| 학회 |
한국화학공학회 |
| 학술대회 |
2009년 봄 (04/23 ~ 04/24, 광주 김대중컨벤션센터) |
| 권호 |
15권 1호, p.657 |
| 발표분야 |
환경 |
| 제목 |
Synthesis of polypyrrole doped nitrate sensor for groundwater monitoring |
| 초록 |
In this study, Pyrrole doped nitrate sensor was prepared by electrochemical polymerization for in situ monitoring of nitrate.Pyrrole is polymerized on the substrate at constant current/potential condition. Indium tin oxide(ITO) and graphite electrode are used as substrates. From the cyclic voltamogram and chronogram, it is discovered that polymerization was occurred at 0.6~0.7 V. Between ITO and graphite, graphite electrode exhibits better durability and stability than the other. Thickness of pyrrole film affects the selectivity and detection range of sensor. Therefore, various potential and polymerization time were applied to sensor preparation to control the thickness of Polypyrrole film. Polymerized nitrate selective electrodes have rapid response (several seconds), exhibiting Nenstian behavior (slope= 42.53 mV per log cycle of NO3- at 25 oC). Linear response to nitrate concentration was observed from 3 to 105 mg/L of NO3-. Detection limit of prepared sensor is approximately 2 mg/L according to extrapolation methods. Preapared sensor was not affected by the concentration of other ion such as SO42-, PO43-and CO32-.Also it can be usefulat pH from 2.5 to 11.5. |
| 저자 |
홍혜진1, Wasif Farooq1, 이성재2, 양지원1
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| 소속 |
1KAIST, 2한국에너지기술(연) |
| 키워드 |
nitrate sensor; polypyrrole; groundwater; monitoring
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| E-Mail |
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| 원문파일 |
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