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13 December 2024 Theoretical and experimental study on the effect of N-doping concentration on TiO2 thin film photocatalytic performance
Yuying Mei, Yonglei Jia, Yao Pan, Yunfeng Tao, Yiming Luo, Kaiyong Yang, Bing Lei
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Proceedings Volume 13497, AOPC 2024: Optical Design and Manufacturing; 134970C (2024) https://doi.org/10.1117/12.3047721
Event: Applied Optics and Photonics China 2024 (AOPC2024), 2024, Beijing, China
Abstract
This study investigates the impact of nitrogen doping concentration on the photocatalytic activity of TiO2 catalysts. TiO2 thin film samples with varying nitrogen doping levels were synthesized using radio frequency magnetron sputtering on fused quartz substrates. Comprehensive characterization techniques were utilized to analyze the crystal structure, morphology, nitrogen doping status, light absorption properties, and photocatalytic performance of these samples. Additionally, first-principles simulations were performed to examine the crystal structure, electronic structure, and density of states of TiO2 across different nitrogen doping concentrations, aiming to clarify the underlying mechanisms affecting photocatalytic activity. The combined theoretical and experimental results reveal that nitrogen doping causes structural distortions in TiO2, transitioning it from an indirect to a direct bandgap semiconductor and reducing the bandgap width. This alteration enhances the photocatalytic efficiency of TiO2 thin films. Notably, the sample with 1.76% nitrogen doping demonstrated a photocatalytic efficiency of 58.95%, which is 2.08 times greater than that of undoped TiO2 thin films.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Yuying Mei, Yonglei Jia, Yao Pan, Yunfeng Tao, Yiming Luo, Kaiyong Yang, and Bing Lei "Theoretical and experimental study on the effect of N-doping concentration on TiO2 thin film photocatalytic performance", Proc. SPIE 13497, AOPC 2024: Optical Design and Manufacturing, 134970C (13 December 2024); https://doi.org/10.1117/12.3047721
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KEYWORDS
Doping
Thin films
Titanium dioxide
Nitrogen
Crystals
Chemical species
Light absorption
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