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전류검출형 NO<sub>2</sub>가스 센서의 제작과 특성평가
김귀열,Kim, Gwi-Yeol 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.9
The nitrogen oxides, NO and $NO_2$, abbreviated usually as NOx, emitted from combustion facilities such as power plants and automobiles are the typical air-pollutants causing acid rain and photochemical smog. In order to solve the NOx-related pollution problems effectively, we need efficient techniques to monitor NOx in the combustion exhausts and in environments. Development of solid-state electrochemical devices for detecting NOx is demonstrated based on various combination of solid electrolytes and auxiliary sensing materials. The object of this research is to develop various sensor performance for solid state amperometric sensor, and to test gas sensor performance manufactured. So we try to present a guidance for developing amperometric gas sensor. We concentrated on development of manufacturing process and performance test. Amperometric Nitrogen dioxide sensor was fabricated using NASICON and an $NaNO_2$ layer deposited on the counter electrode. The current response was almost linear with Nitrogen dioxide concentration in the range 1-350 ppb at $150^{\circ}C$.
( Perumal Silambarasan ),( G. Muthuraman ),문일식 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
In the present investigation, Ag and Ag-Ni or Ag-Co metal ions coated Nafioni324 membrane electrode divided cell was developed and compared in amperometric detection of air pollutants. Ag and Ag-Ni or Ag-Co were chemically coated on the Nafion324 membrane and used in filter press technique to make a cell with one side having 0.1 M KOH electrolyte and gas phase cathodic half-cell. Based on the cyclic voltammetry and linear sweep voltammetry analyses, the gas phase redox peak was fixed for detection of selected gas pollutants. Then sense a selected air pollutants by amperometric method at different suitable applied voltage. The current with different feed concentration were compared with in-situ FTIR gas analyzer concentration and derived calibration plot.
Biological and Chemical Microsensors for Health Care and Environment Monitoring
Shanhong Xia,Chao Bian,Qiannan Xue,Jizhou Sun,Qingyong Chen 대한전자공학회 2009 ITC-CSCC :International Technical Conference on Ci Vol.2009 No.7
This paper presents several biological and chemical microsensors developed based on micro and nano technologies for the applications of health care and environment monitoring, including micro amperometric biosensor, micro potentiometric immunosensor and micro gas sensor and so on. The electroactivities of the micro amperometric biosensor with three-dimensional microelectrodes was enhanced obviously with the help of the nano- and microstructures. By introducing nanoparticles with seed mediated growth method, the sensitivity of the micro potentiometric immunosensor for %HbA1c has been increased. A micro pellistor with nanoporous alumina catalyst carrier have been constructed for detecting combustible gas below the lower explosive limit, which shows advantages of low power comsumption, good thermal performance and easy fabrication.
( Perumal Silambarasan ),( G. Muthuraman ),문일식 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Instead of only electrolyte in one half-cell in detection gas sensors, addition of mediator precursor can be an added advantageous to reduce the over potential. In the present investigation, 0.1 M CoSO<sub>4</sub> in 5 M H<sub>2</sub>SO<sub>4</sub> or 0.05 M [Ni(CN)<sub>4</sub>]<sup>2-</sup> in 10 M KOH as electrolyte in one half-cell were used with Ag-Ni or Ag-Co metal ions coated Nafion324 membrane electrode divided cell for detection of air pollutants. Based on the cyclic voltammetry and linear sweep voltammetry analyses with and without CoSO<sub>4</sub> and [Ni(CN)<sub>4</sub>]<sup>2-</sup>, the gas phase redox peak was fixed for detection of selected gas pollutants. Then sense a selected air pollutants by amperometric method at different suitable applied voltage. The current with different feed concentration were compared with in-situ FTIR gas analyzer concentration and derived calibration plot.