Porous Aerogels and Adsorption of Pollutants from Water and Air: A Review

Franco, Paola; Cardea, Stefano; Marco, Iolanda De

doi:10.3390/molecules26154440

Cited by 66 publications

(12 citation statements)

References 189 publications

(258 reference statements)

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“…No significant decrease in each mechanical property was observed, indicating its robust mechanical strength and high stability. Compared with the recently reported polymer aerogels (Figure e), − our iANF aerogels present lightweight and a low Young’s modulus, indicating their soft intrinsic mechanism. Therefore, low density and high elasticity can be attributed to the combined effect of the organized framework structure and strong bonding, making iANF aerogels potentially advantageous for their use in the field of hyperelasticity.…”

Section: Resultscontrasting

confidence: 51%

Lightweight Aramid Nanofiber Aerogel with a Hierarchical Cellular Structure for Thermal Insulation

Shi

Huan

et al. 2022

ACS Appl. Polym. Mater.

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Excellent insulation materials are urgently needed to insulate or reduce thermal transfer. However, the creation of such materials with ultralow thermal conductivity, high temperature tolerance, and mechanical robustness still faces enormous challenges. Here, a lightweight and robust aramid nanofiber (ANF) aerogel with a hierarchical cellular framework is reported by physically isolate ANFs from poly(p-phenylene terephthalamide) fibers, directional freezing of ANFs to cellular structure, and establishing chemical bonding of ANFs. Given the synergistic effect, the resulting aerogel exhibits a low thermal conductivity of 23.7 mW m −1 K −1 , a low density of 1.42 mg cm −3 , a high porosity of 90%, and a high compressive strain of up to 90%, indicating its excellent overall performance. The successful synthesis of the ANF aerogel may provide insights into the development of lightweight, flexible, and structurally adaptable thermal insulators.

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Section: Resultscontrasting

confidence: 51%

Lightweight Aramid Nanofiber Aerogel with a Hierarchical Cellular Structure for Thermal Insulation

Shi

Huan

et al. 2022

ACS Appl. Polym. Mater.

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“…The past several years has witnessed explosive interest in constructing a series of composites based on the versatile platform of graphene. In order to overcome the problem and make full use of the characteristics of graphene sheets, the conversion of 2D sheet to 3D porous aerogel via self-assembling by various methods, including hydrothermal reduction, chemical reduction, crosslinking, and sol-gel processes, is an ideal choice [ 19 ]. Due to integration intrinsic properties, including high porosity, conductivity, and feasibility of manufacturing in an industrial scale of graphene and aerogel, 3D GAs have emerged as one of the most exciting and promising materials.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in the Synthesis and Application of Three-Dimensional Graphene-Based Aerogels

et al. 2022

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Three-dimensional graphene-based aerogels (3D GAs), combining the intrinsic properties of graphene and 3D porous structure, have attracted increasing research interest in varied fields with potential application. Some related reviews focusing on applications in photoredox catalysis, biomedicine, energy storage, supercapacitor or other single aspect have provided valuable insights into the current status of Gas. However, systematic reviews concentrating on the diverse applications of 3D GAs are still scarce. Herein, we intend to afford a comprehensive summary to the recent progress in the preparation method (template-free and template-directed method) summarized in Preparation Strategies and the application fields (absorbent, anode material, mechanical device, fire-warning material and catalyst) illustrated in Application of 3D GAs with varied morphologies, structures, and properties. Meanwhile, some unsettled issues, existing challenges, and potential opportunities have also been proposed in Future Perspectives to spur further research interest into synthesizing finer 3D GAs and exploring wider and closer practical applications.

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“…Graphene is a purified form of graphite that recently gained enormous popularity in the energy [ 1 , 2 , 3 ], environment [ 4 , 5 , 6 , 7 , 8 ], membranes [ 1 , 7 ], sensor [ 9 , 10 , 11 , 12 ], and biomedical fields [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ]. It is a sp 2 hybridized, hexagonally arranged, chain of polycyclic aromatic hydrocarbon with a honeycomb crystal lattice [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Graphene-Based Nanocomposites for Environmental Remediation Applications: A Review

et al. 2022

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The term graphene was coined using the prefix “graph” taken from graphite and the suffix “-ene” for the C=C bond, by Boehm et al. in 1986. The synthesis of graphene can be done using various methods. The synthesized graphene was further oxidized to graphene oxide (GO) using different methods, to enhance its multitude of applications. Graphene oxide (GO) is the oxidized analogy of graphene, familiar as the only intermediate or precursor for obtaining the latter at a large scale. Graphene oxide has recently obtained enormous popularity in the energy, environment, sensor, and biomedical fields and has been handsomely exploited for water purification membranes. GO is a unique class of mechanically robust, ultrathin, high flux, high-selectivity, and fouling-resistant separation membranes that provide opportunities to advance water desalination technologies. The facile synthesis of GO membranes opens the doors for ideal next-generation membranes as cost-effective and sustainable alternative to long existing thin-film composite membranes for water purification applications. Many types of GO–metal oxide nanocomposites have been used to eradicate the problem of metal ions, halomethanes, other organic pollutants, and different colors from water bodies, making water fit for further use. Furthermore, to enhance the applications of GO/metal oxide nanocomposites, they were deposited on polymeric membranes for water purification due to their relatively low-cost, clear pore-forming mechanism and higher flexibility compared to inorganic membranes. Along with other applications, using these nanocomposites in the preparation of membranes not only resulted in excellent fouling resistance but also could be a possible solution to overcome the trade-off between water permeability and solute selectivity. Hence, a GO/metal oxide nanocomposite could improve overall performance, including antibacterial properties, strength, roughness, pore size, and the surface hydrophilicity of the membrane. In this review, we highlight the structure and synthesis of graphene, as well as graphene oxide, and its decoration with a polymeric membrane for further applications.

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Porous Aerogels and Adsorption of Pollutants from Water and Air: A Review

Cited by 66 publications

References 189 publications

Lightweight Aramid Nanofiber Aerogel with a Hierarchical Cellular Structure for Thermal Insulation

Lightweight Aramid Nanofiber Aerogel with a Hierarchical Cellular Structure for Thermal Insulation

Recent Advances in the Synthesis and Application of Three-Dimensional Graphene-Based Aerogels

Synthesis of Graphene-Based Nanocomposites for Environmental Remediation Applications: A Review

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