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

Published online by Cambridge University Press:  28 December 2015

Silvania Lanfredi ,
Gisele S. Silveira ,
Bruno S. Potensa  and
Marcos A. L Nobre
Silvania Lanfredi*
Affiliation:
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.
Gisele S. Silveira
Affiliation:
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.
Bruno S. Potensa
Affiliation:
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.
Marcos A. L Nobre
Affiliation:
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.
*
*(Email: [email protected])
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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.

Keywords

amorphouscompositeZn
Type
Articles
Information
MRS Advances , Volume 1 , Issue 19: Nanomaterials and Synthesis , 2016 , pp. 1327 - 1332
Copyright
Copyright © Materials Research Society 2015 

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References

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