Synthesis and characterization of mesoporous TiC nanopowder/nanowhisker with low residual carbon processed by sol–gel method

Sharifi, Fahimeh; Mahmoodi, Zahra; Abbasi, Saloumeh Mesgari; Najafi, Abolhassan; Khalaj, Gholamreza

doi:10.1016/j.jmrt.2022.12.097

Cited by 31 publications

(7 citation statements)

References 43 publications

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“…Figure 2(c) shows the changes in sol particles size with pH. Figure 3 illustrates effect of APC on particles stability [18].…”

Section: Ph Optimizing In the Solmentioning

confidence: 99%

“…As a result, they cannot be easily prepared by conventional metallurgical techniques such as casting. They cannot also be sintered normally without the help of sinters [18,19]. In the last few decades, various techniques, including carbothermal reduction, self-propagating high-temperature synthesis, and chemical vapor deposition have been developed for the production of these materials.…”

Section: Introductionmentioning

confidence: 99%

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Exploring the impact of pH and temperature on TiC nanopowders syntesized via sol-gel and subsequent crystallization by carbothermal reduction method

Morshed,

Najafi,

Khalaj

2024

Phys. Scr.

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In the present study, titanium carbide powders with suitable morphology and nanometer particle size were synthesized by the sol-gel method to investigate the parameters affecting the properties of sol and the final powder. The initial sol was prepared in a four-component system of alkoxide-water-alcohol-citric acid based on the chemical process of sol-gel. study of sol properties showed that pH was the most important factor in the control of sol conditions and particle size so that at low pHs, due to low concentration of OH- ions and reduced viscosity, it was easier to control the particles size. Accordingly, the results of the Dynamics Light Scattering (DLS) showed that at low pHs, the particles size was below 10 nm. According to the zeta potential diagram and by examining the conditions of sol at different pHs, 4.5 was determined as the optimal pH and to prevent the bonding of particles within the sol, ammonium polycarboxylate dispersant was used. The temperature at which particles were formed was determined using Differential thermal analysis (DTA) and Thermal gravimetric analysis (TG). X-ray diffraction (XRD) patterns showed the presence of a completely amorphous phase at 700˚C. It was also observed that with increasing temperature, TiC crystallization started from 1200˚C and ended at 1400˚C. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) micrographs at 1400˚C showed the completely spherical morphology of particles of nanometer size so that no agglomerate was observed.

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“…Figure 2(c) shows the changes in sol particles size with pH. Figure 3 illustrates effect of APC on particles stability [18].…”

Section: Ph Optimizing In the Solmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exploring the impact of pH and temperature on TiC nanopowders syntesized via sol-gel and subsequent crystallization by carbothermal reduction method

Morshed,

Najafi,

Khalaj

2024

Phys. Scr.

Self Cite

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“…Titanium carbide can be produced by self-propagating high-temperature synthesis, 15 electrical explosion of conductors, 10 carbothermal reduction, 16,17 sol–gel infiltration, 18 vapor infiltration, 13 molten salt infiltration and melt infiltration, 19 and electric arc synthesis. 20 However, conventional synthesis methods require high temperatures attained and maintained in an inert atmosphere or a vacuum; this approach is energy and resource intensive and requires expensive equipment.…”

Section: Introductionmentioning

confidence: 99%

“…14 Thus, the use of plant waste-derived carbon for the synthesis of titanium carbide allows for a number of advantages: (1) production of renewable raw materials with a low (zero) sulfur content; (2) utilization of waste during synthesis of practical products; (3) fabrication of carbides with a biomorphic structure unique for each plant species used to obtain biochar; (4) disposal of waste-derived carbon in the composition of functional ceramics, which among others can be used to manufacture devices for renewable energy. Titanium carbide can be produced by self-propagating high-temperature synthesis, 15 electrical explosion of conductors, 10 carbothermal reduction, 16,17 sol-gel infiltration, 18 vapor infiltration, 13 molten salt infiltration and melt infiltration, 19 and electric arc synthesis. 20 However, conventional synthesis methods require high temperatures attained and maintained in an inert atmosphere or a vacuum; this approach is energy and resource intensive and requires expensive equipment.…”

Section: Introductionmentioning

confidence: 99%

Vacuum-free electric arc synthesis of titanium carbide using plant waste-derived carbon

Gumovskaya,

Pak,

Yankovsky

et al. 2023

New J. Chem.

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“…Additionally, due to the flexibility of the synthesis process, it is possible to produce materials with specific characteristics by altering the synthesis settings or employing various metal ions. This approach can be applied to explore the synthesis of other nanocomposite materials with potentially remarkable characteristics which integrate the advantages of mesoporous silica with the reactivity and adaptability of the added metal ions, as well as other functionalities [45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, thermal evolution and magnetic investigations of SBA-15 silica functionalized with anchored iron phosphonate molecules

et al. 2023

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In the current work, we report on synthesizing a series of novel nanocomposite materials obtained by functionalizing the SBA-15 silica matrix with anchored iron phosphonate molecules and following thermal treatment. Obtained results reveal the formation of a unique amorphic layer of Fe-based compounds on the surface of silica walls of SBA-15 channels as a result of the organic groups' decomposition after the moderate thermal treatment. Due to their unique structure, represented in an active Fe-containing amorphous coating spread over a large surface area, these materials are of great interest for their potential applications in fields such as catalysis, adsorption, and non-linear optics. Obtained materials remain amorphous, preserving the SBA-15 mesoporous structure up to the temperatures of approximately 800 °C, after which the partial melting of the silica backbone is observed with simultaneous formation of nanocrystals inside the newly-formed glassy mass. All obtained materials were characterized using such techniques as thermogravimetry, transmission and scanning electron microscopy combined with energy dispersive X-ray spectroscopy mapping, Raman spectroscopy, N2 sorption analysis, X-ray diffraction, X-ray photoelectron spectroscopy, Mössbauer spectroscopy, and SQUID measurements.

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Synthesis and characterization of mesoporous TiC nanopowder/nanowhisker with low residual carbon processed by sol–gel method

Cited by 31 publications

References 43 publications

Exploring the impact of pH and temperature on TiC nanopowders syntesized via sol-gel and subsequent crystallization by carbothermal reduction method

Exploring the impact of pH and temperature on TiC nanopowders syntesized via sol-gel and subsequent crystallization by carbothermal reduction method

Vacuum-free electric arc synthesis of titanium carbide using plant waste-derived carbon

Synthesis, thermal evolution and magnetic investigations of SBA-15 silica functionalized with anchored iron phosphonate molecules

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