Fe2O3-doped SnO2 membranes with enhanced mechanical resistance for ultrafiltration application

Author(s)

Neves, Debora C. O. S. ^[1] ; da Silva, Andre L. ^[1] ; de Oliveira Romano, Roberto Cesar ^[2] ; Gouvea, Douglas ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Met & Mat Engn, Polytech Sch, BR-05508030 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Dept Civil Construct Engn, Polytech Sch, BR-05508030 Sao Paulo - Brazil

• Document type: Journal article
• Source: Journal of the European Ceramic Society; v. 40, n. 15, p. 5959-5966, DEC 2020.
• Web of Science Citations: 0

Abstract

Fe2O3-doped SnO2 ceramic membranes were fabricated by an innovative approach based on interface segregation. The membranes exhibited outstanding mechanical resistance, which was attributed to doping-induced increase in the grain boundary interface area and decrease in the crystallite size. The membranes were sintered at different temperatures from 500 degrees C to 1000 degrees C. Most pore diameters were in the range of 0.01 - 0.1 mu m, and the pore diameters of both doped and undoped membranes could be well controlled by adjusting the sintering temperature without any sacrificial material. The permeability results showed that the membranes could be used for nano-, ultra-, and microfiltration applications. The mechanical resistance of Fe2O3 -doped SnO2 membranes was around three times higher than that of pristine SnO2 membranes. The compressive strength of the doped SnO2 membranes sintered at 1000 degrees C was 26.8 MPa, while that of the undoped membranes was 10.1 MPa. (AU)

• FAPESP's process: 15/50443-1 - Interfaces in ceramic processing
• Grantee: Douglas Gouvêa
• Support Opportunities: Regular Research Grants
• FAPESP's process: 13/23209-2 - Ions segregation onto oxide nanopowders surfaces and the influence on the colloidal processing
• Grantee: Douglas Gouvêa
• Support Opportunities: Regular Research Grants