Advanced search
Start date
Betweenand

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 type:Scholarships in Brazil - Doctorate
Effective date (Start): January 01, 2019
Effective date (End): February 28, 2021
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal Investigator:Artur de Jesus Motheo
Grantee:Rodrigo de Mello
Home 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

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)