| 학회 | 한국재료학회 |
| 학술대회 | 2017년 가을 (11/15 ~ 11/17, 경주 현대호텔) |
| 권호 | 23권 2호 |
| 발표분야 | E. 환경/센서 재료 분과 |
| 제목 | A study on Cl- ion sensors based on CNT, CuBTC, and Ag nanoparticles. |
| 초록 | Unexpected degradations of building structures caused enormous losses of life and property. Corrosion is the main reason of the degradation. Thus, buildings should be monitored to prevent them from destruction. Many factors, including H2O, OH-, Cl-, oxygen, etc., contribute to degradation of structure. Among them, chloride ion is major factor of degradation because it leads to strong influence on the corrosion of reinforcing steel. Therefore, quantitative inspection of chloride ion concentration must be required to increase the accuracy of durability monitoring. One of the most well-known method for assessment of chloride content is to use the silver/silver chloride electrode sensor. However, this electrode has some weak points such as low chemical stability and durability of sensor when using in high pH environment. These problems made it hard to analyze the damage of civil structures. Carbon nanotube (CNT) is a type of carbon group materials, which has high chemical resistivity, large surface area and superior electrical property. Unfortunately, CNT does not have the chloride ion sensing characteristics. Therefore, CuBTC and silver nanoparticles were added to improve the sensing properties. In this study, sensing elements were synthesized by chemical reaction process. Functionalized CNT and CuBTC were deposited on PTFE paper filter. Electroless deposition process was performed to deposit the silver nanoparticles. Surface morphology and composition analysis were characterized by scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS), respectively. X-ray photoelectron spectroscopy (XPS) was also performed to confirm the existence of sensing materials. The electrical properties of sensors were measured by semiconductor analyzer in the range from -1 V to 1 V. The chloride ion sensing characteristics were confirmed with the variation of the resistance at 1 V. |
| 저자 | 곽병관, 박수빈, 유봉영 |
| 소속 | 한양대 |
| 키워드 | <P>Cl<SUP>-</SUP> sensor; cnt; cubtc; silver nanoparticles<BR></P> |
