Shi Zhaoxia, Luo Zhen, Liu Yilu, Liu Zi, Chen Xinyue, Zhang Yintang, Zhou Yanli, Xu Maotian
Henan Key Laboratory of Biomolecular Recognition and Sensing, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu, 476000, China.
Department of Surveying and Planning, School of Chemistry, Shangqiu Normal University, Shangqiu, 476000, China.
Mikrochim Acta. 2025 Jul 29;192(8):534. doi: 10.1007/s00604-025-07389-2.
Four different morphologies of TiO were successfully synthesized and the morphological dependence of the catalytic performance was investigated for monitoring of n-hexane. TiO 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 TiO 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 TiO 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.
成功合成了四种不同形貌的二氧化钛（TiO），并研究了其形貌对正己烷监测催化性能的影响。二氧化钛纳米管由于具有高比表面积和有序排列，在正己烷的催化发光（CTL）反应中表现出最佳的催化性能。为了进一步提高催化活性，合成了二氧化钛纳米管@Mg-MOF-74复合材料，用于构建快速检测正己烷的CTL传感器；Mg-MOF-74的引入提高了吸附容量和选择性。基于二氧化钛纳米管@Mg-MOF-74构建了用于快速检测正己烷的CTL传感器，在最佳条件下，CTL信号强度与正己烷浓度在0.20 - 200.0 mg/L范围内呈良好的线性关系。检测限（LOD，S/N = 3）为0.08 mg/L。使用同一传感器连续11次测量和7个不同传感器测量的相对标准偏差（RSD）值分别为2.8%（n = 11）和3.5%（n = 7），表明具有良好的重复性和再现性。最后，该传感器用于检测不同工作场所空气样品中的正己烷，回收率在90.2%至106.4%之间，显示出良好的准确性。因此，所开发的CTL传感器可用于快速检测空气中的正己烷，避免因过量吸入对健康造成损害。
