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《Spectroscopy and Spectral Analysis》 2007-12
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Spectral Diagnosis of Hydroxyl Radical in Multiphase Pulsed Discharge System

WANG Hui-juan1,3,LI Jie2,QUAN Xie1,WU Yan2,LI Guo-feng2 1.School of Environmental and Biological Science and Technology,Dalian University of Technology,Dalian 116024,China 2.Institute of Electrostatics and Special Power,Dalian University of Technology,Dalian 116024,China 3.College of Life Science and Technology,Xiaogan University,Xiaogan 432000,China  
A gas-liquid hybrid pulsed discharge system with a multi-needle-to-plate electrode geometry was used in the present study.A multiphase(gas-liquid-solid) pulsed discharge system was then formed by adding glasses beads immobilized with TiO2 photocatalyst into the discharge system.In the present paper,ultraviolet light produced during the pulsed discharge process was used as the lamp-house to induce the photocatalytic activity of the TiO2 photocatalyst.The synergistic effect of pulsed discharge and TiO2 photocatalysis was reviewed by the spectral diagnosis of hydroxyl radical(·OH) in the pulsed discharge system.The obtained results showed that the emission spectrum of ·OH could be observed at 306 nm(A2Σ+→X2Π),309 nm(A2Σ+(ν′=0)→X2Π(ν″=0)) and 313 nm(A2Σ+(ν′=1)→X2Π(ν″=1) transition).The relative emission intensity of ·OH at 313 nm in the discharge system was the strongest among the three characteristic spectra.The relative emission intensity of ·OH at 313 nm was stronger by adding TiO2 photocatalyst into the pulsed discharge system than that in the sole pulsed discharge system.In the case of experiments that changing the gas bubbling varieties and initial solution pH values,the results revealed that the relative emission intensity of ·OH at 313 nm in the synergistic system was stronger when Ar was used as bubbling gas compared with that when air and oxygen were bubbled into the reaction system.Furthermore,the acidic solution system was favorable for producing more ·OH,and therefore the corresponding emission intensity of ·OH at 313 nm was stronger than that in the neutral and basic solution.
【Fund】: 国家自然科学基金项目(203770066);; 教育部博士点基金项目(2005141002)资助
【CateGory Index】: X703
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Chinese Journal Full-text Database 1 Hits
1 WANG Hui-juan(Environment College of Jiangsu University,Zhenjiang,Jiangsu 212013);Wastewater Treatment by Pulsed Discharge Plasma and Its Research Progress[J];Journal of Anhui Agricultural Sciences;2009-22
【Citations】
Chinese Journal Full-text Database 2 Hits
1 SUN Ming1, WU Yan1, ZHANG Jia-liang2, LI Jie1, WANG Ning-hui1, WU Jiang1, SHANG Ke-feng1 1. Institute of Electrostatics and Specific Power, Dalian University of Technology, Dalian 116024, China 2. The State Key Laboratory for Material Modification, Dalian University of Technology, Dalian 116024, China;Emission Spectra of Hydroxyl Radical Generated in Air Corona Discharge[J];Spectroscopy and Spectral Analysis;2005-01
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【Co-citations】
Chinese Journal Full-text Database 8 Hits
1 DONG Bing-yan1, ZHANG Da-chao1, WU Yan21. School of Resources & Environmental Engineering, Jiangxi University of Science & Technology, Ganzhou 341000, China2. Research Institute of Electrostatic & Special Power, Dalian University of Technology, Dalian 116023, China;Measurements of Density Distribution of High Energy Electrons by Emission Spectroscopy in Pulsed Discharge Reactor[J];Spectroscopy and Spectral Analysis;2008-01
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