Preparation of porous graphene oxide by chemically intercalating a rigid molecule for enhanced removal of typical pharmaceuticals. (August 2017)

• Record Type: Journal Article
• Authors: Shan, Danna; Deng, Shubo; Li, Jin; Wang, Hubian; He, Conghui; Cagnetta, Giovanni; Wang, Bin; Wang, Yujue; Huang, Jun; Yu, Gang
• Is Part Of: Carbon. Volume 119(2017)
• Page Start: 101
• Page End: 109
• Publication Date: 2017-08
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2017.04.021
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Porous graphene oxide (GO) adsorbents were successfully prepared by connecting GO sheets with tetrafluoroterephthalonitrile (TFT) or decafluorobiphenyl (DFB) through a nucleophilic aromatic substitution reaction. Textural characterization indicated that the enlarged surface area and pore size of the as-synthesized GO-based adsorbents were favorable for the diffusion and adsorption of the typical pharmaceuticals. The GO reacted with 20 mmol/L DFB (GO-DFB20) exhibited the highest removal for six pharmaceuticals among the prepared adsorbents, and can be separated easily. The adsorption capacities of GO-DFB20 for carbamazepine (CBZ), sulfamethoxazole (SMZ), sulfadiazine (SDZ), ibuprofen (IBP), paracetamol (PCT) and phenacetin (PNT) were 340.5, 428.3, 214.7, 224.3, 350.6 and 316.1 μmol/g, respectively. The adsorption kinetics of PCT on the GO-DFB20 was faster than SMZ. According to the Langmuir fitting, the maximum adsorption capacities of GO-DFB20 for SMZ and PCT were 749.6 and 663.9 μmol/g, respectively. The spent GO-DFB20 was successfully regenerated by methanol with little loss of adsorption capacity in five successive adsorption cycles. This study shows that the porous GO adsorbent has a promising application for the removal of typical pharmaceuticals from water or wastewater. Graphical abstract: