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Journal of Sol-Gel Science and Technology

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14-08-2023 | Original Paper

Enhanced photocatalytic degradation of organic dyes using Ce–doped TiO₂ thin films

Authors: Thi Le Na Vo, Thi Thuy Dao, Anh Tuan Duong, Van Hao Bui, Viet Huong Nguyen, Dinh Lam Nguyen, Duc Cuong Nguyen, Tuan Hong Nguyen, Huu Tuan Nguyen

Published in: Journal of Sol-Gel Science and Technology | Issue 2/2023

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Abstract

We fabricated and investigated the Ce–doped TiO₂ (Ce–TiO₂, 1.0 wt%) photocatalysts thin film using sol–gel and spin coating methods, which can be used to effectively treat toxic organic substances from aqueous environments. The thin films were characterized by X–ray diffraction, scanning electron microscopy, energy–dispersive X–ray spectroscopy, Raman spectroscopy, photoluminescent spectroscopy, and ultraviolet–visible spectrophotometer. In terms of quantitative analysis, the Ce–TiO₂ thin film exhibited a lower band gap of 3.21 eV compared to the undoped TiO₂ film with a band gap of 3.38 eV. These results suggest an improved photocatalytic efficiency, which was further confirmed by experimental findings related to wastewater treatment. The photocatalytic behavior under UV irradiation was studied for the degradation of methylene blue, rhodamine B, methyl violet, and tetracycline (TC). In comparison to the pure TiO₂ thin film, the Ce–TiO₂ thin film photocatalyst showed a significantly larger photocatalytic activity. The largest removal efficiency of Ce–TiO₂ photocatalytic thin film was observed on the degradation of TC with an efficiency of 86.42% after 120 min of exposure, suggesting potential applications in treating water pollution caused by hazardous chemicals or other pollutants.

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Title: Enhanced photocatalytic degradation of organic dyes using Ce–doped TiO2 thin films
Authors: Thi Le Na Vo
Thi Thuy Dao
Anh Tuan Duong
Van Hao Bui
Viet Huong Nguyen
Dinh Lam Nguyen
Duc Cuong Nguyen
Tuan Hong Nguyen
Huu Tuan Nguyen
Publication date: 14-08-2023
Publisher: Springer US
Published in: Journal of Sol-Gel Science and Technology / Issue 2/2023
Print ISSN: 0928-0707
Electronic ISSN: 1573-4846
DOI: https://doi.org/10.1007/s10971-023-06203-w

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