Magnetically-extractable hybrid of magnetite, mesoporous silica and titania for the photo-degradation of organic compounds in water.
JORGETTO, Alexandre de Oliveira; MILBRAT, Alexander; SCHNEIDER, José Fabian; LI, Zheng; GIAMMARIA, Guido; SAEKI, Margarida Juri; GIANETI, Thiago Marcelo Ribeiro; LIMA, Giuseppina Pace Pereira; PEDROSA, Valber de Albuquerque; MUL, Guido; CASTRO, Gustavo Rocha de.
JORGETTO, Alexandre de Oliveira; MILBRAT, Alexander; SCHNEIDER, José Fabian; LI, Zheng; GIAMMARIA, Guido; SAEKI, Margarida Juri; GIANETI, Thiago Marcelo Ribeiro; LIMA, Giuseppina Pace Pereira; PEDROSA, Valber de Albuquerque; MUL, Guido; CASTRO, Gustavo Rocha de.
 Abstract: This work addresses the development of a magnetically extractable magnetite-silica-titania photocatalyst to be applied in the degradation of organic compounds in water. MCM-41 silica was successfully deposited on magnetite, providing large surface area for anchoring of TiOx species, and preventing thermally induced conversion of magnetite to hematite. A good correlation between the calculated values and amount of titania deposited on the silica-covered magnetite particles was obtained for a synthesis route involving the treatment of magnetitesilica in boiling ethanolic Ti-precursor solution. Photocatalytic activity in conversion of 4-chlorophenol could only be observed for compositions containing larger than ~50 wt% titania, whereas increasing the titania content did not significantly improve performance. Experiments carried out at pH~3.0 and~7.2 demonstrated the performance is relatively pH-independent. The structure activity-correlation of the materials is briefly discussed. | |
| Applied Surface Science |
| v. 457, p. 121-133 - Ano: 2018 |
| Fator de Impacto: 4,439 |
| http://dx.doi.org/10.1016/j.apsusc.2018.06.218 |  @article={002891530,author = {JORGETTO, Alexandre de Oliveira; MILBRAT, Alexander; SCHNEIDER, José Fabian; LI, Zheng; GIAMMARIA, Guido; SAEKI, Margarida Juri; GIANETI, Thiago Marcelo Ribeiro; LIMA, Giuseppina Pace Pereira; PEDROSA, Valber de Albuquerque; MUL, Guido; CASTRO, Gustavo Rocha de.},title={Magnetically-extractable hybrid of magnetite, mesoporous silica and titania for the photo-degradation of organic compounds in water},journal={Applied Surface Science},note={v. 457, p. 121-133},year={2018}} |
