Production and characterization of hybrid nanomaterials from electrospun nanofibers and evaluation of their efficiency against the electrochemical oxidation of atrazine

• Grant number: 18/16308-8
• Support Opportunities: Scholarships in Brazil - Doctorate
• Effective date (Start): January 01, 2019
• Effective date (End): February 28, 2023
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Artur de Jesus Motheo
• Grantee: Rodrigo de Mello
• Host Institution: Instituto de Química de São Carlos (IQSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil
• Associated research grant: 17/10118-0 - Study and application of electrochemical technology for the analysis and degradation of endocrine interferents: materials, sensors, processes and scientific dissemination, AP.TEM
• Associated scholarship(s): 20/03052-5 - Development of electrochemical process to emergent pollutant removal using a pre-concentration step, BE.EP.DR

Abstract

The electrochemical processes have gained notoriety in the treatment of contaminated water and effluents, the importance of water reuse and, above all, the possibility of CO2 and H2O generation at the end of the procedure. Several factors have influence in such processes, among which the material of the electrode and the species that compose the aqueous medium can be highlighted. Among the materials most used, boron doped diamond anodes, which are characterized by the generation of hydroxyl radicals, and the metal oxide mixing electrodes, which present a lower generation of these radicals, but generate oxidant species from the present anions in the solution, and it should be noted that the amount of substances generated is proportional to the electrochemically active area of the electrode. Thus, the use of nanomaterials is gaining space, since they generally have a high surface area. As an example, it is possible to highlight the nanofibres that, due to the combination of the high ratio between area and volume and the characteristics of 1-D confinement, promote a greater interaction with the medium.Agricultural defenses that present in their constitution chlorine atoms are extremely efficient but resistant to decomposition in biological systems. Atrazine is one of the herbicides most used in the fight against weeds in various agricultural crops. The present project aims at the development of hybrid nanomaterials from the combination of nanofibers with nanoparticles. These materials will be analyzed by physicochemical and electrochemical characterization techniques, such as scanning electron microscopy, X-ray diffraction and cyclic voltammetry. The evaluation of the efficiency of the materials produced will be done by means of the application in the electrochemical oxidation of atrazine, which will be accompanied by high performance liquid chromatography, mass spectrometry and measurement of total organic carbon. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DE MELLO, RODRIGO; RODRIGO, MANUEL A.; MOTHEO, ARTUR J.. Electro-oxidation of tetracycline in methanol media on DSA (R)-Cl-2. Chemosphere, v. 273, JUN 2021. (18/16308-8, 17/20444-1, 20/03052-5, 17/10118-0)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

MELLO, Rodrigo de. Analysis of the combination of adsorption technologies on granular activated carbon and electrochemical oxidation for the treatment of effluents contaminated with benzene. 2023. Doctoral Thesis - Universidade de São Paulo (USP). Instituto de Química de São Carlos (IQSC/BT) São Carlos.