The detection and discrimination of benzene, toluene, ethylbenzene and xylene (BTEX) are tricky and challenging issues no matter in environmental monitoring or process controlling in industrial fields. Herein, an ozone-inducted ratiometric cataluminescence strategy for fast quantifying and recognizing BTEX was developed. With ozone as oxidant and rare earth ions Eu³⁺, Tb³⁺ co-doped MgO nanocatalyst as sensing material, BTEX were found to produce strong cataluminescence (CTL) emission. And each analyte has unique ratio of the intensities under the characterization wavelength of Eu³⁺ and Tb³⁺ in a wide range of concentrations, which can be assumed as the qualitative parameter for BTEX recognition. On that basis, BTEX were supposed to be identified successfully with discrepant ratios for I_Eu/I_Tb of 0.73 ± 0.03, 1.34 ± 0.03, 4.47 ± 0.18, 2.39 ± 0.11, and measured simultaneously with detection limit of 0.13, 0.21, 0.092, 0.053 μg ml⁻¹, respectively. Besides, the prepared catalysts were characterized and the possible CTL sensing recognition mechanism for BTEX were discussed in detail. The proposed methodology provides a new insight for monitoring and identifying low active compounds.

无论在工业领域的环境监测还是过程控制中，苯，甲苯，乙苯和二甲苯（BTEX）的检测和鉴别都是棘手且具有挑战性的问题。在此，开发了一种臭氧诱导比例催化发光策略，用于快速定量和识别BTEX。以臭氧为氧化剂，稀土离子Eu ³⁺，Tb ³⁺共掺杂MgO纳米催化剂为传感材料，发现BTEX产生强催化发光（CTL）发射。在Eu ³⁺和Tb ³⁺的表征波长下，每种分析物具有独特的强度比在很宽的浓度范围内都可以作为BTEX识别的定性参数。在此基础上，假设可以成功鉴定出BTEX，I _Eu / I _Tb的差异比率分别为0.73±0.03、1.34±0.03、4.47±0.18、2.39±0.11，并同时以0.13、0.21、0.092，分别为0.053μgml ^-1。此外，对制备的催化剂进行了表征，并详细讨论了可能用于BTEX的CTL传感识别机理。所提出的方法为监测和鉴定低活性化合物提供了新的见解。