Abstract
Thermally exfoliated graphene nanoplates were found to be a novel high efficiency sorbent for the capture of CO 2. The exfoliated graphene nanoplates were expanded successfully from graphite oxide by a low-heat treatment at temperatures ranging from 150 to 400°C under vacuum conditions. The texture was analyzed by N 2 full isotherms and XRD. The CO 2 capture characteristics of the graphene nanoplates at 25°C and 30bar were examined using a pressure-composition-temperature apparatus. The inter-layer spacing of the graphene layers and pore structure on the CO 2 capture capacities were studied as a function of the processing conditions. The prepared graphene nanoplates exhibited high capture capacities, up to 248wt.%, at 25°C and 30bar. The improved CO 2 capture capacity of the graphene nanoplates was attributed to the larger inter-layer spacing and higher interior void volume.
| Original language | English |
|---|---|
| Pages (from-to) | 285-290 |
| Number of pages | 6 |
| Journal | Journal of Colloid and Interface Science |
| Volume | 386 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 15 Nov 2012 |
| Externally published | Yes |
Keywords
- CO capture
- Graphene nanoplates
- Thermally exfoliation
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