Study of Ion Formation and Evolution in Ambient Corona Discharge

Study of Ion Formation and Evolution in Ambient Corona Discharge
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环境电晕放电中离子形成和演化的研究

DOI:
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发表时间:
2011
期刊:
--
影响因子:
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通讯作者:
M. Takayama
M. Takayama
中科院分区:
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文献类型:
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作者:
K. Sekimoto;M. Takayama

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环境电晕放电在环境、分析和气溶胶科学等广泛的研究和工业领域中被用作电离器,甚至可能在商业电器中使用。在电晕放电中,通过离子-分子反应,通过离子演化产生的终端离子可以方便而有效地为环境空气中的电离提供电荷。尽管在电晕放电的应用方面取得了实质性的进展,但涉及终端离子形成和演化的基本过程尚未被很好地理解。有报道称,负离子的演化与正离子的演化相比是相当复杂的,而且很难调节特定负离子物种的可重复形成。我们最近建立了一个包含特殊电晕针的大气压电晕放电系统,它成功地导致了来自环境空气的各种正负离子的规则和可重复产生。该系统与质谱仪相结合,使研究终端离子形成与放电条件之间的关系成为可能。本文将描述H3O、Ho−、NOx和COX等终端离子的形成和演化机制,它们依赖于针尖上的电场强度和由此产生的在针尖上加速的电子的动能。
Ambient corona discharge has been used as an ionizer in a wide range of research and industrial fi elds such as environmental, analytical and aerosol sciences, and possibly even commercial electric appliances. Terminal ions produced via ion evolutions through successive ion-molecule reactions in corona discharge can readily and effi ciently supply the charge for ionization in ambient air. Despite substantial progress in the application of corona discharge, the elementary processes involved in terminal ion formation and evolution are not yet well understood. It has been reported that negative ion evolution is rather complex compared to that of positive ions, and that it is diffi cult to regulate the reproducible formation of specifi c negative ion species. We have recently established an atmospheric pressure corona discharge system containing a specifi c corona needle that successfully leads to regular and reproducible generation of various positive and negative ions originating from ambient air. The system coupled with mass spectrometers made it possible to study the relationship between terminal ion formation and discharge conditions. In this paper, the formation and evolution mechanism of terminal ions such as H3O, HO−, NOx and COx depending on the electric fi eld strength on the needle tip and the resulting kinetic energy of electrons accelerated at the tip will be described.
DOI: --
发表时间: 2010
期刊:
影响因子: --
作者:
K.Sekimoto;M.Takayama
通讯作者: M.Takayama
DOI: --
发表时间: 2011
期刊:
影响因子: --
作者:
K.Sekimoto;M.Takayama
通讯作者: M.Takayama
DOI: --
发表时间: 2011
期刊:
影响因子: --
作者:
K.Sekimoto;M.Takayama
通讯作者: M.Takayama