SÍNTESE, CARACTERIZAÇÃO E APLICAÇÃO DE TiO2 NANOESTRUTURADO PARA O TRATAMENTO DE EFLUENTES

• Ano de defesa: 2012
• Autor(a) principal: Andrade, Claudia Turra de
• Orientador(a): Mortari, Sérgio Roberto
• Banca de defesa: Dressler, Valdieri Luis Dressler, Swarowsky, Alexandre
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Centro Universitário Franciscano
• Programa de Pós-Graduação: Programa de Pós-Graduação em Nanociências
• Departamento: Biociências e Nanomateriais
• País: Brasil
• Palavras-chave em Português: nanotecnologia, dióxido de titânio, fotocatálise
• Palavras-chave em Inglês: nanotechnology, titanium dioxide, photocatalysis
• Área do conhecimento CNPq: Biociências e Nanomateriais
• Link de acesso: http://www.tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/512

The amount of wastewater generated in accordance with the growing concern about the scarcity of water resources, is becoming an environmental and public health problem. Wastewater is composed of materials that provide a large amount of phenols, acids and enzymatic products. Advanced oxidation processes (AOP) are the newest alternative for water purification, between scientists. AOP form radicals that can oxide organic materials into carbon dioxide and water (CO2 and H2O) and other inorganic ions. The TiO2, mainly at the anatase phase, has key features that make it a promising material for water purification, since from its low toxicity until the fact that it is activated by light. For use in photocatalysis, TiO2 may be used as powder, crystal or thin film. What determines the form that it will be used is its application. To achieve the objective of this study we produced TiO2 at anatase phase under the powder form and thin films. We observed, after the characterization, that the powder produced was 100% under the anatase phase, with particle average size of 20 nm, zeta potential of -21.0 mV, PDI of 0.8, and a very large specific area of 60.446 m2 g-1. Furthermore, the thin films of TiO2 produced had a thickness of approximately 70 nm and a specific area of 0.1180 m2 g-1, about 30 times higher than the glass slide, which was used as base to thw thin film. Finally, about the application of the material to degradation of dye and antibiotic we obtained positive results once it was possible to observe the gradual elimination of these substances. Unfortunately, the results of the antimicrobial activity of the TiO2 produced are insufficient, what indicates the need for the continuation of this study.