Carbon black nanospheres modified with Cu (II)-phthalocyanine for electrochemical determination of Trimethoprim antibiotic

Author(s)

Guaraldo, Thais T. ^[1] ; Goulart, Lorena A. ^[1] ; Moraes, Fernando C. ^[2] ; Lanza, V, Marcos R.

Affiliation

^[1] V, Univ Sao Paulo, Sao Carlos Inst Chem, Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Chem Dept, Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: Applied Surface Science; v. 470, p. 555-564, MAR 15 2019.
• Web of Science Citations: 6

Abstract

This work investigates the electrochemical sensing properties of glassy carbon (GC) electrodes modified with Printex L6 carbon black (PC) and copper (II) phthalocyanine (CuPh) films. Successful incorporation of the CuPh into carbon black was confirmed by FEG-SEM, EDS and TEM analysis. The transition from nanocrystalline graphite to amorphous carbon material could be evidenced for Printex L6 carbon black using Raman analysis. The modified material (CuPh/PC/GC) demonstrated electrocatalytic effect towards TMP detection according to cyclic voltammetric studies. CuPh modification resulted in strong adsorption to carbon black and TMP due to pi-pi interactions. Scan rate studies proved reactions across the electrode/electrolyte interface progressively change from adsorption to diffusion. The developed method presented linear relationship in the ranges of 0.4-1.1 mu mol L-1 and 1.5-6.0 mu mol L-1 with limit of detection of 0.6 mu mol L-1 under optimized experimental conditions. The proposed CuPh/PC/GC electrode was effectively employed towards the detection of TMP in natural water samples. (AU)

• FAPESP's process: 16/01937-4 - Synthesis of binary metal oxides (Nb, Zr, ta, Ru, mo and co) supported on amorphous carbon for the production of gas diffusion electrodes (GDE) for the electrosynthesis of H2O2 in situ in flow reactors
• Grantee: Marcos Roberto de Vasconcelos Lanza
• Support type: Regular Research Grants
• FAPESP's process: 14/50945-4 - INCT 2014: National Institute for Alternative Technologies of Detection, Toxicological Evaluation and Removal of Micropollutants and Radioactivies
• Grantee: Maria Valnice Boldrin
• Support type: Research Projects - Thematic Grants
• FAPESP's process: 16/08760-2 - Heterojunction of NiO/ZnO and CuO/ZnO applied at the PHOTOELETRODEGRADATION of trimethoprim and levofloxacin
• Grantee: Lorena Athie Goulart
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 14/11861-0 - Development of nanostructured electrochemical sensors for the determination of antibiotics in samples of environmental interest
• Grantee: Thais Tasso Guaraldo
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 17/10118-0 - Study and application of electrochemical technology for the analysis and degradation of endocrine interferents: materials, sensors, processes and scientific dissemination
• Grantee: Marcos Roberto de Vasconcelos Lanza
• Support type: Research Projects - Thematic Grants