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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) .

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Casas J.a.AuthorZazo J.a.Author
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Article

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

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

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

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Abstract

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.

Keywords
Air pollutionAtomDegradationDft calculationsIlmeniteNanoparticlesNoNo xOxidationPhotocatalysisReductionRemoval

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal SEPARATION AND PURIFICATION TECHNOLOGY due to its progression and the good impact it has achieved in recent years, according to the agency WoS (JCR), it has become a reference in its field. In the year of publication of the work, 2025, it was in position 15/170, thus managing to position itself as a Q1 (Primer Cuartil), in the category Engineering, Chemical. Notably, the journal is positioned above the 90th percentile.

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-05-07:

  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 5 (PlumX).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is: