Oxygen-vacancy-rich La2O2CO3 nanomaterials: A cataluminescence sensor with high selectivity for propionaldehyde detection.
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| Title: | Oxygen-vacancy-rich La2O2CO3 nanomaterials: A cataluminescence sensor with high selectivity for propionaldehyde detection. |
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| Authors: | Jiang, Li1,2 (AUTHOR), Wan, Chengcheng2 (AUTHOR), He, Jiumei2 (AUTHOR), Zhang, Qianchun1,2 (AUTHOR) qianchunzhang@qq.com, Lu, Shaorong1 (AUTHOR) lushaor@163.com |
| Source: | Applied Surface Science. Jul2026, Vol. 733, pN.PAG-N.PAG. 1p. |
| Subjects: | Oxygen vacancy, Propionaldehyde, Volatile organic compounds, Nanostructured materials, Density functional theory, Heat treatment, Gas detectors |
| Abstract: | [Display omitted] • Adjusting oxygen vacancies was first applied to enhance La 2 O 2 CO 3 nanoparticle performance in catalytic luminescence sensing. • A highly sensitive propionaldehyde sensor was developed using oxygen-vacancy-rich La 2 O 2 CO 3 nanoparticles. • The cataluminescence sensing mechanism of propionaldehyde on La 2 O 2 CO 3 -R was investigated using density functional theory. In gas sensor applications, the strategic construction and precise regulation of oxygen vacancies are crucial. This study synthesized La 2 O 2 CO 3 nanomaterials with tunable oxygen vacancy concentrations, denoted as La 2 O 2 CO 3 -R (via thermal reduction) and La 2 O 2 CO 3 -O (via thermal oxidation). Structural and morphological analyses revealed that La 2 O 2 CO 3 -R possesses a higher concentration of oxygen vacancies and a larger specific surface area than La 2 O 2 CO 3 -O. Gas sensing performance demonstrated that La 2 O 2 CO 3 -R exhibits significantly enhanced cataluminescence (CTL) intensity toward 19 volatile organic compounds (VOCs), with propionaldehyde (propanal) eliciting the strongest response. The CTL sensor based on La 2 O 2 CO 3 -R showed a broad linear detection range from 1.92 to 1928 ppm (R2 = 0.998) and a low detection limit of 0.617 ppm (S/N = 3) for propionaldehyde. Notably, this high sensitivity was maintained even in the presence of multiple interfering VOCs. The sensor's excellent anti-interference capability was validated across various VOC backgrounds, achieving recovery rates of 82.2%–102% with relative standard deviations (RSD, n = 5) between 5.8% and 8.2%, confirming its high reliability and reproducibility. Furthermore, density functional theory (DFT) simulations provided molecular-level insights into the adsorption behavior, elucidating the underlying CTL reaction mechanism. This work establishes a robust CTL sensing strategy utilizing oxygen-vacancy-rich La 2 O 2 CO 3 nanoparticles for the selective detection of propionaldehyde. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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