درصد پراکندگی و سرباره به‌عنوان شاخصی ساده از میزان آمورف آرایه‌های نانولوله کربنی

نویسندگان

گروه مهندسی شیمی، دانشگاه فردوسی مشهد، مشهد، ایران

چکیده

نانولوله‌های کربنی دارای ناخالصی‌هایی بوده و یکی از روش‌های خالص‌سازی آنها، آمورف‌زدایی است. در این پژوهش برای اولین بار از محلول پیرانا با نسبت 1:3 (30 میلی‌لیتر سولفوریک اسید + 10 میلی‌لیتر هیدروژن پراکسید) با زمان فرآوری 30 دقیقه و مایکروویو به‌منظور آمورف‌زدایی از آرایه نانولوله کربنی آمورف‌دار استفاده شد. از امواج فراصوت به‌منظور پراکندگی نانولوله‌های کربنی اولیه و آمورف‌زدایی شده در آب و از سانتریفیوژ برای جداسازی ذرات درشت استفاده شد. برای بررسی آمورف‌زدایی، روش‌های جدیدی مانند درصد پراکنش یافته و درصد سرباره بررسی شد. مشخص شد با افزایش زمان فراصوت از صفر تا 50 دقیقه، درصد پراکنش یافته آرایه فرآوری شده بیشتر (حدود 47 درصد) و درصد سرباره آرایه خالص کمتر (حدود 20 درصد) می‌شود. این نتایج به کاهش آمورف مربوط می‌شود. با انجام آزمون توزین حرارتی، مشخص شد که نتایج حاصل از آزمون با نتایج حاصل از روش‌های تعیین درصد پراکنش یافته و سرباره توافق دارند.

کلیدواژه‌ها

عنوان مقاله [English]

DISPERSION AND FLOATING PERCENTAGE AS A SIMPLE INDICATOR OF THE AMOUNT OF AMORPHOUS CARBONS IN CARBON NANOTUBE ARRAYS

نویسندگان [English]

  • F. Delshad
  • M. Maghrebi
  • M. Baniadam
Ferdowsi University of Mashhad, Faculty of Engineering, Department of Chemical Engineering
چکیده [English]

Carbon nanotubes contain impurities and deamorphization is one of the methods of their purification. In this study, for the first time, a solution of piranha with a ratio of 3:1 (30 ml sulfuric acid + 10 ml hydrogen peroxide) as well as microwave irradiation with processing time of 30 minutes were used to remove amorphous carbon from the nanotube arrays. Ultrasonication was performed to disperse pristine and purified carbon nanotubes in water and centrifugation was performed to separate large particles. To assess the removal of amorphous carbon, new characterization methods such as dispersed percent and floating percent were used. It was observed that with increase in the ultrasonication time (from 0 to 50 minutes), the dispersed percentage of treated arrays was increased (about 47%), while the floating percentage of pure array decreased (about 20%). These results are ascribed to the removal of amorphous carbon. The results of the thermo gravimetric analysis (TGA) were in good agreement with the results obtained from the newly proposed characterization methods.

کلیدواژه‌ها [English]

  • Carbon nanotube array
  • amorphous
  • Piranha
  • microwave
  • Removal of amorphous carbon

مراجع

1. Iijima, S., “Helical Microtubules of Graphitic Carbon”, Nature, Vol. 354, No. 6348, pp. 56-58, 1991.
2. Majumder, M., and Ajayan, P., “Carbon Nanotube Membranes: A New Frontier in Membrane Science”, Comprehensive Membrane Science and Engineering, Vol. 1, pp. 291-310, 2010.
3. Wepasnick, K., Smith, B., Bitter, J., and Fairbrother, D., “Chemical and Structural Characterization of Carbon Nanotube Surfaces”, Analytical and Bioanalytical Chemistry, Vol. 396, pp. 1003-1014, 2010.
4. Soltani, M., Niroumand, B., and Shamanian, M., “Optimization of Surface Mechanical Properties and Characterization of AZ31B/CNT Nano-Composite through Friction Stir Processing (FSP) using Response Surface Methodology (RSM) Design of Experiment”, ESTEGHLAL Journal of Advance Materials in Engineering, Vol. 36, No.2, pp. 15-32, 2017.
5. Liu, Z., Xiao, B., Wang, W., and Ma, Z., “Analysis of Carbon Nanotube Shortening and Composite Strengthening in Carbon Nanotube/Aluminum Composites Fabricated by Multi-Pass Friction Stir Processing”, Carbon, Vol. 69, pp. 264-274, 2014.
6. Balasubramanian, K., and Burghard, M., “Chemically Functionalized Carbon Nanotubes”, Small, Vol. 1, No. 2, pp. 180-192, 2005.
7. Boussouari, B., and Baitoul, M., “A Comparative Study of Multi-Walled Carbon Nanotubes Purification Techniques”, Journal of Materials Science and Engineering with Advanced Technology, Vol. 9, No. 1, pp. 1-15, 2014.
8. Mahalingam, P., Parasuram, B., Maiyalagan, T., and Sundaram, S., “Chemical Methods for Purification of Carbon Nanotubes-A Review”, Journal of Environment Nanotechnology, Vol. 1, No. 1, pp. 53-61, 2012.
9. Hu, H., Zhao, B., Itkis, M., and Haddon, R., “Nitric Acid Purification of Single-Walled Carbon Nanotubes”, The Journal of Physical Chemistry B, Vol. 107, No. 50, pp. 13838-13842, 2003.
10. Ziegler, K., Gu, Zh., Peng, H., Flor, E., Hauge, R., and Smalley, R., “Controlled Oxidative Cutting of Single-Walled Carbon Nanotubes”, Journal of the American Chemical Society, Vol. 127, No. 5, pp. 1541-1547, 2005.
11. Wiltshire, J., Khlobystov, A., Li, L., Lyapin, S., Briggs, G., and Nicholas, R., “Comparative Studies on Acid and Thermal Based Selective Purification of HiPCO Produced Single-Walled Carbon Nanotubes”, Chemical Physics Letters, Vol. 386, No. 4-6, pp. 239-243, 2004.
12. Li, Y., Zhng, X., Luo, J., Huang, W., Cheng, J., Luo, Zh., Li, T., Liu, F., Xu, G., Ke, X., Li, L., and Geise, H., “Purification of CVD Synthesizedsingle-Wall Carbon Nanotubes by Differentacid Oxidation Treatments”, Nanotechnology, Vol. 15, No. 11, pp. 1645-1649, 2004.
13. Hou, P., Liu, Ch., and Cheng, H., “Purification of Carbon Nanotubes”, Carbon, Vol. 46, No. 15, pp. 2003-2025, 2008.
14. Hammadi, A., Jasim, A., Abdulrazzak, F., Al-Sammarraie, A., Cherifi, Y., Boukherroub, R., and Hussein, F., “Purification for Carbon Nanotubes Synthesized by Flame Fragments Deposition via Hydrogen Peroxide and Acetone”, Materials, Vol. 13, No. 10, pp. 2342-2351, 2020.
15. Azodpour, J., and Baniadam, M., “Microwave Assisted Purification of Multi-Walled Carbon Nanotubes by Potassium Permanganate; Effect of Acid to Oxidant Molar Ratio and Treatment Time”, Materials, Vol. 98, No. 1, pp. 107485-107491, 2019.
16. Gomez, V., Irusta, S., Lawal, O., Adams, W., Hauge, R., Dunnill, Ch., and Barron, A., “Enhanced Purification of Carbon Nanotubes by Microwave and Chlorine Cleaning Procedures”, RSC Advances, Vol. 6, No. 14, pp. 11895-11902, 2016.
17. Das, R., E. Ali, Md., Abd Hamid, Sh., M. Annuar, M. S., and Ramakrishna, S., “Common Wet Chemical Agents for Purifying Multiwalled Carbon Nanotubes”, Journal of Nanomaterials, Vol. 2014, pp. 1-9, 2014.
18. “Acid Piranha Solution: User Guidance”, Occupationnal Health & Safety Service, University of Cambridge, https://www.environment.admin.cam.ac.uk/news/update-report-safety-office, 2016.
19. Liu, J., and Harris, A., “Microwave-Assisted Acid Digestion of Alumina-Supported Carbon Nanotubes”, Separation and Purification Technology, Vol. 62, No. 3, pp. 602-608, 2008.
20. Ko, F., Lee, Ch., Ko, Ch., and Chu, T., “Purification of Multi-Walled Carbon Nanotubes through Microwave Heating of Nitric Acid in a Closed Vessel”, Carbon, Vol. 44, No. 4, pp. 727-733, 2005.
21. Wepasnick, K. A., Smith, B. A., Schrote, K. E., Wilson, H. K., Diegelmann, S. R., and Fairbrother, D. H., “Surface and Structural Characterization of Multi-Walled Carbon Nanotubes Following Different Oxidative Treatments”, Carbon, Vol. 49, No. 1, pp. 24-36, 2011.
22. Islam, M. F., Rojas, E., Bergey, D. M., Johnson, A. T., and Yodh, A. G., “High Weight Fraction Surfactant Solubilization of Single-Wall Carbon Nanotubes in Water”, Nano Letters, Vol. 3, No. 2, pp. 269-273, 2003.
23. Hou, P. X., Liu, Ch., and Chang, H. M., “Purification of Carbon Nanotubes”, Carbon, Vol. 46. No. 15, pp. 2003-2025, 2008.
24. Ling-Chao, C., Yun-Qi, L., Yu, W., Da-Cheng, W., Lei, F., Ping-An, H., Hong-Liang, Zh., Li-Ping, H., and Gui, Y., “Wet Purification of Aligned Carbon Nanotube Arrays and Its Impact on the Morphology of the Carbon Nanotube Array”, Acta Physico-Chimica Sinica, Vol. 24, No. 6, pp. 951-954, 2008.
25. Grossiord, N., Regev, O., Loos, J., Meuldijk, J., and Koning, C. E., “Time-Dependent Study of the Exfoliation Process of Carbon Nanotubes in Aqueous Dispersions by Using UV-Visible Spectroscopy”, Analytical Chemistry, Vol. 77, No. 16, pp. 5135-5139, 2005.
26. Aria, A. I., “Control of Wettability of Carbon Nanotube Array by Reversible Dry Oxidation for Super hydrophobic Coating and Super capacitor Applications”, Thesis for PhD, California Institute of Technology, Pasadena, California, 2013.
27. Daneshvar e Asl, S., and Sadrnezhaad, S. K., “Structural and Physical Properties of TiO2/CNT Nanocomposite Thin Films Synthesized by Sol/Gel Dip Coating Method for using in Dye-Sensitized Solar Cell”, ESTEGHLAL Journal of Advance Materials in Engineering, Vol. 36, No.3, pp. 101-109, 2017.
28. Wepasnick, K. A., Smith, B. A., Schrote, K. E., Wilson, H. K., Diegelmann, S. R., and Fairbrother, D. H., “Surface and Structural Characterization of Multi-Walled Carbon Nanotubes Following Different Oxidative Treatments”, Carbon, Vol. 49, No. 1, pp. 24-36, 2011.
29. Jaafaripour Maybody, J., Salahi, E., Nemati, A., and Amin, M. H., “In-situ Preparation of Hydroxyapatite-Carbon Nanotubes Nanocomposite and Investigation of its Microstructure and Morphology”, ESTEGHLAL Journal of Advance Materials in Engineering, Vol. 30, No.1, pp. 1-11, 2010.
30. Lehman, J., Terrones, M., Mansfield, E., Hurst, K., Meunier, V., “Evaluating the Characteristics of Multiwall Carbon Nanotubes”, CARBON, Vol. 49, pp. 2581-2602, 2011.
مواد پیشرفته در مهندسی
دوره 40، شماره 2
شهریور 1400
صفحه 127-140

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