Applications of graphene-based composite hydrogels: a review

Lu, Hao; Zhang, Shengtao; Guo, Lei; Li, Weihua

doi:10.1039/c7ra09634h

Cited by 69 publications

(27 citation statements)

References 89 publications

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“…Composed of a porous framework, hydrogels are popular soft materials in electrochemistry, catalysis, sensors, drug delivery, and water treatment [55]. Different from hydrophobic aerogels, hydrogels can absorb large volumes of water in the expanded state because of the abundant hydrophilic groups on their polymeric networks.…”

Section: Three-dimensional Graphene-based Hydrogelsmentioning

confidence: 99%

Graphene-Based Photo-Fenton Catalysts for Pollutant Control

Bao

Yan

et al. 2021

Trans. Tianjin Univ.

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Water pollution is a global environmental issue with multi-dimensional influences on human life. Some strategies, such as photo-Fenton reaction, have been employed to remove recalcitrant pollutants. Two-dimensional (2D) graphene and its three-dimensional (3D) configurations have attracted considerable attention as emerging carbon-based catalysts in photo-Fenton fields owing to their alluring properties in electron transfer, reactant adsorption, and light response. This review summarizes the recent developments in 2D and 3D graphene-based catalysts for photo-Fenton reactions. Their structures, characteristics, activity, and mechanisms are discussed. The conclusions and outlooks are proposed for the profound understanding of challenges and future directions.

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Section: Three-dimensional Graphene-based Hydrogelsmentioning

confidence: 99%

Graphene-Based Photo-Fenton Catalysts for Pollutant Control

Bao

Yan

et al. 2021

Trans. Tianjin Univ.

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“…The applications of graphene-based composite hydrogels and modified graphene nano-materials properties have been exhaustively studied. This material is considered an active and smart material and has been used by several industrial sectors (Lu, Zhang, Guo, & Li, 2017).…”

Section: Future Trendsmentioning

confidence: 99%

Hydrogel as an alternative structure for food packaging systems

Batista

Espitia

Quintans

et al. 2019

Carbohydrate Polymers

193

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Hydrogels are three-dimensional, hydrophilic networks, comprising polymeric chains linked through physical or chemical bonds. In the area of food, hydrogels have great potential to be used in food packaging systems or as carriers of bioactive components. This paper reviews the nature of hydrogels, their 3D network conformation, their functional properties, and their potential applications in food packaging systems. Regarding their potential food packaging applications, hydrogels can present a conformation which allows their use as part of a packaging system to control the humidity generated by food products with high water content. Moreover, the incorporation of nanoparticles into hydrogels may grant them antimicrobial activity. Finally, although the current research in this field is still limited, the results obtained so far are promising for innovative and potential applications in the food field, which also include their integration into intelligent food packaging systems and their direct incorporation into food matrices as a flavor carrier system.

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“…In addition, reduced graphene-based hydrogels can act as a templating material for the inclusion/blending with small molecules, metal/metal oxide nanoparticles, polymer complex, etc. which enable the design of novel multi-functional hydrogels with upgraded properties [23,24]. In term of pollution remediation, reduced graphene hydrogel form π-π interactions with adsorbate molecules containing aromatic rings.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermally Reduced Graphene Hydrogel Intercalated with Divalent Ions for Dye Adsorption Studies

et al. 2021

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Fundamental studies involving divalent ion intercalated graphene-based hydrogel are still lacking in terms of their adsorption behavior towards dye pollutants. In this study, we prepared a self-assembled Mg2+ and Ca2+ intercalated reduced graphene hydrogel (rGH) using hydrothermal treatment to evaluate the intercalation impact on the adsorption capability towards cationic dyes, methylene blue and rhodamine B. The morphological, structural, thermal, and textural properties of the divalent ion intercalated reduced graphene hydrogels were studied using Fourier transform infrared spectrometer, thermogravimetric analysis, Raman spectroscopy, scanning electron microscope-energy dispersive spectroscopy, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller surface area analysis, and X-ray diffraction. The increased adsorption capacity of the divalent ion intercalated reduced graphene-based hydrogels towards the dye molecules resulted from the increase in the specific surface area and pore volume due to the Mg2+ and Ca2+ bridging that formed spaces between the graphene sheets framework. Adsorption kinetics and the equilibrium adsorption isotherm were fitted by a pseudo-second-order alongside intraparticle diffusion kinetic models and Langmuir isotherm respectively. In addition, the divalent ion intercalated reduced graphene hydrogel showed good generation after three cycles of simultaneous adsorption.

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Applications of graphene-based composite hydrogels: a review

Abstract: Graphene-based hydrogels, which utilize graphene as a filler to blend with various molecules, have been widely applied in many fields such as drug delivery, water purification, and energy storage.

Cited by 69 publications

References 89 publications

Graphene-Based Photo-Fenton Catalysts for Pollutant Control

Graphene-Based Photo-Fenton Catalysts for Pollutant Control

Hydrogel as an alternative structure for food packaging systems

Hydrothermally Reduced Graphene Hydrogel Intercalated with Divalent Ions for Dye Adsorption Studies

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