Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 508196
Title Flexible 3D Nanoporous Graphene for Desalination and Bio-decontamination of Brackish Water via Asymmetric Capacitive Deionization
Author(s) El-Deen, Ahmed G.; Boom, Remko M.; Kim, Hak Yong; Duan, Hongwei; Chan-Park, Mary B.; Choi, Jae Hwan
Source ACS Applied Materials and Interfaces 8 (2016)38. - ISSN 1944-8244 - p. 25313 - 25325.
DOI http://dx.doi.org/10.1021/acsami.6b08658
Department(s) Food Process Engineering
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) asymmetric capacitive deionization - nanohybrid electrode - nanoporous graphene - water desalination - water disinfection
Abstract

Nanoporous graphene based materials are a promising nanostructured carbon for energy storage and electrosorption applications. We present a novel and facile strategy for fabrication of asymmetrically functionalized microporous activated graphene electrodes for high performance capacitive desalination and disinfection of brackish water. Briefly, thiocarbohydrazide coated silica nanoparticles intercalated graphene sheets are used as a sacrificial material for creating mesoporous graphene followed by alkaline activation process. This fabrication procedure meets the ideal desalination pore diameter with ultrahigh specific surface area ∼ 2680 m2 g-1 of activated 3D graphene based micropores. The obtained activated graphene electrode is modified by carboxymethyl cellulose as negative charge (COO-2) and disinfectant quaternary ammonium cellulose with positively charged polyatomic ions of the structure (NR4 +). Our novel asymmetric coated microporous activated 3D graphene employs nontoxic water-soluble binder which increases the surface wettability and decreases the interfacial resistance and moreover improves the electrode flexibility compared with organic binders. The desalination performance of the fabricated electrodes was evaluated by carrying out single pass mode experiment under various cell potentials with symmetric and asymmetric cells. The asymmetric charge coated microporous activated graphene exhibits exceptional electrosorption capacity of 18.43 mg g-1 at a flow rate of 20 mL min-1 upon applied cell potential of 1.4 V with initial NaCl concentration of 300 mg L-1, high charge efficiency, excellent recyclability, and, moreover, good antibacterial behavior. The present strategy provides a new avenue for producing ultrapure water via green capacitive deionization technology.

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