Assessment of surface and electrical properties of the TiO2@zeolite hybrid materials

Degradation of pollutants in aqueous medium is of high interest due to the impact on environment and human health, therefore, design and study of the physico-chemical properties of photocatalysts for water remediation are of major significance. Among properties of photocatalyst, those related to the...

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Bibliographic Details
Published in:Scientific reports 2023-03, Vol.13 (1), p.3650-3650, Article 3650
Main Authors: Supelano, G. I., Mesa, F., Vargas, C. A. Parra, Gómez, J. A. Mejía, Dussan, A.
Format: Article
Language:English
Subjects:
639/301/1023
639/301/119
639/301/299
639/638/439/890
Chemical properties
Electrical properties
Environmental impact
Fly ash
Humanities and Social Sciences
Impedance
multidisciplinary
Photoelectron spectroscopy
Physical characteristics
Physicochemical properties
Scanning electron microscopy
Science
Science (multidisciplinary)
Spectroscopy
Spectrum analysis
Titanium dioxide
Zeolites
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Summary:Degradation of pollutants in aqueous medium is of high interest due to the impact on environment and human health, therefore, design and study of the physico-chemical properties of photocatalysts for water remediation are of major significance. Among properties of photocatalyst, those related to the surface and electrical mechanism are crucial to the photocatalyst´s performance. Here we report the chemical and morphological characteristics of TiO 2 @zeolite photocatalyst by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) respectively, and a coherent electrical conduction mechanism was proposed based on data obtained from assisted laser impedance spectroscopy (ALIS), in which the zeolite was synthesized from recycled coal fly ash. The results obtained by SEM and XPS verified the presence of spherical particles of TiO 2 anatase with presence of Ti 3+ state. ALIS results showed that impedance of the entire system increases when the amount of TiO 2 increases and the samples with lower capacitive performance allowed a larger transfer of the charges between the solid–liquid interface. All results showed that higher photocatalytic performance of TiO 2 growth over hydroxysodalite with 8.7 wt% and 25 wt% of TiO 2 can be explained in terms of the morphology of TiO 2 and the interactions between substrate-TiO 2 mainly.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-023-30529-8