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Photoreduction of methylene blue using nanoporous composite materials

Year: 2025
Type: article
Abstract: Currently, the application of semiconductor materials for environmental remediation is very common, especially in the area of ​​photocatalysis. However, these materials are very deficient because they do not have a large surface area. Therefore, it is important to generate advanced materials that combine their properties, such as combining semiconductor materials with porous materials such as zeolites. In this work, Titanium Oxide (TiO2) nanoparticles were synthesized by the Sol-Gel method, subsequently natural Zeolites (Erionite, Clinoptilolite and Mordenite) were added to obtain Titanium Oxide/Zeolites (TiO2/Zeolites) compounds. Furthermore, these composite materials were subjected to heat treatment at 500°C. The compounds were characterized by X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) and nitrogen (N2) adsorption. Using XRD, the different crystallographic structures were determined, being anatase (TiO2), hexagonal (Erionite), monoclinic (Clinoptilolite) and orthorhombic (Mordenite). Furthermore, thanks to EDS, the elemental composition of each compound in relation to oxides was determined. While the diameters and volume of the pores were determined in the adsorption of N2 by various methods, where the sample with the lowest surface area was Titanium Oxide -Clinoptilolite (25-75) (TiO2-Cli (25-75)) with a value of 14.1 m2/g and the one with the highest surface area was Titanium Oxide -Mordenite (25-75) (TiO2-Mor (25- 75)) with a value of 456 m2/g, which means that this sample is the one with the highest adsorption. The samples were irradiated with a UV lamp of length 254 nm in methylene blue to photodegrade. Giving optimal results in samples with greater surface area.
DOI: 10.1016/j.rineng.2025.104662
Language: English
Field: Energy
Open Access status: gold
Estimated APC paid: $1,940
OpenAlex ID: W4408514376
FWCI: 0.279
Cites: 46
Cited by: 2
Related to: 10