연세대학교 · Engineering
다이 용 김 교수의 연구실은 2차원 나노소재 기반의 고성능 분리막을 개발하는 데 초점을 맞추고 있습니다. 그래핀 옥사이드, 그래핀 나노리본, MXene, MOF 등 다양한 나노소재를 활용해 수증기 및 수분리막의 대량 생산 기술과 분리 성능 향상을 연구하고 있으며, 특히 스케일업 가능한 공정 기술 개발에 주력하고 있습니다. 이는 산업적 응용을 고려한 실용성과 성능의 균형을 추구하는 연구 철학을 반영합니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Graphene oxide (GO) has been a prized material for fabricating separation membranes due to its immense potential and unique chemistry. Despite the academic focus on GO, the adoption of GO membranes in industry remains elusive. One of the challenges at hand for commercializing GO membranes lies with large-scale production techniques. Fortunately, emerging studies have acknowledged this issue, where many have aimed to deliver insights into scalable approaches showing potential to be employed in th
Metal-organic frameworks with high aspect ratios have the potential to yield high-performance gas separation membranes. We demonstrate the scalable synthesis of high–aspect ratio zeolitic imidazolate framework (ZIF)–8 nanoplates via a direct template conversion method in which high aspect ratio–layered Zn hydroxide sheets [Zn<sub>5</sub>(NO<sub>3</sub>)<sub>2</sub>(OH)<sub>8</sub>] were used as the sacrificial precursor. Successful phase conversion occurs as a result of the collaboration of low
In this study, reduced graphene oxide (rGO) and graphene oxide nanoribbons (GONRs) are used to fabricate a composite membrane that exhibits ultrafast water permeance (312.8 L m<sup>-2</sup> h<sup>-1</sup> bar<sup>-1</sup>) and precise molecular separation (molecular weight cutoff: 269 Da), which surpass the upper bound of previously reported polymer and graphene-based nanofiltration membranes. As two-dimensional GONR exhibits a width on the scale of nanometers, its nanochannels can be enlarged w
Nanoporous graphene (size: <italic>ca.</italic> 3 nm, density: <italic>ca.</italic> 10<sup>15</sup> m<sup>−2</sup>) can be synthesized in bulk by KOH activation of pre-oxidized graphite.
Large-scale fabrication of MXene films is in high demand for various applications, but it remains difficult to meet industrial requirements. In this study, we develop a slot-die coating method for the preparation of large-area MXene membranes. The technique allows the fabrication of continuous and scalable coatings with a rapid coating speed of 6 mm s<sup>-1</sup>. The thickness can be readily controlled from the nanometer scale to the micrometer scale, and the alignment of the nanosheet is enha
The preparation of carbon materials based hydrogels and their viscoelastic properties are essential for their broad application and scale-up. However, existing studies are mainly focused on graphene derivatives and carbon nanotubes, and the behavior of graphene nanoribbon (GNR), a narrow strip of graphene, remains elusive. Herein, we demonstrate the concentration-driven gelation of oxidized GNR (graphene oxide nanoribbon, GONR) in aqueous solvents. Exfoliated individual GONRs sequentially assemb
Turbostratic nanoporous carbon sheet membrane fabricated <italic>via</italic> rapid thermal treatment of graphene oxide shows outstanding organic solvent nanofiltration performance, which far exceeds the upper bound of existing membranes.
