A novel graphene aerogel synthesized from cellulose with high performance for removing MB in water

Li, Jin; Wang, Qin; Zheng, Lei; Liu, Hongbo

doi:10.1016/j.jmst.2019.09.019

Cited by 38 publications

(6 citation statements)

References 56 publications

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“…The internal structures of A3 were looser and had fewer interlayer connections. Before carbonization (Figure 6a), there were many regular columnar pores with diameters ranging from 20 to 100 µm [25,26]. Compared with cellulose aerogel d, the accumulation of columnar pores increases the compressibility direction of the sample.…”

Section: Cellulose/graphite Oxide (Go) Carbon Aerogelsmentioning

confidence: 99%

Self-Assembly and Properties of Elastic Nanocellulose-Carbon Airgel with Ordered Porosity by Template-Free Directional Freezing

Wang

Gong

et al. 2023

Coatings

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Porous cellulose aerogels with different compositions have been fabricated via three methods, including regular freezing, directional freezing, and hydrothermal treatment, using pure cellulose oxide and cellulose oxide/graphite oxide composites, respectively. The cellulose aerogels are highly elastic and light in weight. The carbon aerogels show an ordered structure through directional freezing with layered skeleton bones and some folds. Unlike low-temperature freezing, the structures can obtain elastic properties. When the deformation is 20%, carbon aerogels can rebound to 95% of their original volume. The cellulose oxide/graphite oxide composite aerogels are synthesized into carbon–aerogel composites, which also have stable and robust structures of bone skeletons due to nanosheets. The carbon–aerogel composites have more than 85% resilience under 40% deformations. Carbon aerogels prepared from nanocelluloses have a novel three-dimensional network structure and have the application of elasticity, which is expected to be applied to metallurgical technology and the aerospace field. Through directional freezing, the carbon aerogels have regular structures of layered skeleton bones with some folds. In contrast to low-temperature freezing, the structures possess excellent elastic properties.

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Section: Cellulose/graphite Oxide (Go) Carbon Aerogelsmentioning

confidence: 99%

Self-Assembly and Properties of Elastic Nanocellulose-Carbon Airgel with Ordered Porosity by Template-Free Directional Freezing

Wang

Gong

et al. 2023

Coatings

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“…A contaminated dye with an aromatic structure such as MB will introduce toxicity to marine life and be incorporated in humans by the food chain. When MB is recklessly used, it generates problems such as sweating, vomiting, mental disorders, and hard breathing. , Wastewater purification through conventional methods is not a single-step process. Recently, some advanced oxidation degradation processes (AOPs), catalysis, ion exchange, electrolysis, carbon filtering, and nanofiltration have been introduced.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Industrial Dye Degradation and Antibacterial Activity Supported by the Molecular Docking Study of Yttrium and Carbon Sphere-Doped Lanthanum Oxide Nanostructures

Ayub,

Ikram,

Haider

et al. 2023

ACS Omega

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As the population grows, the scientific community remains focused on researching new materials, methods, and devices to ensure the availability of safe drinking water. The main aim of this research was to decrease the recombination rate of the charge carriers of La 2 O 3 and enhance the catalytic and antimicrobial activity by employing Y/Cs-doped La 2 O 3, respectively. In the current study, different concentrations of yttrium (Y) and a fixed amount of carbon spheres (Cs) doped into lanthanum oxide (La 2 O 3 ) nanostructures (NSs) were synthesized by the coprecipitation technique. Cs are used as a cocatalyst as they have a high surface area and small size attributed to increased active sites and decreased recombination rate. Moreover, Y was further incorporated as it activates the generation of reactive oxygen species in the inhibition zone, enhancing the antibacterial activity and reducing the emission intensity. Advanced techniques were utilized to determine the structural properties, optical emission and absorption, elemental composition, and d-spacing of the synthesized samples. The reported ternary catalyst works efficiently, improving the catalytic activity and bactericidal potential. Moreover, in silico molecular docking studies, Cs-doped La 2 O 3 and Y/Csdoped La 2 O 3 nanostructures toward DNA gyrase Escherichia coli showed good efficacy for antibacterial activity.

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“…Then, by eliminating the oxygen-containing functional groups using reductants, GO layers were reduced into hydrophobic graphene nanosheets with a conjugate structure. Through the effective self-assembly of reduced graphene nanosheets by van der Waals force and π–π stacking, a 3D network graphene hydrogel was formed and after freeze-drying graphene aerogel was obtained. − However, following typical preparation procedures, the obtained graphene aerogels fail to exhibit expected superior performance because of the compact stacking of two-dimensional graphene sheets. , To control the graphene aerogel structure, researchers have introduced various additive materials into the aerogel structure such as carbon nanotubes, cellulose, and lignin, which may act as a support frame to prevent compact stacking as well as to improve the mechanical properties of graphene aerogel . However, these methods would not only complicate the preparation process but also increase cost.…”

Section: Introductionmentioning

confidence: 99%

“…21−23 However, following typical preparation procedures, the obtained graphene aerogels fail to exhibit expected superior performance because of the compact stacking of two-dimensional graphene sheets. 24,25 To control the graphene aerogel structure, researchers have introduced various additive materials into the aerogel structure such as carbon nanotubes, 26 cellulose, 27 and lignin, 28 which may act as a support frame to prevent compact stacking as well as to improve the mechanical properties of graphene aerogel. 29 However, these methods would not only complicate the preparation process but also increase cost.…”

Section: ■ Introductionmentioning

confidence: 99%

Assembly of Ultralight Dual Network Graphene Aerogel with Applications for Selective Oil Absorption

Dai

Sun

et al. 2020

Langmuir

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High-performance graphene aerogels with welldeveloped internal structures are generally obtained by means of introducing additive materials such as carbon nanotubes, cellulose, and lignin into the aerogel network, which not only enhances the cost but also complicates the preparation process. Therefore, tailoring the internal structure of pristine graphene aerogel in a feasible way to achieve high performance is of great significance to the practical applications. Herein, a novel cysteamine/L-ascorbic acid graphene aerogel (CLGA) was fabricated by a simple one-step hydrothermal method followed by freeze-drying. Through the creative combination of the reducing agent L-ascorbic acid and cross-linking agent cysteamine, a dual-network structure was constructed by both layered physical stacking and vertical chemical cross-linking. The addition of cysteamine not only enhanced the reduction degree but also assisted the formation of more vertical connections between graphene nanosheets, resulting in more abundant pores with smaller sizes compared with graphene aerogels prepared by the traditional hydrothermal reduction method. CLGA possessed an ultra-low density of 4.2 mg/cm 3 and a high specific surface area of 397.9 m 2 /g. As expected, this dual-network structure effectively improved the absorption capacity toward a variety of oil and organic solvents, with an outstanding oil absorption capacity up to 310 g/g. Furthermore, CLGA possessed good mechanical properties and oil/water selectivity. The absorbed oil could be recovered by both continuous absorption-removal process and mechanical squeezing, making the as-prepared aerogel superior absorbent material for a variety of applications, such as selective oil absorption and water treatment.

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A novel graphene aerogel synthesized from cellulose with high performance for removing MB in water

Cited by 38 publications

References 56 publications

Self-Assembly and Properties of Elastic Nanocellulose-Carbon Airgel with Ordered Porosity by Template-Free Directional Freezing

Self-Assembly and Properties of Elastic Nanocellulose-Carbon Airgel with Ordered Porosity by Template-Free Directional Freezing

Enhanced Industrial Dye Degradation and Antibacterial Activity Supported by the Molecular Docking Study of Yttrium and Carbon Sphere-Doped Lanthanum Oxide Nanostructures

Assembly of Ultralight Dual Network Graphene Aerogel with Applications for Selective Oil Absorption

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