Progress in modifications of 3D graphene-based adsorbents for environmental applications

Lin, Yan; Tian, Yanqin; Sun, Hefei; Hagio, Takeshi

doi:10.1016/j.chemosphere.2020.129420

Cited by 42 publications

(17 citation statements)

References 191 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[68,69] These composites mainly focuses on enhancing the covalent functionalization and weakening the hydrophobic attraction depending on the π structure and functional groups on graphene materials. [70] So the 3D-GF-PA and 3D-GF-AA have stronger binding ability with structural ─OH. As AA molecules are smaller and more hydrophilic, it is more conducive to hydration.…”

Section: D-gf-lioh•h 2 O Morphology and Structure Characterizationmentioning

confidence: 97%

Comparative Analysis of 3D Graphene–LiOH·H₂O Composites by Modification with Phytic Acid and Ascorbic Acid for Low‐Grade Thermal Energy Storages

Zeng

et al. 2021

Energy Tech

View full text Add to dashboard Cite

3D Graphene (3D‐GF) modified with different additive concentrations (phytic acid [PA] and ascorbic acid [AA]) is developed and then combined with different LiOH contents by the hydrothermal method to obtain composite materials. It can be found that the addition of PA and AA will not destroy the carbon skeleton structure of 3D‐GF. With increasing additive content, the thermal conductivities of modified 3D‐GF first increase and reach their maximum values at 8 mg mL−1. The modified 3D‐GF with the highest thermal conductivity is selected to be combined with different LiOH contents. The addition of PA and AA can broaden the charging temperature range from 60–110 to 30–200 °C and improve the LiOH hydration rate and heat storage density. Compared with the PA‐modified composite, the AA‐modified composite shows smaller (about 7.6 nm) and more uniform LiOH·H2O particles (the particles size standard deviation of 3D‐GF‐AA‐LiOH·H2O is 1.1503), a larger specific surface area (119 m2 g−1), higher heat storage density (the highest value of 2763 kJ kg−1 for LiOH⋅H2O, which can be about 4.2 times of pure LiOH), and less influenced by the change of LiOH content (the thermal conductivity standard deviation of 3D‐GF‐AA‐LiOH·H2O is 0.123).

show abstract

Section: D-gf-lioh•h 2 O Morphology and Structure Characterizationmentioning

confidence: 97%

Comparative Analysis of 3D Graphene–LiOH·H₂O Composites by Modification with Phytic Acid and Ascorbic Acid for Low‐Grade Thermal Energy Storages

Zeng

et al. 2021

Energy Tech

View full text Add to dashboard Cite

show abstract

“… Pictorial representation of the mechanisms involved during removal of various pollutants by using three-dimensional graphene materials. Reprinted with permission from [ 10 ], Copyright Elsevier, 2020. …”

Section: Figurementioning

confidence: 99%

“…In fact, modulation of oxidation level, size, and surface chemistry via derivatization allows for the removal of different classes of air and aqueous pollutants, including either polar or nonpolar aliphatic and aromatic molecules, waste gases, refractory organics, heavy metals, salts, oils, and so on. A generic representation of the mechanisms that graphene materials exploit for the removal of various pollutants is provided in Figure 1 [ 10 ]. GO is more prone to further derivatization reactions that encompass both non-covalent and covalent functionalization approaches, while graphene, due to the prevalence of sp 2 -conjugated carbons, is preferably functionalized via π–π stacking complexation or introducing specific moieties onto edge or basal planes, as depicted in Figure 2 [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

An Overview of Functionalized Graphene Nanomaterials for Advanced Applications

et al. 2021

View full text Add to dashboard Cite

Interest in the development of graphene-based materials for advanced applications is growing, because of the unique features of such nanomaterials and, above all, of their outstanding versatility, which enables several functionalization pathways that lead to materials with extremely tunable properties and architectures. This review is focused on the careful examination of relationships between synthetic approaches currently used to derivatize graphene, main properties achieved, and target applications proposed. Use of functionalized graphene nanomaterials in six engineering areas (materials with enhanced mechanical and thermal performance, energy, sensors, biomedical, water treatment, and catalysis) was critically reviewed, pointing out the latest advances and potential challenges associated with the application of such materials, with a major focus on the effect that the physicochemical features imparted by functionalization routes exert on the achievement of ultimate properties capable of satisfying or even improving the current demand in each field. Finally, current limitations in terms of basic scientific knowledge and nanotechnology were highlighted, along with the potential future directions towards the full exploitation of such fascinating nanomaterials.

show abstract

“…Moreover, the high surface areas and porous structures give rise to the efficient transport and trapping of the pollutants, while the 3D structures can be further functionalized using covalent and non-covalent methodologies [87,88]. The various methods used in the formation of porous 3D graphene structures can be found in a recent review by Lin et al [30], highlighting the increasing interest in 3D graphene-based materials. In Figure 1, a schematic illustration of a 3D GO-based magnetic polymeric aerogel is shown, where the 3D network was formed using freeze-drying and contains magnetic Fe 3 O 4 nanoparticles, polyvinyl alcohol (PVA), cellulose and GO sheets.…”

Section: Recovery Of the Go Adsorbentmentioning

confidence: 99%

“…Given the scientific interest in graphene and GO and the increasing attention that these materials are receiving as adsorbents for the elimination of various contaminants from aquatic environments, a number of review articles have already been published describing the applications of GO as an adsorbent material [23][24][25][26][27]. Moreover, the performances of magnetic GO [28] and 3D graphene-based adsorbents [29,30] have been reviewed recently. Here, we concentrate on the applications of GO/CS composites as adsorbents for the removal of pollutants from aqueous environments.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Based Materials Immobilized within Chitosan: Applications as Adsorbents for the Removal of Aquatic Pollutants

et al. 2021

View full text Add to dashboard Cite

Graphene and its derivatives, especially graphene oxide (GO), are attracting considerable interest in the fabrication of new adsorbents that have the potential to remove various pollutants that have escaped into the aquatic environment. Herein, the development of GO/chitosan (GO/CS) composites as adsorbent materials is described and reviewed. This combination is interesting as the addition of graphene to chitosan enhances its mechanical properties, while the chitosan hydrogel serves as an immobilization matrix for graphene. Following a brief description of both graphene and chitosan as independent adsorbent materials, the emerging GO/CS composites are introduced. The additional materials that have been added to the GO/CS composites, including magnetic iron oxides, chelating agents, cyclodextrins, additional adsorbents and polymeric blends, are then described and discussed. The performance of these materials in the removal of heavy metal ions, dyes and other organic molecules are discussed followed by the introduction of strategies employed in the regeneration of the GO/CS adsorbents. It is clear that, while some challenges exist, including cost, regeneration and selectivity in the adsorption process, the GO/CS composites are emerging as promising adsorbent materials.

show abstract

Progress in modifications of 3D graphene-based adsorbents for environmental applications

Cited by 42 publications

References 191 publications

Comparative Analysis of 3D Graphene–LiOH·H₂O Composites by Modification with Phytic Acid and Ascorbic Acid for Low‐Grade Thermal Energy Storages

Comparative Analysis of 3D Graphene–LiOH·H₂O Composites by Modification with Phytic Acid and Ascorbic Acid for Low‐Grade Thermal Energy Storages

An Overview of Functionalized Graphene Nanomaterials for Advanced Applications

Graphene-Based Materials Immobilized within Chitosan: Applications as Adsorbents for the Removal of Aquatic Pollutants

Contact Info

Product

Resources

About

Progress in modifications of 3D graphene-based adsorbents for environmental applications

Cited by 42 publications

References 191 publications

Comparative Analysis of 3D Graphene–LiOH·H2O Composites by Modification with Phytic Acid and Ascorbic Acid for Low‐Grade Thermal Energy Storages

Comparative Analysis of 3D Graphene–LiOH·H2O Composites by Modification with Phytic Acid and Ascorbic Acid for Low‐Grade Thermal Energy Storages

An Overview of Functionalized Graphene Nanomaterials for Advanced Applications

Graphene-Based Materials Immobilized within Chitosan: Applications as Adsorbents for the Removal of Aquatic Pollutants

Contact Info

Product

Resources

About

Comparative Analysis of 3D Graphene–LiOH·H₂O Composites by Modification with Phytic Acid and Ascorbic Acid for Low‐Grade Thermal Energy Storages

Comparative Analysis of 3D Graphene–LiOH·H₂O Composites by Modification with Phytic Acid and Ascorbic Acid for Low‐Grade Thermal Energy Storages