Synthesis of Carbon Nanotubes on a Shungite Substrate and Their Use for Lithium–Sulfur Batteries

Temirgaliyeva, T. S.; Нажипкызы, М.; Nurgain, А.; Mansurov, Z. A.; Bakenov, Zh.

doi:10.1007/s10891-018-1861-5

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…The general scheme of the setup for the synthesis of CNT by the method of catalytic decomposition of hydrocarbon vapors is shown in Figure 1 [ 21 ].…”

Section: Methodsmentioning

confidence: 99%

The Use of Diatomite as a Catalyst Carrier for the Synthesis of Carbon Nanotubes

et al. 2022

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In this article, multiwalled carbon nanotubes (MWCNTs) have been synthesized on the surface of a diatomite mineral impregnated with transition metal salts using a propane-butane mixture in a chemical vapor deposition reactor at atmospheric pressure. The catalyst concentration and synthesis temperature have been varied in order to understand their effects on the formation of MWCNTs and their morphology. Diatomite was chosen as a catalyst carrier due to its elemental composition. It is mainly composed of amorphous silica, quartz and also contains such metals as Fe, K, Ca, Mn, Cr, Ti, and Zn, which makes it a promising material for use as a catalyst carrier when synthesizing carbon nanotubes (CNTs) by catalytic chemical vapor deposition (C-CVD). For the synthesis of carbon nanotubes by C-CVD on the surface of the diatomite, the following salts were used as a catalyst: CoCl2·6H2O; Ni(NO3)2·6H2O, and the concentrations of the solutions were 0.5; 1.0 and 1.5 M. Natural diatomite was characterized by X-ray diffraction analysis (XRD) and Scanning Electron Microscopy (SEM) analysis.

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“…The general scheme of the setup for the synthesis of CNT by the method of catalytic decomposition of hydrocarbon vapors is shown in Figure 1 [ 21 ].…”

Section: Methodsmentioning

confidence: 99%

The Use of Diatomite as a Catalyst Carrier for the Synthesis of Carbon Nanotubes

et al. 2022

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“…Carbon nanotubes were synthesized using catalytic chemical vapor deposition method. The typical schematic of the CCVD apparatus is given in [10]. Propane-butane mixture used as a carbon-containing gas, and diatomite was applied as a catalyst carrier.…”

Section: Methodsmentioning

confidence: 99%

Raman Characteristics of Multiwall Carbon Nanotubes on Diatomite

Нажипкызы¹,

Nurgain

Zhaparova

et al. 2018

Eurasian Chem. Tech. J.

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In this paper, the diatomite mineral from Mugalzhar field, Aktobe region, has been used as a matrix of catalyst particles to synthesize multiwall carbon nanotubes (MWCNTs) by Catalytic Chemical Vapor Deposition method (CCVD). As a source of carbon was used a propane-butane gas mixture, as a catalyst – Ni particles deposited from Ni(NO3)2 solution during heat treatment process at 400–500 °C. The CCVD method was conducted at a different temperature: 650 °C, 700 °C, 750 °C, 800 °C. Obtained MWCNTs were studied by Raman spectroscopy. The characteristics such as crystallinity, defectiveness, diameter of MWCNTs synthesized at different experimental conditions were evaluated from the positions and intensity ratios of Raman peaks of the samples. The results of investigations of the properties of the obtained carbon nanotubes show the dependence of MWCNTs characteristics on CCVD method temperature. The observation of changes in all the three peaks – D, G and 2D, of obtained materials exhibit, that MWCNTs synthesized at 800 °C possess high crystallinity, low defectiveness and larger diameters as compared with carbon nanotubes grown at 650 °C, 700 °C, 750 °C.

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“…Diatomite with carbon nanotubes (Diatomite/ CNT) (sample 2). Carbon nanotubes were synthesized by chemical catalytic vapor deposition, described in [22]. The growth process was carried out by catalytic decomposition of a propane-butane gas mixture on a diatomite substrate with a pre-prepared catalyst.…”

Section: Synthesismentioning

confidence: 99%

Электродные Материалы На Основе Диатомита Для Литий-Ионных Аккумуляторов

Assylkhanova

Нажипкызы

Maltay

et al. 2022

Горение и Плазмохимия

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Energy is a fascinating field that has been developing rapidly for many years. Various articles about alternative energy sources, batteries, and supercapacitors are being published today. This article is about the lithium-ion battery. The batteries come with three specific parts, one of which is the anode. In this area, electrons accumulate, which provide power to electrical devices. Since 2011, graphite anodes have been most commonly used in lithium batteries. Silicon is a tempting proposition for scientists working on next-generation lithium batteries with the potential to hold many times more energy than graphite. Silicon is a promising material for the anodes of lithium-ion batteries of a new generation since, in the process of electrochemical introduction, it can accumulate a large amount of lithium (up to 4.4 Li atoms per Si atom) and provide very high values of specific capacity (4200 mAh/g). The present article overviews the prospects for using diatomaceous earth (DE) (from the Mugalzhar region) in the continuous expansion of energy science and technology. Environmentally friendly silicon dioxide and silicon production, diatomaceous earth has the necessary nano-microstructure, which offers the advantages inherent in existing and new applications in electrochemistry, catalysis, optoelectronics, and biomedical engineering. Silicon, silicon, and silicon-based materials are useful for energy storage and storage applications. Also, for comparison, the surface of the DE was modified with nanotubes. The electrode material has been characterized by EDAX, SEM, BET, and electrochemical techniquesс. The results obtained showed the advantage of modified diatomite (specific surface area – 188.9 m2/g and particular capacity of the battery – 120 mA⋅h⋅g–1) compared to unmodified (specific surface area – 39.1 m2/g and a particular degree of the battery – 100 mA⋅h⋅g –1).

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Synthesis of Carbon Nanotubes on a Shungite Substrate and Their Use for Lithium–Sulfur Batteries

Cited by 7 publications

References 4 publications

The Use of Diatomite as a Catalyst Carrier for the Synthesis of Carbon Nanotubes

The Use of Diatomite as a Catalyst Carrier for the Synthesis of Carbon Nanotubes

Raman Characteristics of Multiwall Carbon Nanotubes on Diatomite

Электродные Материалы На Основе Диатомита Для Литий-Ионных Аккумуляторов

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