Chemical vapor deposition synthesis of carbon spheres: Effects of temperature and hydrogen

Panickar, Radhika; Sobhan, C. B.; Chakravorti, S.

doi:10.1016/j.vacuum.2019.109108

Cited by 36 publications

(15 citation statements)

References 38 publications

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“…Obviously, the absorption peak at around 2920 cm −1 , which was associated with the hydroxyl group, was also found in this Raman spectrum [107][108][109]. Panickar et al explained that the G mode is attributed to the stretching motion of the sp 2 -hybridized carbon atoms' bond in pairs, whereas the D mode is associated with the breathing motion of the sp 2 -hybridized carbon atoms in rings [110]. Even though these absorption bands are general bands in the spectra analysis using Raman spectroscopy for various disordered, amorphous, and noncrystalline forms of carbon atoms, they were not discovered when the glycine solution was analyzed using Raman spectroscopy device before the high-voltage discharge plasma treatment.…”

Section: 4 For Peermentioning

confidence: 54%

“…bond in pairs, whereas the D mode is associated with the breathing motion of the sp 2hybridized carbon atoms in rings [110]. Even though these absorption bands are general bands in the spectra analysis using Raman spectroscopy for various disordered, amorphous, and noncrystalline forms of carbon atoms, they were not discovered when the glycine solution was analyzed using Raman spectroscopy device before the high-voltage discharge plasma treatment.…”

Section: 4 For Peermentioning

confidence: 98%

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Pulsed Discharge Plasma in High-Pressure Environment for Water Pollutant Degradation and Nanoparticle Synthesis

Diono

Machmudah

Kanda

et al. 2021

Plasma

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The application of high-voltage discharge plasma for water pollutant decomposition and the synthesis of nanoparticles under a high-pressure argon gas environment (~4 MPa) was demonstrated. The experiments were carried out in a batch-type system at room temperature with a pulsed DC power supply (15.4 to 18.6 kV) as a discharge plasma source. The results showed that the electrode materials, the pulsed repetition rates, the applied number of pulses, and the applied voltages had a significant effect on the degradation reactions of organic compounds. Furthermore, carbon solid materials from glycine decomposition were generated during the high-voltage discharge plasma treatment under high-pressure conditions, while Raman spectra and the HRTEM images indicated that titanium dioxide with a brookite structure and titanium carbide nanoparticles were also formed under these conditions. It was concluded that this process is applicable in practice and may lead to advanced organic compound decomposition and metal-based nanoparticle synthesis technologies.

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Section: 4 For Peermentioning

confidence: 54%

Section: 4 For Peermentioning

confidence: 98%

Pulsed Discharge Plasma in High-Pressure Environment for Water Pollutant Degradation and Nanoparticle Synthesis

Diono

Machmudah

Kanda

et al. 2021

Plasma

View full text Add to dashboard Cite

show abstract

“…In the synthesis of carbon spheres and fullerenes, the CVD technique has the major advantage of producing uniform sized structures. In the case of carbon nanofibers synthesis, the CVD technique is advantageous in tailoring the diameter, crystallinity, and also orientation of the fiber axis [ 59 , 62 ]. In CNTs production, the CVD technique has several advantages, including exceptional control over the carbon to catalyst ratio and the product dimensions (length and diameter), as well as alignment [ 59 ].…”

Section: Carbon-based Nanostructured Materialsmentioning

confidence: 99%

Synthesis of Carbon Nanomaterials from Biomass Utilizing Ionic Liquids for Potential Application in Solar Energy Conversion and Storage

et al. 2020

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Considering its availability, renewable character and abundance in nature, this review assesses the opportunity of the application of biomass as a precursor for the production of carbon-based nanostructured materials (CNMs). CNMs are exceptionally shaped nanomaterials that possess distinctive properties, with far-reaching applicability in a number of areas, including the fabrication of sustainable and efficient energy harnessing, conversion and storage devices. This review describes CNM synthesis, properties and modification, focusing on reports using biomass as starting material. Since biomass comprises 60–90% cellulose, the current review takes into account the properties of cellulose. Noting that highly crystalline cellulose poses a difficulty in dissolution, ionic liquids (ILs) are proposed as the solvent system to dissolve the cellulose-containing biomass in generating precursors for the synthesis of CNMs. Preliminary results with cellulose and sugarcane bagasse indicate that ILs can not only be used to make the biomass available in a liquefied form as required for the floating catalyst CVD technique but also to control the heteroatom content and composition in situ for the heteroatom doping of the materials.

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“…A detailed study on the synthesis of ACSs using CVD and the effect of hydrogen and deposition temperatures on ACS formation have been reported in our previous work. 47 The synthesized ACSs were collected from the chamber for further characterization.…”

Section: ■ Introductionmentioning

confidence: 99%

Highly Efficient Amorphous Carbon Sphere-Based Superhydrophobic and Superoleophilic Sponges for Oil/Water Separation

2021

Self Cite

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In this experimental study, a commercially available polyurethane (PU) sponge coated with amorphous carbon spheres (ACSs) is investigated for oil/water separation. The ACSs synthesized using chemical vapor deposition are embedded in the PU sponge by a simple dip-coating method. The superhydrophobic ACS-PU sponge exhibits a water contact angle (WCA) of 156.2 ± 1° and a sliding angle <5°. The prepared sponge exhibits high absorption capacity, removal of oil spills from water, and demulsification of an oil-in-water emulsion. Absorption capacities of 32–68 times the ACS-PU sponge weight were obtained for different organic solvents and oils. It was found that the prepared ACS-PU sponge can effectively absorb oils under both static and turbulent conditions. Compared with the reported studies on the loading of different carbon materials in sponges for oil/water separation, ACSs in PU have a low loading percentage of ∼7 wt % and better absorption recyclability. The method proposes a simple and cost-effective preparation technique of highly hydrophobic and oleophilic ACS-PU sponges for effective oil/water separation.

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Chemical vapor deposition synthesis of carbon spheres: Effects of temperature and hydrogen

Cited by 36 publications

References 38 publications

Pulsed Discharge Plasma in High-Pressure Environment for Water Pollutant Degradation and Nanoparticle Synthesis

Pulsed Discharge Plasma in High-Pressure Environment for Water Pollutant Degradation and Nanoparticle Synthesis

Synthesis of Carbon Nanomaterials from Biomass Utilizing Ionic Liquids for Potential Application in Solar Energy Conversion and Storage

Highly Efficient Amorphous Carbon Sphere-Based Superhydrophobic and Superoleophilic Sponges for Oil/Water Separation

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