Ultrafast growth of carbon nanotubes using microwave irradiation: characterization and its potential applications

Baghel, Paramjeet; Sakhiya, Anil Kumar; Kaushal, Priyanka

doi:10.1016/j.heliyon.2022.e10943

Cited by 20 publications

(4 citation statements)

References 161 publications

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“…The figure shows that the bandgap of the ball-milled biochar decreased with the increase in the pyrolysis time at 300 °C. A decrease in the Eg occurred as a consequence of the hybridisation of the σ and π orbitals, which invariably indicated an increase in the hydrodynamic diameter of the samples [66]. The reduction in bandgap improves the response of ballmilled biochar to visible light, increases the electron-hole separation, produces vacant sites, improves the lifetime of photogenerated carriers, and inhibits photogenerated electron-hole recombination [22,67].…”

Section: Optical Analysismentioning

confidence: 98%

Preparation and characterisation of graphitic biochar materials derived from rose oil industry waste via different pyrolysis durations and ball milling for advanced composites

Alluqmani,

Albaqawi,

Hakami

et al. 2024

Mater. Res. Express

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The valorisation of waste from rose-based industrial products produces value-added substances and paves the way for advanced composites. The rose waste generated from the essential oil industry of the Taif rose (Rosa damascena trigintipetala Dieck) is significant, and its management or disposal is a source of concern. In this study, it was valorised to produce a value-added nanomaterial. The synthesis of biochar nanoparticles via high-energy ball milling has gained tremendous research interest in recent times because of its low cost and eco-friendliness. Ball milling is a solvent-free technology with strong potential for waste volatilisation and eco-sustainability through the production of engineered biochar nanoparticles. Different biochar samples were produced and characterised to harness the synergistic combination of biochar production and ball milling. They were prepared at a constant pyrolysis temperature of 300oC by varying the pyrolysis times for 2 h, 5 h, and 10 h. The characterisation results showed that pyrolysis confirms a high content of carbon, minerals, graphitic structure, novel morphology and chemical characteristics attached to the biochar surface controlled by different pyrolysis durations. These properties were further enhanced by ball milling for 10 h. The results showed that ball milling enhanced the porosity, surface area, surface functional groups, visible light absorption, crystallinity, and carbon content, and these were accompanied by a reduction in the particle size and mineral impurities. The engineered biochar can be an important tool, with promising potential in novel composites for water purification and energy harvesting.

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Section: Optical Analysismentioning

confidence: 98%

Preparation and characterisation of graphitic biochar materials derived from rose oil industry waste via different pyrolysis durations and ball milling for advanced composites

Alluqmani,

Albaqawi,

Hakami

et al. 2024

Mater. Res. Express

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“…CNTs (1D nanocarbon) may now be easily grown using microwave radiation, opening up a new method for their versatile and economical synthesis. Both domestic and commercial microwave ovens have been utilized as practical plasma reactors for the quick, easy, energy-efficient, and solvent-free growth of CNTs (Jašek et al, 2006;Baghel et al, 2022). In addition to enabling the rapid growth of high-density CNTs in a matter of seconds, the unique heating mechanism of microwaves also eliminates the requirement for an expensive boiler and a source of combustible gaseous carbon (Liu et al, 2019).…”

Section: Cnts and Doped Cntsmentioning

confidence: 99%

“…Microwaveassisted synthesis of carbon-based nanomaterials requires low growth temperatures and offers high surface areas, adsorption capacities, and purity while providing energy savings. As such, it presents a promising approach to addressing the challenges for industrial and municipal water treatment (Schwenke et al, 2015;Baghel et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted synthesis of carbon-based nanomaterials from biobased resources for water treatment applications: emerging trends and prospects

2023

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Carbon-based nanomaterials have drawn significant interest as desirable nanomaterials and composites for the adsorptive removal of various classes of pollutants from water owing to their versatile physicochemical properties. The underlying sorption mechanisms serve as the bedrock for the development of carbonaceous adsorbents for various target pollutants. Microwave-assisted synthesis can be regarded as a recent and well-advanced technique for the development of carbon-based nanomaterials, and the use of biobased materials/wastes/residues conforms with the concept of green and sustainable chemistry. For advancements in carbon-based functional nanomaterials and their industrial/field applications, it is essential to fully comprehend the sorption performance and the selective/non-selective interaction processes between the contaminants and sorbents. In this regard, research on the development of carbon-based nanomaterials for the adsorption of chemical contaminants, both organic and inorganic, in water has made considerable strides as discussed in this review. However, there are still several fundamental hurdles associated with microwave-assisted chemical synthesis and commercial/industrial scale-up applications in nano-remediation. The challenges, benefits, and prospects for further research and development of carbon-based nanomaterials/nanocomposites for the purification of water are also discussed.

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“…For example, Li et al coated a carbon (C) layer on the surface of Si nanoparticles to resist their volume expansion, but the rigid C shell is easily damaged by the stress accumulated from the volume expansion during lithiation. To ensure conductivity while improving the flexibility of the buffer layer, research has focused on developing some flexible conductive substrates, such as graphene − and carbon nanotubes. − However, the preparation process of graphene and carbon nanotubes often requires harsh conditions or involves complex synthesis processes that add extra cost to the product. − Comparatively, MXene, as a novel transition metal carbide or nitride, combines the properties of graphene and graphene oxide with good electrical conductivity, surface chemistry, hydrophilicity, and excellent mechanical properties, which can be used as a good conductive substrate material. − Moreover, its preparation method by etching in LiF-dissolved HCl solution is simple and mild, and it is suitable for large-scale production and application. The general structural formula of MXene is M n +1 X n T x ( n = 1, 2 or 3), in which M represents the former transition metal element, X represents the carbon or/and nitrogen, and T x represents the surface functional group associated with the M layer, such as −F, −O, −OH, etc. , Among them, Ti 3 C 2 T x is the most representative of the MXenes family and has been applied as a conductive buffer substrate for silicon-based anodes.…”

Section: Introductionmentioning

confidence: 99%

Rigid-Flexible Coupling Modification Strategy Realized by Combining MXene with C-Coated Microsilicon for Long-Life Li-Ion Battery

Lin,

Liu,

Peng

et al. 2024

ACS Appl. Energy Mater.

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Compared with nanosilicon, microsilicon with high capacity is the best candidate for high-energy-density lithium-ion batteries due to its lower cost and fewer interfacial side reactions. However, particle cracking and even pulverization caused by the huge volume expansion and low ionic conductivity of microsilicon seriously hinder its large-scale application. Here, we prepared a rigid-flexible coupled modification layer for microsilicon flakes (Si) by using polydopamine (PDA) as a bridging agent and MXene (Ti 3 C 2 T x ) as a buffer layer. The hydrogen bonds between groups on PDA and the terminal groups (−OH, etc.) on Si and MXene surfaces can induce the uniform distribution of Si particles on the surface of the MXene, which inhibits the agglomeration of Si particles and the self-accumulation of MXene nanosheets. In addition, the rigid N-doped carbon (NC) layer derived from the high-temperature cracking of PDA coated on the Si surface and the flexible MXene buffer layer synergistically form a hierarchical multiplex conductive network, which not only accelerates the kinetics of the electrode during cycling and suppresses particle cracking but also effectively protects the electrode from the destruction of the decomposition byproducts. As a result, this NC-coated Si uniformly supported on MXene (Si@NC/MXene-2) delivers highly reversible specific capacities of 1066.1 mAh g −1 after 250 cycles at 0.5 A g −1 and 810.9 mAh g −1 after 650 cycles even at a higher current density of 1 A g −1 . This work provides valuable insights for the development of advanced silicon-based anode materials for application in high-energy-density lithium-ion batteries.

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Ultrafast growth of carbon nanotubes using microwave irradiation: characterization and its potential applications

Cited by 20 publications

References 161 publications

Preparation and characterisation of graphitic biochar materials derived from rose oil industry waste via different pyrolysis durations and ball milling for advanced composites

Preparation and characterisation of graphitic biochar materials derived from rose oil industry waste via different pyrolysis durations and ball milling for advanced composites

Microwave-assisted synthesis of carbon-based nanomaterials from biobased resources for water treatment applications: emerging trends and prospects

Rigid-Flexible Coupling Modification Strategy Realized by Combining MXene with C-Coated Microsilicon for Long-Life Li-Ion Battery

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