A plasma-assisted cataluminescence sensor for ethyne detection

Abstract

The detection of ethyne is crucial not only in environmental monitoring but also in process controlling and mechanism studies in industrial fields. Here, a new sensor based on the plasma-assisted cataluminescence (PA-CTL) has been fabricated for the detection of ethyne. Based on the assistance of low-temperature plasma (LTP) generated by air, which can enhance the catalytic ability of catalysts and the reactivity of the analytes, we observed significant cataluminescence (CTL) emissions on the surface of nanomaterials of Zn/SiO₂. CTL emission has demonstrated to be affected by the type of discharge gases or the metal ions doping on the catalysts of SiO₂. By the optimizations on the working temperature and gas flow rate of the air, a PA-CTL based sensor was constructed for the detection of ethyne. As demonstrated, this sensor exhibited a linearity of 11–1160 ng/mL (10–1000 ppm) with a limit of detection (LOD) of 5 ng/mL (5 ppm), and also showed good selectivity as well as good stability. This sensor is simple, low-cost, and could give stable responses for actual applications, which will expand the applications of CTL and show potentials in industrial substances detections.

Graphical Abstract

A plasma-assisted cataluminescence gas sensor for ethyne detection

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