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The abatement of environrnental pollutants, and especially the availability of clean water in sufficient
amounts, are important issues in large and industrialized cities as well as in less developed regions.
Advanced oxidation processes (AOPs) can decisively contribute to water purification. As a
consequence, the development of effective catalysts has prompted enormous attention in materiais
science. Carbon materiais have been widely employed in AOPs, usually as catalyst supports and less
commoniyas catalysts on their OWD. An overview ofthe different steps involved in the development of
suitable catalysts from the nano- to the macro-scale will be presented in this work, with particular
emphasis on the use of carbon materiais for wet air oxidation, wet peroxide oxidation, ozonation, and
photocatalysis. Our studies show that carbon materiais with no added metais can be used as efficient
catalysts in these processes, including activated carbons, carbon xerogels, multi-walled carbon
nanotubes, as well as carbon foarns and fibres [1-4]. The work under progress aims at the development
of more efficient and stable carbon materiais with tuned surface chellÚstry. In the particular case of
photocatalysis, titaninrn dioxide (Ti02) is the most frequently used catalyst; however, aiming at solar
applications, there is a drive to improve its activity under near-UVNis irradiation. Our recent work in
this field is focused on the development of active and stable carbon-Ti02 nanostructured composites,
including diverse carbon materiais, such as fullerenes, carbon nanotubes, nanodiamonds, graphene and
its derivatives [5]
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Citação
Silva, Adrián; Gomes, Helder; Pereira, Manuel; Faria, Joaquim; Órfão, José; Figueiredo, José (2013). Towards the development of water purification technologies using carbon materials and metal oxides. In 19th International Conference on Advanced Oxidation Technologies for Treatment of Water, Air and Soil. San Diego, Estados Unidos da América. p. 99