High Photocatalytic Efficiency of Al2O3-TiO2 Coatings on 304 Stainless Steel for Methylene Blue and Wastewater Degradation-Reference-Cited by-同舟云学术

High Photocatalytic Efficiency of Al2O3-TiO2 Coatings on 304 Stainless Steel for Methylene Blue and Wastewater Degradation

Published:2023-10-07 Issue:10 Volume:13 Page:1351
ISSN:2073-4344
Container-title:Catalysts
language:en
Short-container-title:Catalysts

Author:

Camacho-González Mónica Araceli¹²^ORCID,Lijanova Irina Victorovna¹^ORCID,Reyes-Miranda Joan³,Sarmiento-Bustos Estela⁴,Quezada-Cruz Maribel²,Vera-Serna Pedro⁵^ORCID,Barrón-Meza Miguel Ángel³^ORCID,Garrido-Hernández Aristeo²

Affiliation:

1. Centro de Investigación e Innovación Tecnológica, Instituto Politécnico Nacional, Ciudad de México 02250, Mexico

2. División Químico Biológicas, Universidad Tecnológica de Tecámac, Tecámac 55740, Mexico

3. Departamento de Ciencia de los Materiales, Universidad Autónoma Metropolitana-Azcapotzalco, Ciudad de México 02200, Mexico

4. División de Mecánica Industrial, Universidad Tecnológica Emiliano Zapata del Estado de Morelos, Emiliano Zapata 62765, Mexico

5. División de Ingeniería, Universidad Politécnica de Tecámac, Tecámac 55740, Mexico

Abstract

This work explores the novelty of achieving high photocatalytic efficiency and remarkable bactericidal activity with Al2O3-TiO2 coatings on perforated 304 stainless steel (SS) substrates, placed transversely along an airlift reactor of 0.980 L for wastewater treatment under visible light irradiation. The Al2O3-TiO2 coatings achieved methylene blue and total organic carbon (TOC) concentration reductions of 97.3 and 96.51%, respectively, in a wastewater sample with heterogeneous photocatalsis. The Al2O3-TiO2 coatings resulted in a 33.30% reduction in total and fecal coliforms and a remarkable 94.23% decrease in Salmonella spp. in the wastewater sample. XRD confirmed the TiO2 anatase–rutile phases and Al2O3 α-γ phases in the coating. The particle size distribution ranges from 100 to 500 nm, and the coating surface was homogeneous without cracks confirmed using SEM and AFM, respectively. The roughness and thickness of the coatings were 85 ± 5 nm and 250 ± 50 nm, respectively.

Publisher

MDPI AG

Subject

Physical and Theoretical Chemistry,Catalysis,General Environmental Science

Link

https://www.mdpi.com/2073-4344/13/10/1351/pdf

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