Synthesis of Environmentally Friendly Carbon Nano Fibers with Methanol by Using Chemical Vapor Deposition Technique
Öz
This study aims to investigate the suitability of methanol as a carbon source for the synthesis of carbon nanofibres (CNFs), currently used in wastewater, water, and air purification systems, by chemical vapor deposition (CVD) in the presence of NiO catalyst. Experimental studies were carried out in a tube furnace under isothermal conditions. Catalyst particles were loaded onto silicon wafers with <100> orientation by dip coating to grow CNFs. The reduction behavior of nickel oxide powder at 1000 K under non-isothermal and isothermal conditions was investigated before CNF synthesis studies. The percentage reduction of nickel oxide powder under non-isothermal conditions was 82.03%. The percentage reduction under isothermal conditions for 30 min was 78.03%. The experimental result obtained is very close to the theoretical value (78.57%). During CNF synthesis experiments, it was observed that CNF formation was not achieved at temperatures of 1000 - 1100 K due to the poor thermal decomposition of methanol. Pyrolysis of methanol increased with increasing synthesis temperature (1200 K), which promoted the synthesis of CNFs. SEM analysis revealed morphologically dense CNF formation under isothermal conditions for 20 min at 1300K synthesis temperature.
Anahtar Kelimeler
Carbon Nano Fiber, Chemical Vapor Deposition, Methanol, NiO catalyst
Kaynakça
- Altay, M.C. & Eroglu, S. (2012). Synthesis of multiwalled C nanotubes by Fe-Ni (70 wt.%) catalyzed chemical vapor deposition from pre-heated CH4. Materials Letters, 67(1). DOI: 10.1016/j.matlet.2011.09.011
- Altay, M.C. & Eroglu, S. (2013a). Growth of multiwalled C nanotubes from pre-heated CH4 using Fe3O4 as a catalyst precursor. Diamond and Related Materials, 31. DOI: 10.1016/j.diamond.2012.10.009
- Altay, M.C. & Eroglu, S. (2013b). Thermodynamic analysis and chemical vapor deposition of multiwalled carbon nanotubes from pre-heated CH4 using Fe2O3 particles as catalyst precursor. Journal of Crystal Growth, 364. DOI: 10.1016/j.jcrysgro.2012.11.062
- Altay, M.C. & Eroglu, S. (2016). Non-isothermal reduction behavior of NiO in undiluted Ar and CH4 atmospheres. International Journal of Mineral Processing, 149. DOI: 10.1016/j.minpro.2016.02.005
- Altay, M.C. & Eroglu, S. (2019). Synthesis of Mo2C from MoO3 and C5OH. JOM, 71(8). DOI: 10.1007/s11837-019-03571-z
- Bai, Z., Liu, Q., Lei, J. & Jin, H. (2018). Investigation on the mid-temperature solar thermochemical power generation system with methanol decomposition. Applied Energy, 217, 56-65. DOI: 10.1016/j.apenergy.2018.02.101
- Bhatt, P. & Goe, A. (2017). Carbon Fibres: Production, Properties and Potential Use. Material Science Research India, 14(1), 52-57. DOI: 10.13005/msri/140109
- Chen, D.S., Wang, Y. & Zou, Y.X. (2020). Activated Carbon Fiber Fabrics in Filtration and Clean Water Resources. Materials Science Forum, 980, 387-393. DOI: 10.4028/www.scientific.net/MSF.980.387
- Falzon, B. G. (2022). Computational modelling of the crushing of carbon fibre-reinforced polymer composites. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 380(2232). DOI: 10.1098/rsta.2021.0336
- Grace, N. & Singh, S. (2005). Durability Evaluation of Carbon Fiber-Reinforced Polymer Strengthened Concrete Beams: Experimental Study and Design. ACI Structural Journal, 102.