| 학회 | 한국화학공학회 |
| 학술대회 | 2015년 가을 (10/21 ~ 10/23, 일산 KINTEX) |
| 권호 | 21권 2호, p.1400 |
| 발표분야 | 고분자 |
| 제목 | Scalable production of graphene membranes with narrow atomic pores by chemical activation |
| 초록 | Graphene with atomic pores ＜1 nm in size can be an ideal membrane because of their two-dimensional atomic-scale layer, low biofouling tendencies, chemical resistance, mechanical durability, high selectivity, and fast molecular transport across the membrane. Although atomic pores in bulk-scale graphene is essential to realizing the mass production of high-performance graphene membranes, current studies on graphene membranes rely on low-scale production of graphene with mesopore or nanopore structures and graphene oxide. In this study, we found that simple potassium hydroxide activation can generate precise atomic vacancy defects (~5 Å) in bulk scale graphene while maintaining a two-dimensional sp2 carbon bonded structure. Permeation tests show very fast permeation of H 2 gas through the graphene membrane with atomic vacancy defects on its basal plane even at low differential pressure (5 kPa), but CH 4 (＜13 kPa), N 2 (＜24 kPa) and CO 2 (＜37 kPa) cannot permeate the membrane. Additionally, prepared graphene membranes with atomic pores were used for desalination, showing the high rejection of NaCl. We believe that our approach will play a key role in the economical mass production of graphene membranes used in various applications, such as gas and water purification and electrochemical devices. |
| 저자 | 정희태 , 김대우 |
| 소속 | 한국과학기술원 |
| 키워드 | 그래핀 ; 분리막 ; 담수화 ; 가스분리 |
| VOD | VOD 보기 |
| 원문파일 | 초록 보기 |
