The preparation of graphene foam by one-step reduction and air-drying for oil–water separation

Geng, Yiyun; Zheng, Li; Chen, Mumei; Zhao, Hongyuan; Zhang, Lan

doi:10.1007/s10971-020-05240-z

Cited by 10 publications

(4 citation statements)

References 32 publications

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“…TPU porous sponge was prepared from thermoplastic polyurethane particles by a thermally induced phase separation approach. − The porous structures are tightly related to the proportion of solvents and the temperature controlling during thermal phase separation. As abovementioned, we started with 8% TPU dissolved at 60 °C in mixed solvents.…”

Section: Resultsmentioning

confidence: 99%

Reduced Graphene Oxide-Doped Porous Thermoplastic Polyurethane Sponges for Highly Efficient Oil/Water Separation

et al. 2023

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In this paper, a porous polyurethane sponge with excellent hydrophobicity was prepared through thermal phase separation. Preparation condition modified experiments were systematically carried out, and a sponge with a saturated oil absorption capacity (13.3 g g–1) and a rapid absorption rate (achieving absorption equilibrium within 20 s) was achieved. The thermoplastic polyurethane (TPU) sponge as an oil absorbent is capable of selectively absorbing various oils/organic solvents from oil/water mixtures with a high recovery rate. To further enhance the hydrophobicity and mechanical properties of the porous sponge, 3% reduced graphene oxide was doped to this material. The morphological investigation indicated that the three-dimensional composite sponges have uniformly distributed micropores and nanopores, and the hydrophobicity and mechanical properties were improved. The composite as a whole exhibited remarkable superelasticity, excellent reversible compressibility, and fatigue resistance (strength up to 186 kPa at 80% strain), which allows it to re-absorb oil by simple manual extrusion. The abovementioned properties make this TPU porous material a promising candidate for practical application in water pollution treatment.

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Section: Resultsmentioning

confidence: 99%

Reduced Graphene Oxide-Doped Porous Thermoplastic Polyurethane Sponges for Highly Efficient Oil/Water Separation

et al. 2023

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“…This peak is commonly observed in the XRD pattern of graphite and is used to identify the presence of graphene. Therefore, the presence of the (002) plane in the XRD pattern at 26°can be an indication of the pure structure of graphene in which each layer was consisting of six-carbon-atoms arranged in a hexagonal pattern not in pentagonal or heptagonal or octagonal patterns, while the sharpness of this peak reveals the large lateral size of the graphene-layers formed on the surfaces of the KCl particles, thereby producing graphene-foam with a high-surface-area [32]. These observations reveal the formation of a graphene layer on the KCl surface, layer by layer under the preparation conditions.…”

Section: Resultsmentioning

confidence: 99%

From date syrup to three-dimensional graphene network

2023

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As a three-dimensional nano-materials, graphene foam is regarded as an ideal choice for a wide array of critical applications due to its porous structure and high surface area. In this study, the main objective is a synthesis of graphene foam via a simple, low-cost, and eco-friendly approach. Graphene foam is synthesized from date-syrup DS which is used as a carbon-enriched source using potassium chloride KCl particles as a scaffold on which graphene layers are built via dehydration and graphitization processes. Characteristic analyses revealed that the Date-Derived-Graphene-Foam DDGF is indeed graphenic material with G and D bands at 1598 cm-1 and 1350 cm-1, respectively with layered and porous structure. The lateral size of the obtained DDGF is determined to be ~6nm. This quick, simple and eco-friendly approach can be good potential in the high-yield production of graphenic-foam.

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“…Air drying is a high-speed, easy, and inexpensive technology at the same time due to the possibility of its application in ambient, experimental conditions and the fact that it does not require special equipment. Geng et al [88] presented a simple, easy, and inexpensive green preparation method for the preparation of graphene aerogel by combining both onestep reduction techniques, freezing, thawing, and air drying.…”

Section: Ice Template or Sol-cryo Methodsmentioning

confidence: 99%

Surface Properties of Graphene and Graphene Oxide Aerogels for Energy Storage Applications

Mahmood,

Hussian

2024

Indones. J. Chem.

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This review is mainly on the relevance of graphene aerogels for energy storage systems highlighting their distinct properties and applications. Today, electronic devices such as smartphones, laptops, and other electrical appliances have become the axe of our daily lives. As a result, electrical energy is required for these devices. Despite the discovery of renewable energy sources as an alternative to fossil fuels, the construction of energy storage systems is still necessary to store energy. Lithium-ion batteries and supercapacitors are considered essential systems for this purpose and have witnessed tremendous development in recent years. The efficiency of these systems depends on the structure of the materials used in their formation. Graphene oxide and graphene aerogel materials improve the properties of energy storage systems in terms of stability of charging and discharging cycles, longevity, and reduction of combustion incidents resulting from ordinary compounds. However, the development of graphene aerogels faces challenges in improving their mechanical properties, the cost of their preparation, and their high agglomeration ability in solvents. Therefore, intensive efforts are needed to develop these materials for a new revolution in energy storage.

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The preparation of graphene foam by one-step reduction and air-drying for oil–water separation

Cited by 10 publications

References 32 publications

Reduced Graphene Oxide-Doped Porous Thermoplastic Polyurethane Sponges for Highly Efficient Oil/Water Separation

Reduced Graphene Oxide-Doped Porous Thermoplastic Polyurethane Sponges for Highly Efficient Oil/Water Separation

From date syrup to three-dimensional graphene network

Surface Properties of Graphene and Graphene Oxide Aerogels for Energy Storage Applications

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