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

• Ano de defesa: 2012
• Autor(a) principal: Andrade, Cláudia Turra de
• Orientador(a): Mortari, Sergio Roberto
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Franciscana
• Programa de Pós-Graduação: Mestrado Acadêmico em Nanociências
• Departamento: Biociências e Nanomateriais
• País: BR
• Palavras-chave em Português: nanotecnologia; dióxido de titânio; fotocatálise
• Palavras-chave em Inglês: nanotechnology; titanium dioxide; photocatalysis
• Área do conhecimento CNPq: CNPQ::ENGENHARIAS
• Link de acesso: http://tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/207; http://www.tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/300

The amount of wastewater generated with the growing concern about the scarcity of water resources in a short time, is a problem of public health and of the environment too. The effluents are composed of materials that provide a large amount of phenols, acids and enzymatic products. To purify water, the advanced oxidation processes (AOP) are the newest and promissor alternative between the scientists. The AOP form radicals that can oxide organic materials into carbon dioxide and water (CO2 and H2O) and other inorganic ions. The TiO2, mainly at anatase phase, has several features that make it a promising material in this area, 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 the application that will be made . To this study we produced TiO2 at anatase phase under the powder form and thin films (the characterization was made separately). We observe, after the characterization, that the powder produced was 100% under the anatase phase, with an average size of particles with 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 inspires the need for the continuation of this study.