Fabrication of Graphene Aerogels with Heavily Loaded Metallic Nanoparticles
AbstractNatural biomaterials with hierarchical structures that enable extraordinary capability of detecting chemicals have inspired the interest in producing materials that can mimic these natural structures. This study reports the fabrication of hierarchically-structured, reduced graphene oxide (rGO) aerogels with heavily loaded palladium (Pd), platinum (Pt), nickel (Ni), and tin (Sn) metallic nanoparticles. Metal salts chelated with ethylenediaminetetraacetic acid (EDTA) were mixed with graphene oxide (GO) and then freeze-dried. The subsequent reduction produces rGO/metal nanoparticle aerogels. SEM and EDS results indicated that a loading of 59, 67, 39, and 46 wt % of Pd, Pt, Ni, and Sn nanoparticles was achieved. Pd/rGO aerogels of different Pd nanoparticle concentrations were exposed to H2 gas to monitor the resistance change of the composites. The results suggest that rGO aerogels can achieve a higher nanoparticle loading by using chelation to minimize electrostatic interactions between metal ions and GO. Higher loading of Pd nanoparticles in graphene aerogels lead to improved hydrogen gas sensing performance. View Full-Text
- Supplementary File 1:
PDF-Document (PDF, 1296 KB)
Share & Cite This Article
Shen, C.; Barrios, E.; McInnis, M.; Zuyus, J.; Zhai, L. Fabrication of Graphene Aerogels with Heavily Loaded Metallic Nanoparticles. Micromachines 2017, 8, 47.
Shen C, Barrios E, McInnis M, Zuyus J, Zhai L. Fabrication of Graphene Aerogels with Heavily Loaded Metallic Nanoparticles. Micromachines. 2017; 8(2):47.Chicago/Turabian Style
Shen, Chen; Barrios, Elizabeth; McInnis, Matthew; Zuyus, Joseph; Zhai, Lei. 2017. "Fabrication of Graphene Aerogels with Heavily Loaded Metallic Nanoparticles." Micromachines 8, no. 2: 47.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.