Lee, Seungmin Moon, Byung Joon Lee, Hyun Jung Bae, Sukang Kim, Tae-Wook Jung, Yong Chae Park, Jong Hyeok Lee, Sang Hyun 2024-01-19T22:34:16Z 2024-01-19T22:34:16Z 2021-09-03 2018-05-23 1944-8244 https://pubs.kist.re.kr/handle/201004/121364 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 pi-pi 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. English American Chemical Society LOW-COST ADSORBENTS GRAPHENE OXIDE DYE REMOVAL CAPILLARY-PRESSURE AQUEOUS-SOLUTIONS ACTIVATED CARBON METHYLENE-BLUE NANOSHEETS MODEL WATER Enhancement of Adsorption Performance for Organic Molecules by Combined Effect of Intermolecular Interaction and Morphology in Porous rGO-Incorporated Hydrogels Article 10.1021/acsami.7b19102 1 ACS Applied Materials & Interfaces, v.10, no.20, pp.17335 - 17344 ACS Applied Materials & Interfaces 10 20 17335 17344 scie scopus 000433404100046 2-s2.0-85046711121 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Science & Technology - Other Topics Materials Science Article LOW-COST ADSORBENTS GRAPHENE OXIDE DYE REMOVAL CAPILLARY-PRESSURE AQUEOUS-SOLUTIONS ACTIVATED CARBON METHYLENE-BLUE NANOSHEETS MODEL WATER synergetic effects hybrid aerogels porous structure pi-pi interactions adsorbent