Magnetic diatomite(Kieselguhr)/Fe2O3/TiO2 composite as an efficient photo-Fenton system for dye degradation

Author(s)

Barbosa, Isaltino A. ^[1] ; Zanatta, Lucas D. ^[1] ; Espimpolo, Daniela M. ^[1] ; da Silva, Douglas L. ^[1] ; Nascimento, Leandro F. ^[1] ; Zanardi, Fabricio B. ^[1] ; de Sousa Filho, Paulo C. ^{[1, 2]} ; Serra, Osvaldo A. ^[1] ; Iamamoto, Yassuko ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Chem, Av Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP - Brazil

^[2] Univ Estadual Campinas, Inst Chem, UNICAMP, R Monteiro Lobato 270, Post Box 6154, BR-13087970 Campinas, SP - Brazil

• Document type: Journal article
• Source: SOLID STATE SCIENCES; v. 72, p. 14-20, OCT 2017.
• Web of Science Citations: 8

Abstract

We explored the potential use of diatomite/Fe2O3/TiO2 composites as catalysts for heterogeneous photo-Fenton degradation of methylene blue under neutral pH. Such system consists in magnetic solids synthesized by co-precipitation with Fe2+/Fe3+ in the presence of diatomite, followed by impregnation of TiO2. The results showed that the optimal amount of the catalyst was 2.0 g L-1, since aggregation phenomena become significant above this concentration, which decreases the photodegradation activity. The catalyst is highly efficient in the degradation of methylene blue and shows an easy recovery by an external magnetic field. This allows for an effective catalyst reuse without significant loss of activity in catalytic cycles, which is a highly interesting prospect for recyclable dye degradation systems. (C) 2017 Elsevier Masson SAS. All rights reserved. (AU)

• FAPESP's process: 13/01669-1 - Nanostructured phosphors and core@shell systems containing rare earths: applications in biological labeling, lighting, and visualization
• Grantee: Paulo Cesar de Sousa Filho
• Support Opportunities: Scholarships in Brazil - Post-Doctoral