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<p> Four different morphologies of TiO<sub>2</sub> were successfully synthesized and the morphological dependence of the catalytic performance was investigated&#xa0;for monitoring of <i>n</i>-hexane. TiO<sub>2</sub> nanotubes showed the best catalytic performance for the cataluminescence (CTL) reaction of <i>n</i>-hexane because of their high specific surface area and ordered arrangement. To further enhance catalytic activity, a TiO<sub>2</sub> nanotube@Mg-MOF-74 composite was synthesized, which was used to construct a CTL sensor for rapid detection of <i>n</i>-hexane rapidly; the introduction of Mg-MOF-74 improved the adsorption capacity and selectivity. A CTL sensor was constructed based on TiO<sub>2</sub> nanotube@Mg-MOF-74 for the rapid detection of <i>n</i>-hexane,&#xa0;Under the optimal conditions there was a good linear relationship between CTL signal intensity and the concentration of <i>n</i>-hexane in the&#xa0;range 0.20–200.0 mg/L. The&#xa0;detection limit (LOD, <i>S/N</i> = 3) was 0.08 mg/L. The RSD values for 11 consecutive measurements using the same sensor and 7 different sensors were 2.8% (<i>n</i> = 11) and 3.5% (<i>n</i> = 7),&#xa0;respectively, demonstrating good repeatability and reproducibility. Finally, the sensor was used to detect <i>n</i>-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 <i>n</i>-hexane in air, avoiding damage to health caused by excessive inhalation.</p> Graphical abstract <p></p>

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

  • 期刊论文

  • 发表日期：

    2025年7月29日

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  • Zhaoxia Shi,
  • Zhen Luo,
  • Yilu Liu,
  • Zi Liu,
  • Xinyue Chen,
  • Yintang Zhang,
  • Yanli Zhou,
  • Maotian Xu

摘要

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.

Graphical abstract