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ZnO/Zn/Amorphous Carbon Matrix Nanostructured Composite Powder: a New Photocatalyst for Dye

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Abstract

Both synthesis and photocatalytic potential of an innovative catalyst-powder type composite material based on the Zn or/and ZnO dispersed in a matrix of amorphous-carbon have been investigated. Zn/ZnO/amorphous-carbon nanostructured-matrix composite was prepared by partial pyrolysis method based on the Pechini method. The amorphous character of composite was characterized X-ray diffraction, while chemical bond investigated by infrared spectroscopy. The photocatalytic activity directed to the degradation of the phenol red dye of small fraction of commercial ZnO, Zn/C and Zn/ZnO/C composites were evaluated as a function of the degradation reaction of the phenol red dye, in the alkaline medium pH = 9. A mass concentration of 1:10,000 was selected being considered 30 and 150 min of reaction A comparison between photocatalytic activity showed that the degradation rate of phenol red dye is more efficient at both ZnO/Zn/C and Zn/C amorphous composites when compared to the pristine ZnO. The efficiency obeys the following order C/Zn ≥ C/ZnO/Zn > commercial ZnO with conversion equal to 70% for C/Zn and C/ZnO/Zn, while for the ZnO is around 55%. The kinetic of degradation is discussed.

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Authors and Affiliations

  1. Fac de Ciências e Tecnologia — FCT, Univ Estadual Paulista — UNESP, Laboratory of Composites and Ceramics Functional, LaCCeF – C.P. 467, Presidente Prudente, 19060-900, SP, Brazil

    Silvania Lanfredi, Gisele S. Silveira, Bruno S. Potensa & Marcos A. L. Nobre

Authors
  1. Silvania Lanfredi
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  2. Gisele S. Silveira
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  3. Bruno S. Potensa
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  4. Marcos A. L. Nobre
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Lanfredi, S., Silveira, G.S., Potensa, B.S. et al. ZnO/Zn/Amorphous Carbon Matrix Nanostructured Composite Powder: a New Photocatalyst for Dye. MRS Advances 1, 1327–1332 (2016). https://doi.org/10.1557/adv.2015.40

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  • DOI: https://doi.org/10.1557/adv.2015.40

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