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Hybrid systems between titanium dioxide and carbon nanotubes in photocatalytic processes

Grant number: 13/19949-0
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): November 01, 2013
Effective date (End): August 31, 2014
Field of knowledge:Physical Sciences and Mathematics - Chemistry
Principal Investigator:Paola Corio
Grantee:Natália Augusto Soares
Home Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:12/13119-3 - Vibrational spectroscopy in condensed phases, AP.TEM

Abstract

This project aims to study photocatalytic degradation processes of environmentally relevant chemical species. The focus will be directed to the study of properties of hybrid systems formed between semiconductor materials (mainly TiO2) and carbon nanotubes as photocatalysts. We will investigate synthesis methodologies of composites between semiconductor TiO2 and two types of carbon nanotubes: single wall carbon nanotubes (SWNT) and multi-walled carbon nanotubes (MWNT). The composites will be characterized by vibrational spectroscopy (Raman and infrared) and electron microscopy techniques, and their performance in heterogeneous photocatalysis processes will be evaluated through the degradation of textile dyes. Considering the use of such hybrid systems as catalysts in heterogeneous photocatalysis processes, carbon nanotubes can act as an extraction phase associated with titanium dioxide, thus favoring the interaction between the target substances and the organic semiconductor. This approach seeks to contribute to the development of more efficient catalysts and to the understanding of the effect of carbon nanotubes in processes of heterogeneous photocatalysis.