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

Autor(es)

Lanfredi, Silvana ^[1] ; Silveira, Gisete S. ^[1] ; Potensa, Bruno S. ^[1] ; Nobre, Marcos A. L. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista UNESP, FCT, Lab Composites & Ceram Funct LaCCeF, CP 467, BR-19060900 Presidente Prudente, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MRS ADVANCES; v. 1, n. 19, p. 1327-1332, 2016.
• Citações Web of Science: 0

Resumo

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. (AU)

• Processo FAPESP: 07/03510-9 - Caracterização estrutural de nanopós de óxidos semicondutores ferroelétricos
• Beneficiário: Silvania Lanfredi
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/11189-0 - Desempenho catalítico em função da nanoestruturação de novos catalisadores óxidos a partir do método de spray pirólise
• Beneficiário: Silvania Lanfredi
• Modalidade de apoio: Auxílio à Pesquisa - Regular