| Title: | Designing hierarchical nanoporous membranes for highly efficient gas adsorption and storage |
| Author(s): | Mao H; Tang J; Chen J; Wan J; Hou K; Peng Y; Halat DM; Xiao L; Zhang R; Lv X; Yang A; Cui Y; Reimer JA; |
| Address: | "Department of Chemical and Biomolecular Engineering, Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA. Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA. Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 S and Hill Road, Menlo Park, CA 94025, USA. Materials Science Division, Lawrence Berkeley National Lab, Berkeley, CA 94720, USA. Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA. yicui@stanford.edu reimer@berkeley.edu. Department of Chemical and Biomolecular Engineering, Department of Chemistry, University of California, Berkeley, Berkeley, CA 94720, USA. yicui@stanford.edu reimer@berkeley.edu" |
| ISSN/ISBN: | 2375-2548 (Electronic) 2375-2548 (Linking) |
| Abstract: | "Nanoporous membranes with two-dimensional materials such as graphene oxide have attracted attention in volatile organic compounds (VOCs) and H(2) adsorption because of their unique molecular sieving properties and operational simplicity. However, agglomeration of graphene sheets and low efficiency remain challenging. Therefore, we designed hierarchical nanoporous membranes (HNMs), a class of nanocomposites combined with a carbon sphere and graphene oxide. Hierarchical carbon spheres, prepared following Murray's law using chemical activation incorporating microwave heating, act as spacers and adsorbents. Hierarchical carbon spheres preclude the agglomeration of graphene oxide, while graphene oxide sheets physically disperse, ensuring structural stability. The obtained HNMs contain micropores that are dominated by a combination of ultramicropores and mesopores, resulting in high VOCs/H(2) adsorption capacity, up to 235 and 352 mg/g at 200 ppmv and 3.3 weight % (77 K and 1.2 bar), respectively. Our work substantially expands the potential for HNMs applications in the environmental and energy fields" |
| Notes: | "PubMed-not-MEDLINEMao, Haiyan Tang, Jing Chen, Jun Wan, Jiayu Hou, Kaipeng Peng, Yucan Halat, David M Xiao, Liangang Zhang, Rufan Lv, Xudong Yang, Ankun Cui, Yi Reimer, Jeffrey A eng 2020/10/09 Sci Adv. 2020 Oct 7; 6(41):eabb0694. doi: 10.1126/sciadv.abb0694. Print 2020 Oct" |
