XVII-ICSMV

SYNTHESIS AND PHOTOCATALYTIC EVALUATION OF ELECTROSPUN TIO2 NANOFIBERS DOPED WITH EUROPIUM FOR THE DEGRADATION OF ORGANIC POLLUTANTS.

Not scheduled

1h 30m

Museo Caracol (Ensenada, México)

Poster Luminescence Phenomena: Materials and Applications LUMINESCENCE PHENOMENA

Speaker

Andrea Gonzalez Amezcua (Instituto Politécnico Nacional)

Description

The importance of water treatment cannot be ignored, especially now that the distribution and availability of this resource have been negatively affected, and it is essential for our survival. Photocatalysis is a technique used to degrade the organic pollutants present in industrial water. Titanium dioxide (TiO2) is extensively utilized as a photocatalyst due to its chemical stability, easy production and benign impact on human health and the environment further enhance its appeal as a photocatalytic agent. However, the adsorption of organic pollutants is poor, due to its low ability to harvest sunlight. Enhancing photocatalytic performance can be achieved by doping with europium. The TiO2:Eu3+ with 7.5% and TiO2 nanofibers were fabricated by electrospinning technique. Both nanofibers were calcined at 600°C in an air atmosphere. The nanofibers were characterized by SEM, EDS, XRD, and DRS. SEM images demonstrated that the nanofibers look like network randomly oriented, with some areas with high material density and some empty spaces. From EDS spectra, we confirm the presence of europium in the doped nanofibers. The TiO2 and TiO2:Eu3+ shown the anatase phase. The bandgap was similar in both samples. The photocatalytic test was performed in the degradation of Rhodamine B (RhB) solution at 2.5 ppm and acetaminophen (AMF) at 7 ppm. With a pollutant-photocatalyst ratio of 1mL:1mg. After 6 hours of reaction, 25% of the AMF was degraded with TiO2, but with TiO2:Eu3+ 60% of the AMF had already been degraded. For RhB, in the same 6-hour time, with TiO2 80% of the dye had already degraded, and with TiO2:Eu3+ 90% of the RDB had already degraded. It can be conclude that the presence of europium enhances the photocatalytic response.

This work was supported by

SIP 20241502

Reference

Wang H, Li X, Zhao X, Li C, Song X, Zhang P, et al. A review on heterogeneous photocatalysis for environmental remediation: From semiconductors to modification strategies. Chinese Journal of Catalysis. 43 (2022) 178-214.
https://doi.org/10.1016/S1872-2067(21)63910-4