Enhancement
of Adsorption Performance for Organic Molecules by Combined Effect
of Intermolecular Interaction and Morphology in Porous rGO-Incorporated
Hydrogels
Seungmin Lee
Byung Joon Moon
Hyun Jung Lee
Sukang Bae
Tae-Wook Kim
Yong Chae Jung
Jong Hyeok Park
Sang Hyun Lee
10.1021/acsami.7b19102.s001
https://acs.figshare.com/articles/journal_contribution/Enhancement_of_Adsorption_Performance_for_Organic_Molecules_by_Combined_Effect_of_Intermolecular_Interaction_and_Morphology_in_Porous_rGO-Incorporated_Hydrogels/6267194
In
this study, we developed reduced graphene oxide (rGO)-incorporated
porous agarose (Ar-rGO) composites that were prepared via a “one-pot”
sol–gel method involving a mixing and vacuum freeze-drying
process. These composites represent an easy-to-use adsorbent for organic
contaminant removal. Ar-rGOs can efficiently adsorb organic molecules,
especially aromatic organic compounds from wastewater, because of
the synergistic effect between the agarose bundles, which function
as a water absorption site, and the rGO sheets, which function as
active sites for pollutant binding. The pore structures and morphology
of the Ar-rGO composites varied according to the added rGO, resulting
in effective water infiltration into the composites. The main adsorption
mechanism of the aromatic organic compounds onto Ar-rGOs involved π–π
interactions with the rGO sheets. The surface interaction was more
effective for adsorbing/desorbing the aromatic pollutants than the
electrostatic interaction via the O-containing functional groups.
In addition, we confirmed that Ar-rGO is highly stable over the entire
pH range (1–13) because of the presence of the rGO sheets.
2018-05-04 00:00:00
function
rGO sheets
water absorption site
composite
vacuum freeze-drying process
compound
agarose
Ar-rGO
pollutant
interaction
Porous rGO-Incorporated Hydrogels