Issue 38, 2024

Improving the broadband photocatalytic performance of TiO2 through a highly efficient optical converter

Abstract

Developing efficient photocatalysts that respond to near-infrared (NIR) light holds significant scientific importance for improving the utilization of solar energy. In this study, the photocatalyst β-NaLuF4:Yb3+/Tm3+@TiO2 that simultaneously responds to both ultraviolet (UV) and NIR light is successfully synthesized. Instead of the conventional use of β-NaYF4:Yb3+/Tm3+, β-NaLuF4:Yb3+/Tm3+ upconversion (UC) nanoparticles (NPs) are employed as the NIR-UV light converter to achieve stronger UV UC luminescence. The data indicate that the photocatalytic degradation efficiency and rate of β-NaLuF4:Yb3+/Tm3+@TiO2 synthesized in this work are superior to those of NIR-driven photocatalysts based on β-NaYF4:Yb3+/Tm3+ under both NIR and sunlight irradiation. Further analysis of the UC emission spectra and the decay curves of the samples reveals an effective fluorescence resonance energy transfer (FRET) process between β-NaLuF4:Yb3+/Tm3+ and TiO2 after the combination, which makes the NIR-driven photocatalytic reactions happen. All results confirm that the present β-NaLuF4:Yb3+/Tm3+@TiO2 is an exceptionally efficient photocatalyst, owing to its responsiveness to both UV and NIR light.

Graphical abstract: Improving the broadband photocatalytic performance of TiO2 through a highly efficient optical converter

Supplementary files

Article information

Article type
Paper
Submitted
27 جوٗن 2024
Accepted
13 اگست 2024
First published
13 اگست 2024

J. Mater. Chem. C, 2024,12, 15682-15690

Improving the broadband photocatalytic performance of TiO2 through a highly efficient optical converter

G. Xiang, Y. Yi, Z. Liu, Y. Li, Z. Yang, Y. Wang, S. Jiang, X. Tang, X. Zhou, L. Li, X. Wang and J. Zhang, J. Mater. Chem. C, 2024, 12, 15682 DOI: 10.1039/D4TC02695K

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