Improving electrochemical performance of reduced graphene oxide by counteracting its aggregation through intercalation of nanoparticles

Jeyasubramanian, K.; Muthuselvi, M.; Muthusankar, E.

doi:10.1016/j.jcis.2019.04.046

Cited by 11 publications

(7 citation statements)

References 36 publications

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“…The FWHM values of 3 wt% Y‐rGO, 5 wt% Y‐rGO, and 10 wt% Y‐rGO are 0.4419°, 0.5449°, and 0.6309°, respectively. This fact is owing to the intercalation process, where the Y 2 O 3 NPs inhibit the re‐stacking phenomenon of rGO sheets, which effectively reduces its active surface area 30 . Therefore, from the XRD pattern, it is clear that Y 2 O 3 NPs enhances the active surface area of rGO in all the composites.…”

Section: Resultsmentioning

confidence: 97%

“…rGONSs is prepared by following the procedure depicted in our previous work, where oxidation and reduction process occurred to obtain exfoliated rGO by microwave treatment. 30 At first, the graphite (precursor of rGO) is washed by suspending in an adequate amount of distilled water and treated with ultrasonication process. The washed graphite is separated from the mixture and collected in a fresh beaker.…”

Section: Preparation Of Reduced Graphene Oxide Nanosheets (Rgonss)mentioning

confidence: 99%

“…NPs inhibit the re-stacking phenomenon of rGO sheets, which effectively reduces its active surface area 30. Therefore, from the XRD pattern, it is clear that Y 2 O 3 NPs enhances the active surface area of rGO in all the composites.…”

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confidence: 96%

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Rare earth metal oxide‐doped reduced graphene‐oxide nanocomposite as binder‐free hybrid electrode material for supercapacitor application

Muthuselvi¹,

Jeyasubramanian²,

Hikku

et al. 2021

Int J Energy Res

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In this study, rare earth metal-oxide (yttrium oxide nanoparticles, Y 2 O 3 NPs) doped reduced graphene oxide nanosheets (rGONSs) nanocomposites (Y-rGO) were prepared and applied as hybrid electrode materials to evaluate the supercapacitor performances. For comparative analysis, various ratios of Y 2 O 3 NPs doped rGONSs nanocomposites were prepared by dispersing different amounts (3,5, and 10 wt%) of Y 2 O 3 NPs in the aqueous rGONSs dispersion under facile ultrasonication process. As prepared Y-rGO nanocomposites were characterized towards its physicochemical and electrochemical properties using powder X-ray diffraction, Fourier-transform infrared spectroscopy, field-emission scanning electron microscopy, X-ray photoelectron spectroscopy, and electrochemical analysis such as cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge-discharge (GCD) analysis. Electrochemical studies reveal that 5 wt% Y-rGO displays improved supercapacitor performance with a high specific capacitance of 190 Fg −1 at 10 mVs −1 and also exhibits excellent cyclic retention of 88% due to the intercalation of rGO and less contact resistance facilitated by Y 2 O 3 NPs when compared with 3 wt% Y-rGO and 10 wt% Y-rGO nanocomposites. Further, 5 wt% Y-rGO display a very low charge-transfer resistance of 0.001 Ω, suggesting its commercial viability for energy storage devices.

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Section: Resultsmentioning

confidence: 97%

Section: Preparation Of Reduced Graphene Oxide Nanosheets (Rgonss)mentioning

confidence: 99%

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Rare earth metal oxide‐doped reduced graphene‐oxide nanocomposite as binder‐free hybrid electrode material for supercapacitor application

Muthuselvi¹,

Jeyasubramanian²,

Hikku

et al. 2021

Int J Energy Res

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“…The existence of hierarchical porosity in the biochar may host the active SnO 2 nano particles that may facilitate higher specific capacitance due to improved conductivity of the catalyst [29] . Further, the tin oxide nanoparticle owing to its enhanced surface area and porous nature, promotes the biomass degradation by offering supplementary active sites for better interaction between the catalyst and the feed stock [27] . The pore size distribution of the SnO 2 nano particles is evaluated with the aid of BJH plot and depicted in Figure 7b.…”

Section: Resultsmentioning

confidence: 99%

Pyrolysis of Corn Husk Enabled with Tin Oxide Nano Particles: Kinetic Studies and Biochar as Electrode Material

Prabhahar,

Vasiraja,

Manohara Babu

et al. 2024

ChemistrySelect

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Handling of agricultural residues is a major concern today, since they pose a serious threat to the environment. Pyrolysis is one among the different techniques explored across the globe towards the effective conversion of these crop residues into various useful products. In this work, the degradation behaviour of corn husk loaded with tin oxide nanoparticles and raw corn husk are characterized separately by employing thermogravimetric analyzer (TGA). From the thermograms obtained, the energy required for facilitating the degradation process with the aid of the catalyst is found to be 98.48 kJ/mol. Further, the corn husk loaded with prepared tin oxide nanoparticles (0.1 g& 0.2 g) is subjected to pyrolytic degradation at different temperature ranges from 400 °C to 550 °C and compared with thermal pyrolysis. The biochar retained from the pyrolysis process is investigated for its efficacy as an energy storage material after coating them over graphite sheet. Electrochemical analysis reveals the fabricated SnO2/biochar nanocomposite have excellent energy storage characteristics (205 F/g at a scan rate of 10 mV/s) which was attributed to the presence of facile architecture with porous surface area. The outcomes of the present study open fresh gateways for the innovative electrodes in energy domain.

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“…Graphene oxides have many applications due to their excellent electrical properties [68,69]. A single layer of graphene sheet with a regulated pore size of 10 nm can provide water permeability up to 35±5 L m −2 h −1 bar −1 [70].…”

Section: Graphene Membranesmentioning

confidence: 99%

Desalination and Non-potable Water Remediation Using Nanotechnology Based Membranes - A Review

Govindharaj,

Girigoswami,

Girigoswami

2023

Curr. Appl. Sci. Technol.

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Potable water plays its role in many fields, including agriculture, energy production, and industries, which increases the demand for potable water in society. In order to meet the need for clean drinking water, desalination and purification play a leading role. When desalination is mentioned, the subject of membrane technology often covers its attention, and in this review, we have discussed membrane-based desalination. Advances in nanotechnology and membrane engineering have provided a new platform for enhanced performance in membrane filtration. The hybrid membranes made from a combination of different nanostructures have yielded high precision and durable membranes which are cost- effective. The membranes that incorporate in nanotechnology cannot only remove very small particles from contaminated water, but also remove sulfate, phosphate, magnesium, and calcium- dissolved compounds with multivalent ions. The nanomembranes are more energy efficient also. The different nano-scale materials used in membrane preparation along with their performance have been discussed. The peaks and valleys of the development of nanomaterials for desalination purpose provide a clear view of the upcoming era of membrane desalination.

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Improving electrochemical performance of reduced graphene oxide by counteracting its aggregation through intercalation of nanoparticles

Cited by 11 publications

References 36 publications

Rare earth metal oxide‐doped reduced graphene‐oxide nanocomposite as binder‐free hybrid electrode material for supercapacitor application

Rare earth metal oxide‐doped reduced graphene‐oxide nanocomposite as binder‐free hybrid electrode material for supercapacitor application

Pyrolysis of Corn Husk Enabled with Tin Oxide Nano Particles: Kinetic Studies and Biochar as Electrode Material

Desalination and Non-potable Water Remediation Using Nanotechnology Based Membranes - A Review

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