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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

New Approach of the Oxidant Peroxo Method (OPM) Route to Obtain Ti(OH)(4) Nanoparticles with High Photocatalytic Activity under Visible Radiation

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Autor(es):
Nogueira, Andre E. [1, 2] ; Ribeiro, Lucas S. [3] ; Gorup, Luiz F. [4] ; Silva, Gelson T. S. T. [2] ; Silva, Fernando F. B. [2] ; Ribeiro, Caue [2] ; Camargo, Emerson R. [3]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Nanotechnol Natl Lab LNNano, BR-13083970 Campinas, SP - Brazil
[2] Brazilian Agr Res Corp, EMBRAPA, Natl Lab Nanotechnol Agrobusiness LNNA, Rua 15 Novembro 1452, BR-13560970 Sao Carlos, SP - Brazil
[3] Univ Fed Sao Carlos, Dept Chem, Interdisciplinary Lab Electrochem & Ceram LIEC, Rod Washington Luis Km 235, CP 676, BR-13565905 Sao Carlos, SP - Brazil
[4] Fed Univ Grande Dourados, Dept Chem, FACET, BR-79804970 Dourados, MS - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: INTERNATIONAL JOURNAL OF PHOTOENERGY; 2018.
Citações Web of Science: 0
Resumo

Environmental problems related to the generation of wastewater contaminated with organic compounds and the emissions of pollutants from fuel burning have become major global problems. Thus, there is a need for the development of alternative and economically viable technologies for the remediation of the affected ecosystems. Therefore, this work describes the preparation and characterization of a Ti(OH)(4) catalyst with the modified surface for application in the photodegradation of organic compounds (methylene blue (MB) dye and the drug amiloride (AML)) and in the artificial photosynthesis process. Characterization results reveal that peroxo groups on the surface of the catalyst had a great influence on the optical properties of the Ti(OH)(4) and consequently in its photocatalytic property. This catalyst showed a high photocatalytic activity for the degradation of organic pollutants under visible radiation, reaching approximately 98% removal of both the dye and the drug in 150 min of reaction. In addition, the catalyst presented a great potential for the reduction of CO2 under ultraviolet (UV) radiation when compared to P25, which is a classic catalyst used in photocatalytic processes. The highest photocatalytic activity can be attributed to the strong visible light absorption, due to the narrow band gap, and the effective separation of photogenerated electron-hole pairs caused by the peroxo groups on the Ti(OH)(4) surface. (AU)

Processo FAPESP: 14/09014-7 - Estudo do potencial de nano-heteroestruturas de óxidos de cobre e nióbio para aplicação em fotossíntese artificial
Beneficiário:André Esteves Nogueira
Linha de fomento: Bolsas no Brasil - Pós-Doutorado