采用自行设计的介质阻挡放电反应器, 以氩气和离子液体为放电介质, 实现大气压下稳定的气(等离子体)-液(离子液体)等离子体放电, 并运用光谱法在线诊断氩等离子体光谱。考察了不同咪唑基离子液体以及放电参数对大气压氩气介质阻挡放电光谱的影响。结果表明, 离子液体的引入降低了氩气放电光谱的强度, 谱峰强度与离子液体阳离子咪唑环上的碳链长度有关, 且随碳链长度增加, 谱峰强度降低; 同时阴离子结构对称性低的离子液体, 谱峰强度较低。加入离子液体后氩谱随放电电压及放电频率变化均呈现峰值变化。

The spatially and temporally stable gas-liquid interfacial plasma was obtained with argon and ionic liquids as discharge medium at atmospheric pressure. The argon plasma emission spectra were measured via the diagnosis technique of optical emission spectroscopy (OES). The influence of different kinds of ionic liquids and discharge parameters on the emission spectra of argon dielectric barrier discharge was researched in the present paper. The results show that the intensity of argon discharge spectra reduced due to the introduction of ionic liquids. The intensity of argon spectra decreased with lengthening carbon chains, and increased with the higher anionic structural symmetry of ionic liquids. When ionic liquids were introduced into the DBD system, the intensity of argon spectrum has maximum value with discharge voltage and discharge frequency changed.