Physicochemical process of non-thermal plasma at gas-liquid interface and synergistic effect of plasma with catalyst

被引:10
作者
Chandana, L. [1 ]
Ray, Debjyoti [2 ]
Subrahmanyam, Ch [3 ]
机构
[1] Vallurupalli Nageswara Rao Vignana Jyothi Inst En, Dept Humanities & Sci, Hyderabad 500090, Telangana, India
[2] Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China
[3] Indian Inst Technol, Dept Chem, Kandi 502285, Telangana, India
关键词
Plasma; ROS; RNS; Fenton process; Catalyst; GLIDING ARC-DISCHARGE; METHYLENE-BLUE; WATER; DEGRADATION; MINERALIZATION; ABATEMENT; BACTERIA;
D O I
10.1016/j.cap.2022.01.006
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
An atmospheric-pressure plasma jet (APPJ) was directly irradiated at a gas-liquid interface under ambient conditions. The reactive oxygen species (ROS) like hydroxyl radicals (center dot OH), hydrogen peroxide (H2O2) and ozone (O-3) and also reactive nitrogen species (RNS) such as nitrogen oxides (NOx) and nitric acid (HNO3) formed during the plasma discharge were quantified under various experimental parameters. In a chemical dosimetry method, terephthalic acid (TA) was employed for the quantification of center dot OH and titanium sulfate was used to quantify the H2O2. Quantitative determination of NO3- was carried out by using Ion chromatography (IC). The changes in the solution pH were studied during the plasma treatment. Strong acidification along with the production of dominant reactive nitrogen species and ozone formation were observed with air. The effect of various gases, gas flow rate, various applied voltage and catalyst were studied to optimize the experimental conditions for the best performance. The influence of catalyst Fe2+ salt, TiO2 on the formation of reactive species were studied. The efficiency of the plasma device for the degradation of crystal violet (CV) was also investigated with TiO2 and Fe2+ salt.
引用
收藏
页码:16 / 26
页数:11
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