کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1329808 1500092 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Polydopamine-mediated surface-functionalization of graphene oxide for heavy metal ions removal
ترجمه فارسی عنوان
سطح فعال سازی پلییدوپامین در سطح اکسید گرافین برای حذف یونهای فلزات سنگین
کلمات کلیدی
اکسید گرافن، پولیدپامین، جذب یون فلزات سنگین، کاربردکردن سطح
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
چکیده انگلیسی


• We prepared polyethylenimine grafted polydopamine-mediated graphene oxide composites.
• Introduction of PD layer increases metal ions adsorption capacity.
• PEI–PD/RGO aerogel exhibited a superior adsorption performance.
• PEI–PD/RGO aerogel can be recycled several times in a simple way.

By utilizing polydopamine (PD) nano-thick interlayer as mediator, polyethylenimine (PEI) brushes with abundant amine groups were grafted onto the surface of PD coated graphene oxide (GO) uniformly via a Michael-Addition reaction and produced a PEI–PD/GO composite nanosheets. The PEI–PD/GO composite exhibited an improved performance for adsorption of heavy metal ions as compared to PEI-coated GO and pure GO. The adsorption capacities for Cu2+, Cd2+, Pb2+, Hg2+ are up to 87, 106, 197, and 110 mg/g, respectively. To further make the GO based composite operable, PEI–PD/RGO aerogel was prepared through hydrothermal and achieved a high surface area up to 373 m2/g. Although the adsorption capacity of PEI–PD/RGO aerogel for heavy metal ions decreases a little as compared to PEI–PD/GO composite dispersion (38, 32, 95, 113 mg/g corresponding to Cu2+, Cd2+, Pb2+, and Hg2+, respectively), it could be recycled several times in a simple way by releasing adsorbed metal ions, indicating its potential application for cleaning wastewater.

Polyethylenimine (PEI) brushes were grafted onto the surface of graphene oxide (GO) uniformly via a Michael-Addition reaction between the PEI and polydopamine interlayer coated on GO surface. The PEI–PD/GO composite exhibited an improved performance for adsorption of heavy metal ions compared to PEI-coated GO and pure GO .Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 224, April 2015, Pages 88–93
نویسندگان
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