Publicación

Tipo de publicación: Artículos científicos (Publicados en revistas de divulgación o científicas)

Título del artículo: TiO2 Nanoparticles Immobilized on Mortar Spheres as a Strategy for Efficient Photocatalyst Reuse: New UV Reactor Design for Dye Removal

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Año de publicación: 2026

Resumen: TiO2 nanoparticles were immobilized on mortar spheres and subsequently
packed into a tubular reactor equipped with a concentrical submergible UV
lamp for photocatalytic decolorization of aniline blue solution. The
microstructure and chemical composition of TiO2 layer on the spheres, the
efficiency for aniline decolorization, and the durability of the TiO2 coating were
studied. In this work, the mean thickness of the TiO2 layer was 4.01 ± 0.55 ?m,
while the mean mass loading on the substrate was 5.6 ± 0.61 mg/cm2. Then, the
photocatalytic reactor showed excellent performance for dye removal, reaching
levels between 95%–97% in 150 min under UV light. Moreover, by radical
scavenging experiments, h+, O2
.-, and ·OH were identified as the main
reactive species. Even after twenty consecutive cycles, the removal
efficiencies were higher than 83% and the decrease of efficiency was related
to the partial detachment of the TiO2 layer (mean thickness decreased to
2.17 ?m) which was verified by FESEM-EDX and metallographic microscopy.
Finally, based on results, it is worth noting that the effective immobilization of
TiO2 photocatalyst on the mortar spheres as substrate facilitates catalyst
recovery, improves recyclability, and enables continuous water treatment.
Therefore, this technology is a promising option for the removal of dyes in
water, we even suggest that the proposed photocatalytic reactor could be
scaled up for the treatment of effluents from textile industries, contributing
to the abatement of water pollution.

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Autor(es): Cob-Cantú, J. R., López-Velázquez, K., Ronderos-Lara, J. G., Hoil-Canul, E. R., Castillo-Quevedo, C., Maldonado-Lopez, L. A., & Cabellos-Quiroz, J. L.

Campo: Materiales y tratamiento de aguas

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