| 학회 | 한국재료학회 |
| 학술대회 | 2018년 가을 (11/07 ~ 11/09, 여수 디오션리조트) |
| 권호 | 24권 2호 |
| 발표분야 | E. 환경/센서 재료 분과 |
| 제목 | Various amino silanes-graphene oxide composites for chromium adsorption |
| 초록 | Chromium compounds are commonly used in a variety of industries, including paint processing, leather tanning, metallurgy and wood preservation. However, Hexavalent chromium (Cr (VI)) is toxic and carcinogenic to human body than the trivalent chromium (Cr (III)). Moreover, it exists as chromate (CrO4-) at normal pH. So it is stable in water and pollutes soil and groundwater. Therefore, many researches has been done to effectively eliminate them. Among others, adsorption is one of promising methods due to high efficiency and operational simplicity. Adsorption, especially using amines, effectively removes Cr (VI) through electrostatic attraction between the positive amines and the CrO4-. In this study, we synthesized amino silanes-GO composites containing 1-3 nitrogen atoms to compare Cr (VI) adsorption capabilities and elucidate the effects of primary and secondary amines on Cr (VI) adsorption. Through various analyses such as Cr (VI) removal experiment, TGA, and XPS, it was confirmed that amino silanes are uniformly grafted on GO surface and Cr (VI) removal efficiency of primary and secondary amines was calculated. In conclusion, we found primary amines are more effective for Cr (Ⅵ) adsorption. But the Cr (VI) adsorption capacity order is 1N-GO ＜ 2N-GO ＜ 3N-GO, which is that total number of amines, the sum of primary and secondary amines was more important. |
| 저자 | 이진형1, 김희곤2, 이정현1, 최재우2, 이승용1 |
| 소속 | 1한국과학기술(연), 2고려대 |
| 키워드 | chromium removal; graphene oxide; adsorbent |
