研究目的
Investigating the spatially resolved concentration of ozone in the near afterglow of a novel type of atmospheric multi-hollow barrier discharge using photofragmentation laser-induced fluorescence.
研究成果
The method presented is promising for monitoring ozone concentration with high spatial and temporal resolution, enabling the observation of inhomogeneities in the O3 distribution in the reactor and leading to a better understanding of ozonizer discharge operation.
研究不足
The principal limitation is the interference of vibrationally excited O2 molecules generated in the discharge, where the minimal time necessary for vibrational relaxation in dry air at atmospheric pressure is estimated to be about 200 μs.
1：Experimental Design and Method Selection:
The method involves photodissociation of O3 to O(3P) and O2(X3Σg?) with considerable vibrational excitation, followed by predissociation laser-induced fluorescence of the molecular fragment.
2：Sample Selection and Data Sources:
The study uses a micro-hollow surface dielectric barrier discharge (MSDBD) operating in dry air.
3：List of Experimental Equipment and Materials:
Includes a laser system with specific parameters, an Andor iStar ICCD camera, a Melles Griot long-pass filter, an Andor Shamrock SR750 monochromator, and a Hamamatsu R928P photomultiplier tube.
4：Experimental Procedures and Operational Workflow:
The discharge was powered by a sinusoidal AC signal, and the fluorescence signal was captured and analyzed.
5：Data Analysis Methods:
The fluorescence signal was calibrated by infrared absorption, and the data was analyzed to determine ozone concentration.
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