Confined assembly of ultrathin nanoporous nitrogen-doped graphene nanofilms with dual metal coordination chemistry
| Autor: | Chong Shen, Zehai Xu, Guoliang Zhang, Yufan Zhang, Qin Meng, Yinghua Lu, Xu Zhang, Yujie Zhu, Congjie Gao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
Materials science Science Oxide Organic chemistry Nanotechnology 02 engineering and technology Article law.invention 03 medical and health sciences chemistry.chemical_compound Chemical engineering law Bifunctional Multidisciplinary Dopant Graphene Nanoporous 021001 nanoscience & nanotechnology Nanopore Chemistry 030104 developmental biology Membrane Nanocrystal chemistry 0210 nano-technology |
| Zdroj: | iScience, Vol 24, Iss 6, Pp 102576-(2021) iScience |
| ISSN: | 2589-0042 |
| Popis: | Summary Graphene oxide (GO) nanosheets with unique structure have received much attention in providing opportunity for high-performance membranes in separation. However, the rational design of ultrathin graphene membranes with controlled structures remains a big challenge. Here, we report a methodology to synthesize dual metal-coordinated ultrathin nanoporous graphene nanofilms by tailoring well-aligned nanocrystals as building blocks on heteroatom-doped GO nanosheets with tunable architectures. Manipulation of metal nitrate as bifunctional dopants realizes N-doping of graphene oxide and preferential growth of α-Mn2O3 nanocrystals. Generation of Mn-O-C bond during cross-linking greatly strengthens the stability of membranes for long-term steady operation. Meanwhile, because of spatial confinement effects and high binding energy, N-doped reduced GO nanosheets are desirable supports to construct numerous Mn-N-C bonds, thus generating artificial nanopores to significantly increase nanochannels for ultrafast mass transport. Moreover, the size-selective permeability of ultrathin nanoporous GO-based nanofilms can be optimized by managing the types of metal source for target coordination. Graphical abstract Highlights • Dual metal-coordinated GO-based nanofilms are achieved by a general and facile method • Mn-N-C bonds are constructed in rGO nanosheets with N-containing coordinated links • Artificial nanopores are used to increase nanochannels for ultrafast mass transport • Generation of Mn-O-C bond greatly strengthens the stability of nanofilms in separation Chemistry; Chemical engineering; Organic chemistry |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|