University of Oulu

HAMDI, DALANDA; MANSOURI, LOBNA; SRIVASTAVA, VARSHA; SILLANPAA, MIKA; and BOUSSELMI, LATIFA (2022) "Cerium and europium doped TiO2 thin films deposited by a sol-gel dip-coating process: characterization and photocatalytic activity toward dye degradation," Turkish Journal of Chemistry: Vol. 46: No. 2, Article 12.

Cerium and europium doped TiO₂ thin films deposited by a sol-gel dip-coating process : characterization and photocatalytic activity toward dye degradation

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Author: Hamdi, Dalanda1,2; Mansouri, Lobna1; Srivastava, Varsha3;
Organizations: 1Laboratory of Wastewater and Environment, Center for Water Research and Technologies of BorjCedria Tunisia (CERTE), Technopark Borj Cedria, Soliman, Tunisia
2University of Gabes, National school of engineers of Gabes, Gabes, Tunisia
3Research Unit of Sustainable Chemistry, Faculty of Technology, University of Oulu, Oulu, Finland
4Environmental Engineering and Management Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam
5Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 3.5 MB)
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Language: English
Published: Scientific and Technological Research Council of Turkey, 2022
Publish Date: 2023-07-10


Cerium (Ce) and europium (Eu)-doped TiO₂ thin films were obtained by sol-gel dip-coating technique. SEM micrographs showed that the surfaces are covered by agglomerated particles due to the repeating coating process. XRD patterns showed the presence of TiO₂ anatase phase. Raman spectra revealed that the peaks recorded at 146 cm⁻¹(Eg) and 397 cm⁻¹(B1g) were related to the anatase phase. EIS measurements proved that Ce-TiO2 (1wt%) and Eu-TiO₂ (0.1wt%) photocatalysts possessed a lower electron transfer resistance than pure TiO₂, which can lead to effective separation of electron/ hole pairs during the photoreactions. The photoactivity of Ce and Eu-doped TiO₂ was investigated by the degradation of amido black10B dye (AB) under UV excitation and varying the initial pH and concentrations. It was found that Eu-TiO₂ (0.1wt%) exhibited higher photocatalytic activity, reaching a first-order reaction rate of kapp(0.036min-1), t1/2 was around 12 min and AB removal was 98.94%, under optimal pH of 3.5 and AB concentration of 10ppm compared to (t1/2 = 45 min, t1/2=30 min), (kapp = 0.022 min-1, kapp = 0.026min-1) and AB removal (94.78%, 96.44%), respectively for pure TiO₂ and Ce-TiO₂ (1wt%). Further increase in Eu/Ce amount up to optimal concentration (1wt% Ce and 0.1wt% Eu) led to a decrease in the AB removal. The mineralization of AB using Eu-TiO₂ photocatalyst was confirmed by HPLC analysis.

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Series: Turkish journal of chemistry
ISSN: 1300-0527
ISSN-E: 1303-6130
ISSN-L: 1300-0527
Volume: 46
Issue: 2
Pages: 415 - 433
DOI: 10.55730/1300-0527.3317
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
Funding: This research was financially supported by the Tunisian Ministry of Higher Education and Scientific Research under an objective contract.
Copyright information: © TÜBİTAK 2022. This work is licensed under a Creative Commons Attribution 4.0 International License.