Facile Synthesis of Single‐ and Multi‐Layer Graphene/Mn<sub>3</sub>O<sub>4</sub> Integrated 3D Urchin‐Shaped Hybrid Composite Electrodes by Core‐Shell Electrospinning

Poudeh, Leila Haghighi; Letofsky-Papst, Ilse; Cebeci, Fevzi Çakmak; Menceloǵlu, Yusuf́ Z.; Yıldız, Mehmet; Okan, Burcu Saner

doi:10.1002/cnma.201900191

Cited by 17 publications

(1 citation statement)

References 33 publications

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“…The G band is related to the E2g photons of sp 2 carbon atoms, the carbon-carbon double bond, and the D band is related to the sp 3 carbon atom vibrations in the graphene oxide structure (Jabbar et al, 2017). The double and wide 2D band of another characteristic of graphene oxide (Figure 5) at 2835 cm -1 and 2932 cm -1 indicates the formation of multilayered graphene oxide along the c axis in the studied composition (Haghighi Poudeh et al, 2019). For the PANI compound, the C−H bending vibration in the benzenoid ring is 1169 cm -1 , the C−N + stretching vibration is 1329 cm -1 , the C=N stretching vibration is 1509 cm -1, and the C=C stretching vibrations in the quinoid are in 1597 cm -1 appear, which…”

Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 88%

Improving the Co-removal Efficiency of Dyes from Water by a Novel Four-Component Chitosan Flexible Film Containing Graphene Oxide

Salami,

Bahram,

Farhadi

et al. 2024

J Polym Environ

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In the present study, a novel four-component flexible film based on α-ketoglutaric acid, chitosan, polyaniline, and graphene oxide (α-CTS-PANI-GO) was synthesized and characterized by Scanning Electron Microscope (SEM), Fourier Transform Infrared Spectroscopy (FT-IR), and Raman spectroscopy. The simultaneous removal properties of α-CTS-PANI-GO were evaluated in the removal of cationic and anionic dyes, Methylene Blue (MB) and Acid Orange 7 (AO7). Using the Central Composite Decomposition (CCD), the effect of different variables such as pH, temperature, adsorbent dose, and time on AO7 and MB removal was studied. Various isotherm models, such as Langmuir and Freundlich, were investigated, and the processing of experimental equilibrium data confirmed the suitability and application of the Langmuir model. Analysis of experimental adsorption data using various kinetic models, such as quasi-first and second-order models, shows the applicability of the firstorder equation. The results showed that in the optimal conditions, the removal percentage was about 95% for AO7 and 80% for MB, which indicates the successful performance of the synthetic film compared to the method.

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Section: Fourier Transform Infrared Spectroscopy (Ftir)mentioning

confidence: 88%

Improving the Co-removal Efficiency of Dyes from Water by a Novel Four-Component Chitosan Flexible Film Containing Graphene Oxide

Salami,

Bahram,

Farhadi

et al. 2024

J Polym Environ

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A Novel Method to Fabricate Nitrogen and Oxygen Co‐Doped Flexible Cotton‐Based Electrode for Wearable Supercapacitors

et al. 2019

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In this work, we prepared a nitrogen and oxygen co‐doped flexible cotton‐based carbon electrode with high electrochemical performance by using a simple dyeing and carbonization method for its potential application in wearable energy storage devices. The optimized dyed cotton‐based electrode with 10 % o.w.f. (percentage on weigh of fabric) dyeing concentration shows a high areal specific capacitance of 1836±20 mF cm−2 at 2 mA cm−2 in aqueous 6 M KOH, superior cycling lifespan (99.1 % capacitance retention after 5000 cycles), good coulombic efficiency, and high rate property. The outstanding properties can be attributed to the synergistic effect between the double‐layer capacitance (superior conductivity, large surface area, and good wetability) and the extra pseudocapacitance originating from N and O heteroatoms in the dye molecules. More importantly, the symmetric supercapacitor created with CDF‐10 % electrodes exhibits a significant volumetric specific capacitance of 18.2 F cm−3 and energy density of 5.7 mWh cm−3 at a power density of 45.2 mW cm−3, which can power an electronic clock for several minutes. The impressive resulting performance demonstrates that this inexpensive synthetic method, which can be scaled‐up, can be used to create promising materials for wearable electronics.

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Tuning Nitrogen Species in Two‐Dimensional Carbon through Pore Structure Change for High Supercapacitor Performance

et al. 2019

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Carbonaceous materials have long been a key component of supercapacitor energy storage systems, and exploring nitrogen atom doping and its role is currently the focus of carbon-based electrode development. However, achieving a high proportion of pyridinic N (active N) in N-doped carbon is still a big challenge. Here, by introducing a triblock copolymer F127 into the phenolic resin, the pore structure of the two-dimensional carbon material is successfully adjusted, thereby increasing the probability of generation of active nitrogen. We found that this two-dimensional porous structure is beneficial to the formation of pyridinic N. Through the change of pore structure, the ratio of pyridinic N to the total N was further increased by 13.9 %.Therefore, it provides a large specific capacitance (220 F g À 1 ), excellent cycle stability (93.6 %) and high rate performance (71.2 %) in the alkaline KOH electrolyte. To further increase the energy density, we constructed an symmetrical supercapacitor device using an ionic liquid electrolyte (equal amount of 1ethyl-3-methylimidazolium tetrafluoroborate and acetonitrile). As a result, since the electrolyte has a voltage window of up to 3 V, the energy density is as high as 37.5 Wh kg À 1 . This superior performance indicates that adjusting the ratio of pyridinic N provides a promising method for preparing excellent N-doped carbon materials for energy storage systems.

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Facile Synthesis of Single‐ and Multi‐Layer Graphene/Mn₃O₄ Integrated 3D Urchin‐Shaped Hybrid Composite Electrodes by Core‐Shell Electrospinning

Cited by 17 publications

References 33 publications

Improving the Co-removal Efficiency of Dyes from Water by a Novel Four-Component Chitosan Flexible Film Containing Graphene Oxide

Improving the Co-removal Efficiency of Dyes from Water by a Novel Four-Component Chitosan Flexible Film Containing Graphene Oxide

A Novel Method to Fabricate Nitrogen and Oxygen Co‐Doped Flexible Cotton‐Based Electrode for Wearable Supercapacitors

Tuning Nitrogen Species in Two‐Dimensional Carbon through Pore Structure Change for High Supercapacitor Performance

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Facile Synthesis of Single‐ and Multi‐Layer Graphene/Mn3O4 Integrated 3D Urchin‐Shaped Hybrid Composite Electrodes by Core‐Shell Electrospinning

Cited by 17 publications

References 33 publications

Improving the Co-removal Efficiency of Dyes from Water by a Novel Four-Component Chitosan Flexible Film Containing Graphene Oxide

Improving the Co-removal Efficiency of Dyes from Water by a Novel Four-Component Chitosan Flexible Film Containing Graphene Oxide

A Novel Method to Fabricate Nitrogen and Oxygen Co‐Doped Flexible Cotton‐Based Electrode for Wearable Supercapacitors

Tuning Nitrogen Species in Two‐Dimensional Carbon through Pore Structure Change for High Supercapacitor Performance

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Facile Synthesis of Single‐ and Multi‐Layer Graphene/Mn₃O₄ Integrated 3D Urchin‐Shaped Hybrid Composite Electrodes by Core‐Shell Electrospinning