobilized TiO2 nanofibers, Textile dyes |
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| Author approval | I confirm |
| Author will attend | I confirm |
