Optical properties of carbon nanostructures produced by laser irradiation on chemically modified multi-walled carbon nanotubes

Background: Electrochemical techniques can easily be adopted to solve many problems of pharmaceutical interest. The implementation of electroanalytical methods in the assay of pharmaceutical formulations has increased greatly. Nowadays, owing to the critical importance of electron transfer and surface properties, chemically modified electrodes have been employed in electrochemical sensors. The chemically modified electrode is one of the most popular electroanalytical sensors and used in several applications. Methods: In this work, a β-cyclodextrine/multi-walled carbon nanotubes (β-CD/MWCNTs) composite modified glassy carbon electrode (GCE) was produced and applied to the detection of Rivastigmine hydrogen tartrate (RVT) in pharmaceutical formulations. The voltammetric feature of RVT at this β- CD/MWCNTs modified electrode was evaluated using cyclic voltammetry and square wave voltammetry. Results: The β-cyclodextrin and multi-walled carbon nanotubes modified glassy carbon electrode displayed good electrocatalytic activity in the oxidation of rivastigmine hydrogen tartrate with relatively high sensitivity, stability and lifetime. The calibration graph of the analyte was linear over the range 10- 1500 µM with two linear segments and the detection limit was obtained as 2.0 µM (S/N=3). The results showed that the electrochemical sensor has good sensitivity and selectivity. Conclusion: The β-CD/MWCNTs modified electrode displayed a high electrochemical activity and good sensitivity toward the oxidation of RVT. Compared with the bare MWCNTs coated sensor, the response of analyte increased soundly and the response potential of target analyte shifted negatively. The results indicated that the β-CD/MWCNTs film coated electrode had good catalysis to the voltammetric oxidation of RVT. The prepared sensor was applied to determine RVT in pharmaceutical samples with satisfactory yields. The outcomes indicate that β-CD/MWCNTs coated electrode is a safe choice for the detection of RVT.

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The structure and optical properties of regio-regular poly(3-hexylthiophene) and carboxylic multi-walled carbon nanotubes composite films

Journal of Physics D Applied Physics ◽

10.1088/0022-3727/47/50/505502 ◽

2014 ◽

Vol 47 (50) ◽

pp. 505502 ◽

Cited By ~ 7

Author(s):

Han-Dong Jin ◽

Fei Zheng ◽

Wei-Long Xu ◽

Wei-Hao Yuan ◽

Meng-Qi Zhu ◽

...

Keyword(s):

Carbon Nanotubes ◽

Optical Properties ◽

Composite Films ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

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Carbon nanotubes and carbon fibers in a flash: an easy and convenient preparation of carbon nanostructures using a conventional microwave

Canadian Journal of Chemistry ◽

10.1139/cjc-2019-0244 ◽

2020 ◽

Vol 98 (1) ◽

pp. 49-55 ◽

Cited By ~ 1

Author(s):

María Fernanda Veloz-Castillo ◽

Antonio Paredes-Arroyo ◽

Gerardo Vallejo-Espinosa ◽

José Francisco Delgado-Jiménez ◽

Jeffery L. Coffer ◽

...

Keyword(s):

Electron Microscopy ◽

Carbon Nanotubes ◽

Carbon Fibers ◽

Carbon Nanostructures ◽

Glass Tube ◽

X Ray Diffraction ◽

Transmission Electron ◽

Multi Walled Carbon Nanotubes ◽

Application Fields ◽

Walled Carbon Nanotubes

The growing interest in nanomaterials in different application fields calls for the implementation of simple, economically appealing, and efficient preparative methods. Among the wide variety of nanomaterials, carbon nanostructures have a special place due to their potential technological applications. Here, we present a fast, cheap, and easy-to-implement microwave-assisted method for the preparation of carbon nanotubes (CNTs) and carbon fibers (CFs) at room pressure conditions. The synthesis involves heating a mixture of graphite and ferrocene contained in a simple glass tube using a conventional microwave oven. A mixture of multi-walled carbon nanotubes (MWCNTs) and Fe3O4 magnetic nanoparticles were obtained quickly (less than 30 s) and in good yields. The products were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), and Raman spectroscopy.

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