Sensitive and reliable electrochemical detection of nitrite and H2O2 embellish-CoPc coupled with appliance of composite MWCNTs
| Autor: | K. R. Venugopala Reddy, Mounesh |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Detection limit
010401 analytical chemistry 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Amperometry 0104 chemical sciences Analytical Chemistry chemistry.chemical_compound chemistry Electrode Phthalocyanine Environmental Chemistry Differential pulse voltammetry Nitrite Cyclic voltammetry 0210 nano-technology Hydrogen peroxide Spectroscopy Nuclear chemistry |
| Zdroj: | Analytica Chimica Acta. 1108:98-107 |
| ISSN: | 0003-2670 |
| DOI: | 10.1016/j.aca.2020.02.057 |
| Popis: | The electrocatalytic properties of tetra L-Methionine cobalt (II) phthalocyanine (CoTL-MethPc) and functionalized MWCNTs, decorated on glassy carbon electrode (GCE) was investigated. The synthesis of the CoTL-MethPc was confirmed using UV-Vis, FT-IR, XRD, TGA and MASS techniques. Successful modification of GCE with the CoTL-MethPc and their composite was also confirmed using cyclic voltammetry (CVs), differential pulse voltammetry (DPV) and chrono-amperometry (CA) techniques. CoTL-MethPc/MWCNTs/GCE was the best electrode towards nitrite and hydrogen peroxide (H2O2) detection with a very low detection limit (30 and 10 nmol L−1) by CVs method, which compared favorably with literature, good sensitivity, electrocatalytic oxidation of nitrite and hydrogen peroxide on CoTL-MethPc/MWCNTs/GCE electrode was diffusion controlled but characterized with some adsorption of electro-oxidation-reduction reaction intermediates products. The fabricated sensors are easy to prepare, cost-effective and can be applied for real sample analysis of nitrite in beetroot vegetable. The excellent electrocatalytic property of CoTL-MethPc/MWCNTs is high reproducibility, repeatability, selectivity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect