A comprehensive review on carbon nano-tube synthesis using chemical vapor deposition

Pant, Manish; Singh, Rahul; Negi, Prateek; Tiwari, Kritika; Singh, Yashvir

doi:10.1016/j.matpr.2021.02.646

Cited by 25 publications

(7 citation statements)

References 33 publications

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“…N -doping can be achieved by introducing nitrogen atoms into the carbon lattice, either during the synthesis process or through a post-synthesis treatment [ 54 , 55 ]. The incorporation of N heteroatoms during the production process includes high-temperature arc discharge [ 56 , 57 ], chemical vapor deposition (CVD) [ 58 ], and solvothermal procedures [ 59 ].…”

Section: N -Doped Porous Carbons: Precursors and Synthesis S...mentioning

confidence: 99%

New Insights into N-Doped Porous Carbons as Both Heterogeneous Catalysts and Catalyst Supports: Opportunities for the Catalytic Synthesis of Valuable Compounds

et al. 2023

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Among the vast class of porous carbon materials, N-doped porous carbons have emerged as promising materials in catalysis due to their unique properties. The introduction of nitrogen into the carbonaceous matrix can lead to the creation of new sites on the carbon surface, often associated with pyridinic or pyrrolic nitrogen functionalities, which can facilitate various catalytic reactions with increased selectivity. Furthermore, the presence of N dopants exerts a significant influence on the properties of the supported metal or metal oxide nanoparticles, including the metal dispersion, interactions between the metal and support, and stability of the metal nanoparticles. These effects play a crucial role in enhancing the catalytic performance of the N-doped carbon-supported catalysts. Thus, N-doped carbons and metals supported on N-doped carbons have been revealed to be interesting heterogeneous catalysts for relevant synthesis processes of valuable compounds. This review presents a concise overview of various methods employed to produce N-doped porous carbons with distinct structures, starting from diverse precursors, and showcases their potential in various catalytic processes, particularly in fine chemical synthesis.

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Section: N -Doped Porous Carbons: Precursors and Synthesis S...mentioning

confidence: 99%

New Insights into N-Doped Porous Carbons as Both Heterogeneous Catalysts and Catalyst Supports: Opportunities for the Catalytic Synthesis of Valuable Compounds

et al. 2023

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“…Preparing MWCNTs is a complex process. Chemical vapor deposition, ,, arc discharge, − and laser ablation − are widely used preparation methods of MWCNTs. These methods facilitate the controlled growth of application-specific MWCNTs, but each has its advantages and limitations.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonics-Aided Dispersion of 1D Nanocarbons in Lubricating Oils For Enhanced Lubrication

Ravikiran,

Padya,

Jain

et al. 2024

Ind. Eng. Chem. Res.

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This work reports ultrasonics-aided dispersion of onedimensional (1D) multiwalled carbon nanotubes (MWCNTs) in an additive-free mineral base oil (BO) (group-2 dewaxed N500) and a commercial synthetic engine oil (CO) (ENI TriStar 15W40) to improve the oils' friction and wear-preventive properties. The lubricant additives, i.e., the MWCNTs, were prepared using a customized vertical fluidized bed reactor. The MWCNTs improved the BO's friction and wear-preventive properties and functioned synergistically with the predispersed additives in CO. Dispersing 0.1 wt % of the MWCNTs in BO improved the latter's antifriction property by 64%, and dispersing 0.1 wt % of MWCNTs in CO resulted in the reduction of the coefficient of friction (CoF) by 48%. The wear-preventive properties of the BO and CO improved by 60% and 30%, respectively, because of the addition of 0.1 wt % of MWCNTs. This work also clarifies the processes that improve lubrication performance, thereby decreasing friction and wear. This study advances the practical use of ultrasonication in process intensification in preparing stable 1D nanocarbon-additive lubricants with enhanced lubricating properties.

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“…The significance of this approach is to overcome the shortcomings of the randomly distributed CNTs on the bare electrode surface as well as providing good contact in between [ 20 ]. Among the commonly used techniques for producing CNTs, catalytic chemical vapor deposition (CCVD) is the preferred route for quite pure CNTs as compared to the other two techniques: arc discharge and laser ablation methods [ 21 , 22 ]. CCVD is a simple and cost-effective approach for producing CNTs with a more controlled architecture at ambient pressure and relatively lower temperatures [ 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Multiwalled Carbon Nanotubes-Modified Metallic Electrode Prepared Using Chemical Vapor Deposition as Sequential Injection Analysis Detector for Determination of Ascorbic Acid

2023

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A carbon nanotubes modified silver electrode (CNTs-Ag) was prepared via catalytic chemical vapor deposition and characterized. The morphology, crystallinity, elemental composition, and other quality parameters of the prepared electrode were investigated using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman techniques. The characterization results revealed the modification of the silver metal surface with CNTs of good characteristics. A sequential injection analysis (SIA) system was developed for studying the reaction of ascorbic acid with KIO3 using the prepared CNTs-Ag electrode. Electrodes were polarized with both direct current (DC) and periodic square wave (SW). Various experimental conditions affecting the differential electrolytic potentiometric (DEP) peak such as current density, SW bias value, and flow rate were appraised. Under the optimum conditions, good linear responses for ascorbic acid were obtained in the range of 60.0–850.0 µM for both types of polarization with detection limits of 14.0–19.0 µM. The results obtained showed that the periodic polarization method was more sensitive than DC polarization and the electrode response was faster. Ascorbic acid in pharmaceutical tablets was determined with satisfactory results using this method. The prepared CNTs-based electrode exhibited good performance for a long period of use. The method is simple, rapid, and inexpensive for routine analysis.

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A comprehensive review on carbon nano-tube synthesis using chemical vapor deposition

Cited by 25 publications

References 33 publications

New Insights into N-Doped Porous Carbons as Both Heterogeneous Catalysts and Catalyst Supports: Opportunities for the Catalytic Synthesis of Valuable Compounds

New Insights into N-Doped Porous Carbons as Both Heterogeneous Catalysts and Catalyst Supports: Opportunities for the Catalytic Synthesis of Valuable Compounds

Ultrasonics-Aided Dispersion of 1D Nanocarbons in Lubricating Oils For Enhanced Lubrication

Multiwalled Carbon Nanotubes-Modified Metallic Electrode Prepared Using Chemical Vapor Deposition as Sequential Injection Analysis Detector for Determination of Ascorbic Acid

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