脉冲放电等离子体-流光光催化协同作用机理的化学分析
首发时间:2011-01-07
摘要:脉冲放电等离子体和TiO2光催氧化高级氧化技术是两种高效的废水处理技术。为了提高废水中有机物的降解效率,本研究建立了脉冲放电等离子体-流光光催化协同体系,并从化学分析的角度分析了脉冲放电等离子体与TiO2光催化剂的协同作用机理。研究中考察了不同载气种类和不同自由基捕收剂浓度添加条件下,单独放电体系和协同体系中有机物的降解效率和相同条件下体系中生成的H2O2浓度的变化。结果证明:脉冲放电等离子体-流光光催化协同体系中有机物的降解效率更高,并且可以产生更多的H2O2,说明脉冲放电过程中产生的流光可以诱导其中的TiO2的光催化活性,产生更多的oOH氧化降解有机物。
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Research on synergistic mechanism of pulsed discharge plasma-streamer photocatalysis through chemical analysis
Abstract:Pulsed discharge plasma and TiO2 photocatalysis are two kinds of effective wastewater treatment technologies. In order to enhance degradation efficiency of organic compounds in wastewater, a snergistic system of pulsed discharge plasma and TiO2 photocatalysis is set up in the research. The synergistic mechanism of plasma and TiO2 photocatalyst is studied through chemical analysis. In the paper, phenol degradation and H2O2 concentrations are reviewed under different conditions of gas bubbling varieties and scavenger additions. The obtained results show that there are more phenol degradation and H2O2 formation in the system of pulsed discharge plasma-streamer photocatalysis than those in the plasma alone system. Such results prove the streamer formed during pulsed discharge process can induce the TiO2 photocatalysis in the reaction system and more OH would be produced in the synergistic system to oxdize organic compounds.
Keywords: pulsed discharge plasma streamer photocatalysis synergistic mechanism H2O2
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