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Mecanismo de fotodegradação de compostos orgânicos catalisada por TiO2

1998; Brazilian Chemical Society; Volume: 21; Issue: 3 Linguagem: Inglês

10.1590/s0100-40421998000300013

ISSN

1678-7064

Autores

Roberta Lourênço Ziolli, Wilson F. Jardim,

Tópico(s)

TiO2 Photocatalysis and Solar Cells

Resumo

COMPOUNDS CATA-LYZED BY TiO 2 .Conventional technology used in the treatment of wastewater has been pointed as a major environmental problem for sustainable development, since minimization is not addressed accordingly.Advanced oxidation processes (AOP), based on the formation of hydroxyl radical ( .OH), a powerful oxidant agent, have been considered to be a potential technology for the destruction of many toxic compounds.Photocatalysis using solar light, an AOP, has been studied for nearly 20 years and recently attracted great interest as a clean-up technology.However, solar detoxification processes have not yet achieved commercial success.This article presents an overview of reaction mechanisms at the surface of semiconductors used as photocatalysts (specially TiO 2 ), when heterogeneous photocatalysis is used to remove hazardous compounds from contaminated sites.

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