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Ozone-assisted cataluminescence sensor based on morphology-controlled TiO2@Mg-MOF-74 composite for rapid detection of N-hexane.

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Bibliographic Details
Title:	Ozone-assisted cataluminescence sensor based on morphology-controlled TiO2@Mg-MOF-74 composite for rapid detection of N-hexane.
Authors:	Shi, Zhaoxia¹ (AUTHOR) shizhaoxia@sqnu.edu.cn, Luo, Zhen² (AUTHOR), Liu, Yilu¹ (AUTHOR), Liu, Zi¹ (AUTHOR), Chen, Xinyue¹ (AUTHOR), Zhang, Yintang^1,3 (AUTHOR), Zhou, Yanli¹ (AUTHOR), Xu, Maotian¹ (AUTHOR)
Source:	Microchimica Acta. Aug2025, Vol. 192 Issue 8, p1-12. 12p.
Subjects:	Hexane, Catalytic activity, Air quality monitoring, Composite materials, Detectors
Abstract:	Four different morphologies of TiO2 were successfully synthesized and the morphological dependence of the catalytic performance was investigated for monitoring of n-hexane. TiO2 nanotubes showed the best catalytic performance for the cataluminescence (CTL) reaction of n-hexane because of their high specific surface area and ordered arrangement. To further enhance catalytic activity, a TiO2 nanotube@Mg-MOF-74 composite was synthesized, which was used to construct a CTL sensor for rapid detection of n-hexane rapidly; the introduction of Mg-MOF-74 improved the adsorption capacity and selectivity. A CTL sensor was constructed based on TiO2 nanotube@Mg-MOF-74 for the rapid detection of n-hexane, Under the optimal conditions there was a good linear relationship between CTL signal intensity and the concentration of n-hexane in the range 0.20–200.0 mg/L. The detection limit (LOD, S/N = 3) was 0.08 mg/L. The RSD values for 11 consecutive measurements using the same sensor and 7 different sensors were 2.8% (n = 11) and 3.5% (n = 7), respectively, demonstrating good repeatability and reproducibility. Finally, the sensor was used to detect n-hexane in air samples from different workplaces, with recoveries ranging from 90.2 to 106.4%, showing good accuracy. Thus, the developed CTL sensor could be used for rapid detection of n-hexane in air, avoiding damage to health caused by excessive inhalation. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	Four different morphologies of TiO2 were successfully synthesized and the morphological dependence of the catalytic performance was investigated for monitoring of n-hexane. TiO2 nanotubes showed the best catalytic performance for the cataluminescence (CTL) reaction of n-hexane because of their high specific surface area and ordered arrangement. To further enhance catalytic activity, a TiO2 nanotube@Mg-MOF-74 composite was synthesized, which was used to construct a CTL sensor for rapid detection of n-hexane rapidly; the introduction of Mg-MOF-74 improved the adsorption capacity and selectivity. A CTL sensor was constructed based on TiO2 nanotube@Mg-MOF-74 for the rapid detection of n-hexane, Under the optimal conditions there was a good linear relationship between CTL signal intensity and the concentration of n-hexane in the range 0.20–200.0 mg/L. The detection limit (LOD, S/N = 3) was 0.08 mg/L. The RSD values for 11 consecutive measurements using the same sensor and 7 different sensors were 2.8% (n = 11) and 3.5% (n = 7), respectively, demonstrating good repeatability and reproducibility. Finally, the sensor was used to detect n-hexane in air samples from different workplaces, with recoveries ranging from 90.2 to 106.4%, showing good accuracy. Thus, the developed CTL sensor could be used for rapid detection of n-hexane in air, avoiding damage to health caused by excessive inhalation. [ABSTRACT FROM AUTHOR]
ISSN:	00263672
DOI:	10.1007/s00604-025-07389-2