Preparation of porous graphene oxide by chemically intercalating a rigid molecule for enhanced removal of typical pharmaceuticals
Preparation of porous graphene oxide by chemically intercalating a rigid molecule for enhanced removal of typical pharmaceuticals
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DOI：
10.1016/j.carbon.2017.04.021
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发表时间：
2017-08
期刊：
影响因子：
10.9
通讯作者：
Danna Shan;S. Deng;Jin Li;Hubian Wang;Conghui He;G. Cagnetta;Bin Wang-;Yujue Wang;Jun Huang;
中科院分区：
文献类型：
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作者：
Danna Shan;S. Deng;Jin Li;Hubian Wang;Conghui He;G. Cagnetta;Bin Wang-;Yujue Wang;Jun Huang;
通过亲核芳香取代反应将氧化石墨烯（GO）片与邻二氰（TFT）或癸二氯联苯（DFB）连接，成功制备了多孔氧化石墨烯（GO）吸附剂。织构表征表明，合成的GO基吸附剂的比表面积和孔径的增大有利于典型药物的扩散和吸附。GO与20 mmol/L DFB反应制得的吸附剂（GO-DFB 20）对6种药物的去除率最高，且易于分离。GO-DFB 20对卡马西平（CBZ）、磺胺甲恶唑（SMZ）、磺胺嘧啶（SDZ）、布洛芬（IBP）、对乙酰氨基酚（PCT）和非那西丁（PNT）的吸附容量分别为340.5、428.3、214.7、224.3、350.6和316.1 μmol/g。GO-DFB 20对PCT的吸附动力学比SMZ快。根据Langmuir方程拟合，GO-DFB 20对SMZ和PCT的最大吸附容量分别为749.6和663.9 μmol/g。用甲醇成功地再生了GO-DFB 20，连续5个吸附循环的吸附容量损失很小。该研究表明，多孔GO吸附剂具有从水或废水中去除典型药物的前景。
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.