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TiO2/CuO Films Obtained by Citrate Precursor Method for Photocatalytic Application

Materials Sciences and Applications（材料科学与应用期刊） 2011年第6期

作者： Leinig Perazolli Luciana Nu？ez milady renata apolinário da silva Guilherme Francisco Pegler Ademir Geraldo Cavalarri Costalonga Rossano Gimenes Márcia Matiko Kondo Maria Aparecida Zaghete Bertochi

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TiO_(2)/CuO Films Obtained by Citrate Precursor Method for Photocatalytic Application

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Materials Sciences and Applications 2011年第6期2卷 564-571页

作者： Leinig Perazolli Luciana Nunez milady renata apolinario da silva Guilherme Francisco Pegler Ademir Geraldo Cavalarri Costalonga Rossano Gimenes Marcia Matiko Kondo Maria Aparecida Zaghete Bertochi Microwave Sintering and Photocatalysis Laboratory Instituto de Quimica de AraraquaraUniv Estadual de Sao PauloAraraquaraBrazil UNIFEI-Federal University of Itajuba ItajubaBrazil

In the present work, the hybrid catalyst films of TiO2/CuO containing up to 10% in mol of copper were deposited onto glass surface. Precursor solutions were obtained by citrate precursor method. Films were porous and the average particle size was 20 nm determined by FEG-SEM analysis. The photocatalytic activities of these films were studied using Rhodamine B as a target compound in a fixed bed reactor developed in our laboratory and UV lamp. It was observed that the addition of copper to TiO2 increased significantly its photocatalytic activity during the oxidation of Rhodamine B. The degradation exceeded 90% within 48 hours of irradiation compared to 38% when pure TiO2 was used. Moreover, there was a reduction in the particles band gap energy when compared to that of pure TiO2. These results indicate that the TiO2/CuO films are promising catalysts for the development of fixed bed reactors to be used to treat effluents containing azo dyes.

关键词： TiO_(2)/CuO Citrate Precursor Method Thin Film Rhodamine B Photocatalytic Oxidation

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Photocatalytic Degradation of Ibuprofen Using TiO<sub>2</sub>and Ecotoxicological Assessment of Degradation Intermediates against <i>daphnia similis</i>

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Journal of Environmental Protection 2014年第7期5卷 620-626页

作者： Farley S. Braz milady R. A. silva Flávio S. silva Sandro J. Andrade Ana L. Fonseca Márcia M. Kondo Natural Resource Institute Universidade Federal de Itajubá Itajubá Brazil Physic and Chemistry Institute Universidade Federal de Itajubá Itajubá Brazil

Several pharmaceutical compounds have been detected in natural aqueous systems and ibuprofen (IBF), one of the most consumed medicament, has been detected in many countries. The degradation efficiency of IBF under TiO2/UV radiation was evaluated. Optimum degradation results were observed using 20 mg·L-1 of TiO2, pH 7.8 and 5 mg·L-1 of IBF. Under these experimental conditions total IBF removal was achieved in less than 60 min of irradiation. Although total IBF concentration was observed, the total mineralization of the compound was not achieved. The by-products generated during TiO2/UV reaction showed to be more toxic against daphnia similis than the initial IBF present in aqueous solution.

关键词： Photodegradation TiO2 Ibuprofen Acute Toxicity

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