Indexado en

Licencia y uso

Citaciones

Altmetrics

Grant support

This work was supported by project PDC-2022-133805-100, funded by the Ministry of Science, Innovation, and Universities of Spain. The authors are grateful for the computational resources provided by the SciCom Lab of the Department of Physics at UFES. They also acknowledge financial support from the Brazilian funding agencies FAPES, CAPES, and CNPq. Wendel S. Paz thanks FAPES (grants 444/2021, 1044/2022, and 1081/2022P:2022-8L35F) and CNPq (grant 409441/2021-0) for their financial support. Jefferson E. Silveira acknowledges support from CAPES: Science Without Borders Program, Ministry of Education Brazil (grant BEX-1046/13-6) .

Análisis de autorías institucional

Compartir

FeTiO3: A low-cost and efficient photocatalytic mineral for sustainable NOx abatement

Publicado en:SEPARATION AND PURIFICATION TECHNOLOGY. 357 130217- - 2025-05-01 357(), DOI: 10.1016/j.seppur.2024.130217

Autores: Silveira, JE; Casas, JA; Zazo, JA; Garcia, VG; Pacheco, LT; Paz, WS

Afiliaciones

Resumen

This study investigates the potential of FeTiO3 as a photocatalyst for the removal of nitrogen oxides (NOx) from gas streams, a critical environmental and health concern. The photocatalytic activity of FeTiO3 was evaluated across a range of operational parameters, with initial NO concentrations set from 5 to 50 ppmv and gas hourly space velocity (GHSV) values of 18, 36, and 54 h- 1 . The findings demonstrate that FeTiO3 effectively converts NOx, even at room temperature and under saturated atmosphere, with a clear correlation between the photo- catalytic removal efficiency and both the initial NO concentration and GHSV. A rigorous mechanism for the photooxidation of NO to nitrate via NO2 was proposed based on these experimental results and the surface characterization of raw and used ilmenite, corroborated by DFT calculations. These outcomes would allow widening the application of air pollution control strategies to flue gas with relatively low NOx concentration and low temperature, where other NOx control techniques show severe drawbacks. Therefore, this research contributes to the development of efficient and sustainable approaches for air quality improvement using photo- catalytic systems.

Palabras clave