Effect of microwave treatment exposure time on functionalization and purification of multi-walled carbon nanotubes (MWCNTs)

Chopra, Swamini; Deshpande, Revati; Naik, Garima; Deshmukh, Kavita A.; Deshmukh, Abhay D.; Peshwe, D. R.

doi:10.1007/s00339-019-3159-7

Cited by 4 publications

(5 citation statements)

References 27 publications

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“…Figure 5a illustrates the full XPS spectrum, w clearly shows the presence of both carbon (C) and nitrogen (N) in Ru0.8@MLC. The p ence of these elements indicates the successful integration of ruthenium into the cata [58][59][60][61]. As demonstrated in Figure 5c, distinc ting peaks are observed for graphite nitrogen, pyrrole nitrogen and pyridine nitroge 401.5 eV, 399.7 eV and 397.9 eV, respectively.…”

Section: Resultsmentioning

confidence: 84%

“…As shown in the figure, the fitted peaks corresponding to C-O and C=O are observed at binding energies of 286.4 eV and 288.5 eV, respectively. The peaks centered at 282.7 eV and 286.1 eV correspond to Ru 3d 3/2 and Ru x+ 3d 3/2 , whereas the peaks at 280.6 eV and 281.8 eV correspond to Ru 3d 5/2 and Ru x+ 3d 5/2 , respectively [58][59][60][61]. As demonstrated in Figure 5c, distinct fitting peaks are observed for graphite nitrogen, pyrrole nitrogen and pyridine nitrogen at 401.5 eV, 399.7 eV and 397.9 eV, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Preparation of a High-Performance Catalyst Derived from Modified Lignin Carbon for the Hydrogen Evolution Reaction of Electrolyzed Water

Wang,

Qin,

Tang

et al. 2023

Catalysts

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Hydrogen energy is a plentiful and environmentally friendly form of secondary energy that could play a crucial role in achieving global energy sustainability. At the same time, the electrolysis of water for hydrogen production is a significant future-oriented advancement in the energy sector, whereas appropriate hydrogen evolution catalysts have always been the key to hydrogen evolution reactions. In this study, lignin was utilized as an appropriate raw material for modification in order to obtain carbon materials, which was then supported with Ru to prepare an Ru0.8@MLC catalyst. At a current density of 10 mA cm−2, the required overpotential was a mere 35.6 mV and the slope of Tafel was 31.7 mV dec−1. This study provides a feasible strategy and pathway for preparing highly efficient electrocatalysts for the hydrogen evolution reaction.

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 99%

Preparation of a High-Performance Catalyst Derived from Modified Lignin Carbon for the Hydrogen Evolution Reaction of Electrolyzed Water

Wang,

Qin,

Tang

et al. 2023

Catalysts

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“…The features of the microwave technique are easy11 and rapid processing, enhanced reaction kinetics, less acid intake, enhanced reaction kinetics, rise temperature with high product and negligible structural harm. Most of the previous experiments concerned on the functionalized MWCNTs by a microwave method at high pressure via laboratory microwave systems [25,26]. In this study, a one-step procedure has been revealed for the first time in this work by using an amended commercial microwave for functionalized MWCNTs under atmospheric pressure.…”

Section: Introductionmentioning

confidence: 83%

Functionalization of Multi-Walled Carbon Nanotubes Using Microwave Method

Alosfur

Ridha

Jumali

et al. 2021

MSF

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Multi-walled carbon nanotubes (MWCNTs) probably hold with each other and agglomerated due to van der Waals force. Functionalized process was used to reduce its ability to agglomerate and to increase dispersion in solution. The present work is focused on the microwave irradiation in order to achieve rapid functionalization of MWCNTs compared with other known techniques. The power of microwave radiation was selected by investigating the structural integrity of the samples by X-ray diffraction (XRD) and Field Emission Scanning Electron Microscopy (FE-SEM), while BET surface area measurement was used to measure the MWCNT surface area before and after treatment. The dispersion test in the solution was performed to determine the separation capability of untreated MWCNTs and f-MWCNTs.

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“…Microwave radiations are alternatively used for the surface modification of filler materials in acidic solutions in order to save time and energy as compared to conventional sonication or refluxing route. [ 13,14 ] Such microwave‐treated fillers are then incorporated into polymer matrix for making composites. [ 15,16 ] Chopra et al [ 14 ] attempted functionalization of multi‐walled carbon nanotubes (MWCNTs) in a solution of sulfuric acid (H 2 SO 4 ) and nitric acid (HNO 3 ) by exposing the mixture to microwave radiations.…”

Section: Introductionmentioning

confidence: 99%

“…[ 13,14 ] Such microwave‐treated fillers are then incorporated into polymer matrix for making composites. [ 15,16 ] Chopra et al [ 14 ] attempted functionalization of multi‐walled carbon nanotubes (MWCNTs) in a solution of sulfuric acid (H 2 SO 4 ) and nitric acid (HNO 3 ) by exposing the mixture to microwave radiations. This process was reported to be time‐saving and more efficient than conventional ultrasonication process.…”

Section: Introductionmentioning

confidence: 99%

A new approach of microwave treatment to augment the mechanical properties of polymeric materials

Chopra¹,

Pande

Tupe³

et al. 2021

Polymer Engineering & Sci

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The present study portrays a novel post‐processing treatment by using microwave radiations for enhancing mechanical properties of five commonly used engineering polymers, polyamide (PA), polybutylene terephthalate (PBT), polypropylene (PP), polycarbonate (PC), and acrylonitrile‐butadiene‐styrene (ABS). The analysis revealed that the crystal structures of the polymers improved after the treatment due to more favorable rearrangement of crystalline segments within the polymers. Furthermore, tensile properties and tribological performance of microwave‐treated polymers were found to be significantly better when compared to those of untreated counterparts. The tensile strength, elongation, and wear performance of PA increased by 51%, 286%, and 45%, respectively, only after a treatment of 20 s. A similar response was also exhibited by other polymers as well. It was noted that optimum time for microwave treatment can vary depending on different crystalline nature of the polymers. The degree of randomness in the molecular chains of semicrystalline polymers is less; thus, it requires less treatment time. However, for amorphous polymers, as randomness increases, more time is needed. As such, post‐processing microwave treatment of polymers has proven beneficial as a cost‐effective, time‐saving, and environment‐friendly technique for enhancing material properties significantly.

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Effect of microwave treatment exposure time on functionalization and purification of multi-walled carbon nanotubes (MWCNTs)

Cited by 4 publications

References 27 publications

Preparation of a High-Performance Catalyst Derived from Modified Lignin Carbon for the Hydrogen Evolution Reaction of Electrolyzed Water

Preparation of a High-Performance Catalyst Derived from Modified Lignin Carbon for the Hydrogen Evolution Reaction of Electrolyzed Water

Functionalization of Multi-Walled Carbon Nanotubes Using Microwave Method

A new approach of microwave treatment to augment the mechanical properties of polymeric materials

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