Melison Fabio, Cocola Lorenzo, Poletto Luca
National Research Council of Italy, Institute for Photonics and Nanotechnologies, CNR-IFN, Via Trasea 7, 35131 Padova, Italy.
Sensors (Basel). 2025 Jul 5;25(13):4190. doi: 10.3390/s25134190.
The current solicitude in hydrogen production and its utilization as a greenhouse-neutral energy vector pushed deep interest in developing new and reliable systems intended for its detection. Most sensors available on the market offer reliable performance; however, their limitations, such as restricted dynamic range, hysteresis, reliance on consumables, transducer-sample interaction, and sample dispersion into the environment, are not easily overcome. In this paper, a non-dispersive Raman effect-based system is presented and compared with its dispersive alternative. This approach intrinsically guarantees no sample dispersion or preparation, as no direct contact is required between the sample and the transducer. Moreover, the technique does not suffer from hysteresis and recovering time issues. The results, evaluated in terms of sample pressures and camera integration time, demonstrate promising signal-to-noise ratio (SNR) and limit of detection (LOD) values, indicating strong potential for direct field application.
当前对制氢及其作为温室气体中和能源载体的利用的关注,引发了人们对开发用于氢气检测的新型可靠系统的浓厚兴趣。市场上现有的大多数传感器都具有可靠的性能;然而,它们的局限性,如动态范围受限、滞后现象、依赖消耗品、传感器与样品的相互作用以及样品扩散到环境中,并不容易克服。本文提出了一种基于非色散拉曼效应的系统,并将其与色散型系统进行了比较。这种方法本质上保证了无样品扩散或样品制备,因为样品与传感器之间无需直接接触。此外,该技术不存在滞后和恢复时间问题。根据样品压力和相机积分时间评估的结果表明,该系统具有良好的信噪比(SNR)和检测限(LOD)值,显示出直接现场应用的强大潜力。