GREEN PREPARATION OF SINGLE-WALLED CARBON NANOTUBES/GOLD NANOCOMPOSITES AND STUDY ON THE DETECTION OF INDIGO BLUE
DOI:
https://doi.org/10.32347/2412-9933.2021.48.160-164Ключові слова:
Single-walled carbon nanotubes, Gold nanoparticles, Indigo blue, Electrochemical sensorАнотація
Single-walled carbon nanotubes (SWNTs) have attracted more and more attention due to their unique structure and excellent properties. In this paper, single-walled carbon nanotubes /gold (SWNTs/Au) nanocomposites were prepared by a green and simple method, and a highly sensitive indigo blue sensor was constructed based on the nanocomposites. The results showed that the optimum pH of indigo blue (IB) was 5 and the optimum enrichment time was 270s. The reaction was controlled by surface adsorption.
The unique feature of this method is that no toxic reducing agents or surfactants are added during the preparation process, which is environmentally friendly and sensitive to the detection of IB based on the nanocomposite modified electrode. Compared with gold nanomaterials, single-wall carbon nanotube-gold nanocomposites are more sensitive to IB. Comparing the current response signals of different pH values, 0.1mol/LPBS solution with pH=5 was selected as the test solution. When the enrichment time reaches 270s, the IB adsorbed on the electrode surface tends to be saturated, so the optimal enrichment time is 270s. The above experiments show that the nanocomposite material has a good electrocatalytic ability for IB, and the detection limit (3S/N) is 0.02μmol/L. The modified electrode has a short response time, a wide linear range, a low detection limit, good selectivity and high stability.
Посилання
Cheng, H M, Li, F, Su, G et al. (1998). Large-scale and low-cost IBnthesis of single-walled carbon nanotubes by the catalytic pyrolysis of hydrocarbons. [J]. Appl Phys Lett, 72(25), 3282–3284.
Journet, M. K., Bernier, C. (1997). Large scale production of sing lewalled carbon nanotubes by the electricarc technique. [J]. Nature, 388, 756.
Iijima, S. (1991). Helical microtubules of graphitic carbon. [J]. Nature, 354–356.
Thess, A., Lee, R., Nikolaev, P., Dai, H. (1996). Crystalline Ropes of Metallic Carbon Nanotubes. [J]. Science, 273(5274), 483–487.
Colomer, J. F., Bister, G., Willems, I. et al. (1999). Ibn thesis of single-welled carbon nanotubes catalytic decomposition of hydrocarbons. [J]. Chem. Commun., 1343–1344.
Sun, L. F., Mao, J. M., Pan, z. W. et al. (1999). Growth of straight nanotubes with a cobalt-nickel catalyst by chemical vapor deposition. [J]. Appl. Phys. Lett., 74, 644–646.
Chang, T. (2008). Dominoes in Carbon Nanotubes. [J]. Phys. Rev. Lett., 101(17), 5501.
Terrones, M., Hsu, W. K., Hare, J. P. (1996). Metal particle catalysed production of nanoscale BN structures. [J]. Chem Phys Lett, 259, 568-573.
Li, Y. L., Yu, Y. D, liang, Y. (1997). A novel method for IBnthesis of carbon nanotubes: Low temperature solid pyrolysis. [J]. J Mater Res, 12, 1678–1680.
Vander Wal, R L., Ticich, T M., Curtis, V E. (2000). Diffusion flame IBnthesis of single-walled carbon Nanotubes. J. Chem Phys Lett, 323(3), 217-223.
Conway, B. E. (1999). Electrochemical supercapacitors, scientific fundamentals and technological applications. Kluwer Academic Publishers, Plenum Press, New York, 321, 56–60.
Stoller, M. D., Park, S., Zhu, Y., An, J., Ruoff, R. S. (2008). Graphene-based ultracapacitors. [J]. Nano Lett., 8, 3498–3502.
##submission.downloads##
Опубліковано
Як цитувати
Номер
Розділ
Ліцензія
Авторське право (c) 2021 Weihua Cheng
Ця робота ліцензується відповідно до Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
