Divulging the electrochemical hydrogen storage on nitrogen doped graphene and its superior capacitive performance

Gunasekaran, Sivagaami Sundari; Kumaresan, Thileep Kumar; Masilamani, Shanmugaraj Andikkadu; Karazhanov, Smagul; Raman, K.; Raghu, S.

doi:10.1016/j.matlet.2020.127919

Cited by 30 publications

(8 citation statements)

References 14 publications

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“…The hydrochars exhibit peaks indicating the presence of CC alkenes (1600 cm –1 ) when produced at 240 °C, revealing the increased aromatization at higher temperatures which is consistent with the increased carbon content and thermal stability that was experienced for these samples . C–H stretching (1450 cm –1 ) corresponding to alkanes, and C–O stretching or O–H bending vibrations (1000-1470 cm –1 ) corresponding the ether, ester, carbonyl, or carboxyl functional groups were also observed for the hydrochars. , Due to the use of GO and the high nitrogen content in the CF which is sustained in the hydrochar, it is also possible that the graphene structures could have become functionalized with nitrogen, as a new peak is formed at 1100 cm –1 which corresponds to C–N stretching vibrations in amine groups. , …”

Section: Resultssupporting

confidence: 58%

“…2,29 Due to the use of GO and the high nitrogen content in the CF which is sustained in the hydrochar, it is also possible that the graphene structures could have become functionalized with nitrogen, as a new peak is formed at 1100 cm −1 which corresponds to C−N stretching vibrations in amine groups. 34,35 To further investigate the functional groups present on the hydrochar surfaces, XPS analysis was performed. Fig.…”

Section: Go-assisted Hydrochars Chemical Composition and Morphologymentioning

confidence: 99%

“…The addition of GO may have also facilitated the incorporation of nitrogen into the carbon structure which has been suggested by other studies. 23,35,46 The mechanisms proposed for enhancing nitrogen-doping through HTC with GO are explained in the study conducted by Fan et al, 46 and involve the reaction of oxygen functional groups on the GO surface with released volatile nitrogen compounds under hydrothermal conditions. Formed nitrogen intermediates will then further undergo dehydration and decarbonylation, ultimately leading to the formation of more stable pyridinic, amine, and pyrrolic nitrogen species.…”

Section: Go-assisted Hydrochars Chemical Composition and Morphologymentioning

confidence: 99%

See 2 more Smart Citations

High Surface Area Microporous Activated Carbon from Corn Fiber Using Graphene Oxide-Assisted Hydrothermal Carbonization

Ubene,

MacDermid-Watts,

Dutta

et al. 2024

ACS Sustainable Resour. Manage.

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This study investigated a novel process that explored the use of graphene oxide (GO) as a catalyst in the hydrothermal carbonization (HTC) process of low-value, high moisture-containing corn fiber (CF) to analyze the morphology, surface area, and porosity characteristics of activated carbon (AC) derived from GO-assisted hydrochar. The SEM results showed significant alteration to the hydrochar morphology revealing carbon spheres with flakes or platelet-like structures when GO was added to the process, which led to increased carbonization and promoted the hydrochar surface area. The surface areas of the ACs produced from the hydrochars were further increased, and a well-developed porous structure was produced with significant micropore volume. The highest surface area of 2549.1 m 2 /g obtained for the AC derived from the hydrochar with the highest GO ratio. Despite the absence of a strong trend between the GO ratio and AC surface area, the SEM analysis and pore size results revealed that the ACs derived from the GO-assisted hydrochars had more intact structures and smaller micropores with interconnected pore channels which would be very favorable for hydrogen storage capacity. The nitrogen content in the ACs was also found to be comparable or higher than carbons from other studies using nitrogen doping steps and was detected in surface functional groups through FT-IR and XPS analysis. Overall, the developed process provides valuable insight into the influence of GO for tailoring porous carbon materials to enhance surface area and pore structure in low-cost and effective bio-based adsorbents, offering opportunities for emerging applications while promoting circular economy principles.

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Section: Resultssupporting

confidence: 58%

Section: Go-assisted Hydrochars Chemical Composition and Morphologymentioning

confidence: 99%

Section: Go-assisted Hydrochars Chemical Composition and Morphologymentioning

confidence: 99%

See 1 more Smart Citation

High Surface Area Microporous Activated Carbon from Corn Fiber Using Graphene Oxide-Assisted Hydrothermal Carbonization

Ubene,

MacDermid-Watts,

Dutta

et al. 2024

ACS Sustainable Resour. Manage.

View full text Add to dashboard Cite

show abstract

“…Multilayer graphene had a highly ordered structure, having functional advantages of single-layer graphene, while avoiding the shortcomings of poorly stable single-layer graphene . All these factors had contributed to the research of functionally grafted multilayer graphene, with functional groups such as −OH, −NH 2 , −F, and −N 2 . − Qiu et al prepared nanocomposites of isotactic polypropylene (iPP)/graphene sheets. Their results revealed that graphene sheets had good dispersibility and strong interfacial adhesion with iPP, and these provided the nanocomposite with significant thermal stability and mechanical properties at low loading of graphene sheets.…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties and Barrier Performance of Antibacterial High-Density Polyethylene Reinforced with Carboxyl Graphene-Grafted Modified High-Density Polyethylene

Tsou

Yao

et al. 2021

Ind. Eng. Chem. Res.

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In this study, carboxyl graphene-grafted modified high-density polyethylene (CG-g-MHDPE), a new nano-material prepared from grafting MHDPE with CG, was combined with high-density polyethylene (HDPE) through melt-mixing to prepare HDPE/CG-g-MHDPE nanocomposites (with different proportions of HDPE and CG-g-MHDPE). It is hoped that the new nano-material could reduce the occurrence of graphene agglomeration in nonpolar substrates. Fourier-transform infrared spectroscopy showed that CG-g-MHDPE was successfully synthesized. The results from microscopic characterization, mechanical performance test, thermal analysis, and barrier-property evaluation indicated that the mechanical properties, crystallinity, thermal properties, and barrier properties of HDPE/CG-g-MHDPE nanocomposites with a low content of CG-g-MHDPE (4 and 8%) were greatly improved compared with those of pure HDPE, and the compatibility between graphene and HDPE was effectively enhanced. With increasing added amount of CG-g-MHDPE, the overall performance of the nanocomposites decreased significantly. Adding 8% CG-g-MHDPE led to the production of a nanocomposite with the best performance. Reinforced HDPE nanocomposites with better performance would have a wider range of applications.

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“…Nowadays, two‐dimensional nanomaterials have attracted enormous attention in academia and industry. Graphene is one of the most promising two‐dimensional nanomaterials, which have devoted to develop many potential applications such as advanced composites, 1 high‐capacity batteries, 2 flame retardancy, 3 energy conversion and storage, 4 owing to its high surface area, extraordinary physical properties, and outstanding electron charge transport properties 5 …”

Section: Introductionmentioning

confidence: 99%

An efficient and eco‐friendly route to prepare graphene nanosheet and its effect on the flammability of polypropylene composites

Tang

Wang

Yang

et al. 2021

Polymers for Advanced Techs

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A rapid, green, and cost‐effective route for the preparation of graphene nanosheets (GRNs) from their layered bulks by the ultrasonic together with mechanical grinding was reported. The whole exfoliation process of synthesizing GRNs lasted just 2 hours without involvement of any acid solvent or other organic solvents; only one kind of waste biomass as adhesive could be used. The structure and morphology of GRNs were characterized and then was then introduced into polypropylene by melt blending, and the cone calorimetry test results indicated that the presence of GRNs could enhance the flame retardancy of PP composite.

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Divulging the electrochemical hydrogen storage on nitrogen doped graphene and its superior capacitive performance

Cited by 30 publications

References 14 publications

High Surface Area Microporous Activated Carbon from Corn Fiber Using Graphene Oxide-Assisted Hydrothermal Carbonization

High Surface Area Microporous Activated Carbon from Corn Fiber Using Graphene Oxide-Assisted Hydrothermal Carbonization

Thermal Properties and Barrier Performance of Antibacterial High-Density Polyethylene Reinforced with Carboxyl Graphene-Grafted Modified High-Density Polyethylene

An efficient and eco‐friendly route to prepare graphene nanosheet and its effect on the flammability of polypropylene composites

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