Graphene oxide-branched polyethylenimine foams for efficient removal of toxic cations from water

Pakulski, Dawid; Czepa, Włodzimierz; Witomska, Samanta; Aliprandi, Alessandro; Pawluć, Piotr; Patroniak, Violetta; Ciesielski, Artur; Samorı́, Paolo

doi:10.1039/c8ta01622d

Cited by 85 publications

(40 citation statements)

References 57 publications

(38 reference statements)

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“…To overcome this problem, one of the most efficient methods is to modify graphene oxide by the polyelectrolytes with opposite charge. Polyethylenimine is regarded as one of the ideal cationic polyelectrolytes to functionalize graphene oxide and form hybrid materials to promote the potential application of GO . In this work, polyethylenimine‐grafted graphene oxide (GO‐PEI) was constructed as a novel scaffold for the immobilization of formate dehydrogenase.…”

Section: Introductionmentioning

confidence: 99%

Immobilization of formate dehydrogenase on polyethylenimine‐grafted graphene oxide with kinetics and stability study

Lin

Zhang

Yao

et al. 2019

Engineering in Life Sciences

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Graphene oxide‐based nanomaterials are promising for enzyme immobilization due to the possibilities of functionalizing surface. Polyethylenimine‐grafted graphene oxide was constructed as a novel scaffold for immobilization of formate dehydrogenase. Compared with free formate dehydrogenase and graphene oxide adsorbed formate dehydrogenase, thermostability, storage stability, and reusability of polyethylenimine‐grafted graphene oxide‐formate dehydrogenase were enhanced. Typically, polyethylenimine‐grafted graphene oxide‐formate dehydrogenase remained 47.4% activity after eight times’ repeat reaction. The immobilized capacity of the polyethylenimine‐grafted graphene oxide was 2.4‐folds of that of graphene oxide. Morphological and functional analysis of polyethylenimine‐grafted graphene oxide‐formate dehydrogenase was performed and the assembling mechanism based on multi‐level interactions was studied. Consequently, this practical and facile strategy will likely find applications in biosynthesis, biosensing, and biomedical engineering.

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Section: Introductionmentioning

confidence: 99%

Immobilization of formate dehydrogenase on polyethylenimine‐grafted graphene oxide with kinetics and stability study

Lin

Zhang

Yao

et al. 2019

Engineering in Life Sciences

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“…constitutes one of the key factors for understanding the adsorption on carbon-based materials. [32,74] The point of zero charge of SiO2NH2-GO corresponds to pH = 7.0 ( Figure S10). Thus, at pH>7 (pH>pHpzc), the surface charge of composite is negative.…”

Section: Kinetics and Thermodynamics Of Adsorptionmentioning

confidence: 99%

“…To overcome this drawback, the functionalization of GO with organic and inorganic moieties have been explored which resulted in a large library of GO-based materials exhibiting strong adsorption affinity towards various pollutants. [28,[30][31][32][33][34][35][36][37][38] In this case, the fabrication of functionalized materials through covalent reactions between pristine GO nanosheets are particularly attractive. Noteworthy, the functionalization presented in this work aimed at generating a hybrid system in which synergistic effect between both components is one of the most important features of the newly obtained composite.…”

Section: Introductionmentioning

confidence: 99%

Graphene oxide-mesoporous SiO2 hybrid composite for fast and efficient removal of organic cationic contaminants

Czepa

Pakulski

Witomska

et al. 2020

Carbon

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In this study, we have developed a novel mesoporous SiO2-graphene oxide hybrid material (SiO2NH2-GO) as highly efficient adsorbent for removal of cationic organic dyes from water. The fabrication of such a three-dimensional (3D) SiO2NH2-GO composite has been achieved via the condensation reaction between the amine units exposed on 3-aminopropylfunctionalized silica nanoparticles and the epoxy groups on surface of GO. As a proof-ofconcept, SiO2NH2-GO was used for the removal of archetypical dyes from water and revealed outstanding maximum adsorption capacity towards methylene blue (MB), rhodamine B (RhB) and methyl violet (MV) at pH 10 reaching 300, 358 and 178 mg g-1 for MB, RhB and MV, respectively, thus outperforming the neat components of composite, i.e. GO and SiO2. Moreover, the adsorption process revealed that ~ 99.7 % of MB, RhB and MV have been removed in only 3 min thereby highlighting the superior nature of SiO2NH2-GO composite with respect to most of graphene oxide-based adsorbents of organic dyes. Finally, the composite was used in solid phase extraction (SPE) as column packing material, for continuous water purification, thus highlighting the great potential of SiO2NH2-GO for the large-scale removal of cationic dyes from aqueous solutions.

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“…[1] Two-dimensional materials like graphene, hexagonal boron nitride and MXenes have high surface-to-volume ratio and two planar surfaces available for adsorption. [2] Considering hydrophilic nature of graphene, graphene oxide (GO) shows better potential in the removal of ions from aqueous solutions, with its strong hydrophilic nature and large surface area. [3] Moreover GO, as a highly oxidized form of graphene, contains various functional groups including hydroxyl, carboxyl and epoxide units on the surface.…”

Section: Extended Abstractmentioning

confidence: 99%

2D Materials Based Hybrid for Efficient Removal of Heavy Metal Ions

Mikołajczak¹,

Witomska²,

Czepa³

et al. 2019

Proceedings of the 4th World Congress on Recent Advances in Nanotechnology

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Graphene oxide-branched polyethylenimine foams for efficient removal of toxic cations from water

Abstract: Highly porous foams based on graphene oxide functionalized with branched polyethylenimine are generated and used with unprecedented efficiency for adsorbing heavy metal ions.

Cited by 85 publications

References 57 publications

Immobilization of formate dehydrogenase on polyethylenimine‐grafted graphene oxide with kinetics and stability study

Immobilization of formate dehydrogenase on polyethylenimine‐grafted graphene oxide with kinetics and stability study

Graphene oxide-mesoporous SiO2 hybrid composite for fast and efficient removal of organic cationic contaminants

2D Materials Based Hybrid for Efficient Removal of Heavy Metal Ions

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