Porous materials and composites chemically modified with zirconium (IV) and phosphoric acid: preparation and electroanalytical applications

Author(s)

Tayla Fernanda Serantoni da Silveira

• Document type: Doctoral Thesis
• Press: Ilha Solteira. 2016-09-22.
• Institution: Universidade Estadual Paulista (Unesp). Faculdade de Engenharia. Ilha Solteira
• Defense date: 2016-08-16
• Advisor: Devaney Ribeiro do Carmo

Abstract

The present work describes the electroanalytical and spectroscopic properties of a compound formed from Zr (IV) and phosphoric acid (ZrP), as well as a inorganofunctionalized spongolite with Zr (IV) (EZr). On a first stage, the materials were prepared and characterized using different techniques such as: X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), Solid state nuclear magnetic resonance (NMR), Scanning electron microscopy (SEM), Energy dispersive X-ray (EDS), X-ray diffraction (XRD), Thermogravimetric analysis (TGA) and Analysis of surface area and porosity. On a second stage, it was carried out a study on the electrochemical properties of these materials after forming composites with metal complexes hexacyanoferrate (ZrPAgH and EZrCuH), using a graphite paste electrode. The graphite paste electrode containing ZrPAgH was sensitive to hydrazine concentrations as well as sulfhydryl compounds, such as: N-acetylcysteine, L-cysteine and L-glutathione. The graphite paste electrode containing EZrCuH was applied to the detection of N-acetylcysteine, L-cysteine, nitrite, pyridoxine and hydrazine, with success. (AU)

• FAPESP's process: 13/08495-9 - Porous materials and composites chemically modified with zirconium (IV) and phosphoric acid: Preparation and electroanalytical applications.
• Grantee: Tayla Fernanda Serantoni da Silveira
• Support Opportunities: Scholarships in Brazil - Doctorate