| Comparative study of oxidation ability between boron-doped diamond （BDD） and lead oxide （PbO_2） electrodes |
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| 作者姓名： | Jun-jun Wei Xiu-ping Zhu Fan-xiu L Jin-ren Ni |
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| 作者单位： | [1]Department of Environmental Engineering, Peking University, Beijing 100871, China [2]Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| 摘 要： |
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| 关 键 词： | PbO2电极 氧化能力 BDD 掺硼金刚石 羟基自由基 金刚石薄膜 电化学氧化 表面生成 |
Comparative study of oxidation ability between boron-doped diamond (BDD)and lead oxide(PbO2)electrodes |
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| Jun-jun Wei,Xiu-ping Zhu,Fan-xiu L,Jin-ren Ni.Comparative study of oxidation ability between boron-doped diamond (BDD)and lead oxide(PbO2)electrodes[J].Journal of University of Science and Technology Beijing,2011,18(5):589-593. |
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| Authors: | Jun-jun Wei Xiu-ping Zhu Fan-xiu Lii Jin-ren Ni |
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| Affiliation: | 1. Department ofEnvironmental Engineering, Peking University, Beijing 100871, China
2. Department of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | The electrochemical oxidation capabilities of two high-performance electrodes,the boron-doped diamond film on Ti(Ti/BDD)and the lead oxide film on Ti(Ti/PbO2),were discussed.Hydroxyl radicals(·HO)generated on the electrode surface were detected by using p-nitrosodimethylaniline(RNO)as the trapping reagent.Electrochemical oxidation measurements,including the chemical oxygen demand (COD)removal and the current efficiency(CE),were carried out via the degradation ofp-nitrophenol(PNP)under the galvanostatic condition.The results indicate that an indirect reaction,which is attributed to free hydroxyl radicals with high activation,conducts on the Ti/BDD electrode,while the absorbed hydroxyl radicals generated at the Ti/PbO2 surface results in low degradation efficiency.Due to quick mineralization which combusts PNP to CO2 and H2O absolutely by the active hydroxyl radical directly,the CE obtained on the Ti/BDD electrode is much higher than that on the Ti/PbO2 electrode,notwithstanding the number of hydroxyl radicals produced on PbO2 is higher than that on the BDD surface. |
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| Keywords: | thin films diamond films lead oxide born doping hydroxyl radicals chemical oxygen demand(COD) oxidation |
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