Polyaniline-graphite nanoplatelet materials
View Patent ↗Nanocomposite adsorbent materials and methods for their preparation and use are described. As an example, a polyaniline-graphite nanoplatelet nanocomposite may be used to adsorb carbon dioxide.
1. A method of adsorbing carbon dioxide, the method comprising:
providing a nanocomposite adsorbent comprising at least one graphite nanoplatelet having an oxidized surface and at least one polyaniline polymer on the oxidized surface; and
contacting the nanocomposite adsorbent with carbon dioxide.
2. The method of claim 1 , wherein contacting step is performed at about 20° C. to about 110° C.
3. The method of claim 1 , wherein the nanocomposite adsorbent is capable of adsorbing at least about 50 mmol of carbon dioxide per gram of nanocomposite adsorbent at about 11 bar pressure and about 25° C.
4. The method of claim 1 , wherein the nanocomposite adsorbent is capable of adsorbing at least about 20 mmol of carbon dioxide per gram of nanocomposite adsorbent at about 11 bar pressure and about 100° C.
5. The method of claim 1 , further comprising desorbing the adsorbed carbon dioxide after the contacting step.
6. The method of claim 5 , wherein the desorbing step is performed at a pressure of about 10 −5 bar to about 10 −11 bar and a temperature of about 100° C. to about 250° C.
7. The method of claim 5 , wherein adsorption and desorption of carbon dioxide is reversible.