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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Magnetically-extractable hybrid of magnetite, mesoporous silica and titania for the photo-degradation of organic compounds in water

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Author(s):
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Jorgetto, Alexandre de Oliveira [1, 2] ; Milbrat, Alexander [2] ; Schneider, Jose Fabian [3] ; Li, Zheng [2] ; Giammaria, Guido [4] ; Saeki, Margarida Juri [1] ; Ribeiro Gianeti, Thiago Marcelo [5] ; Pereira Lima, Giuseppina Pace [1] ; Pedrosa, Valber de Albuquerque [1] ; Mul, Guido [2] ; de Castro, Gustavo Rocha [1]
Total Authors: 11
Affiliation:
[1] Univ Estadual Paulista UNESP, Dept Quim & Bioquim, IB, Caixa Postal 510, BR-18618000 Botucatu, SP - Brazil
[2] Univ Twente, Fac Sci & Technol, MESA Inst Nanotechnol, Photocatalyt Synth Grp, Meander 229, POB 217, NL-7500 AE Enschede - Netherlands
[3] Univ Sao Paulo, IFSC, BR-13566590 Sao Carlos, SP - Brazil
[4] Univ Twente, Fac Sci & Technol, MESA, Catalyt Proc & Mat, POB 217, NL-7500 AE Enschede - Netherlands
[5] Univ Estadual Paulista UNESP, Lab Cent, FCA, Caixa Postal 1780, BR-18610307 Botucatu, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Applied Surface Science; v. 457, p. 121-133, NOV 1 2018.
Web of Science Citations: 1
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 magnetite-silica in boiling ethanolic Ti-precursor solution. Photocatalytic activity in conversion of 4-chlorophenol could only be observed for compositions containing larger than similar to 50 wt% titania, whereas increasing the titania content did not significantly improve performance. Experiments carried out at pH similar to 3.0 and similar to 7.2 demonstrated the performance is relatively pH-independent. The structure activity-correlation of the materials is briefly discussed. (AU)

FAPESP's process: 15/05224-0 - Synthesis of silica-titania and silica-titania-magnetite hybrids and their functionalization and sensitization with Fe3+ ions for the photodegradation of 4-chlorophenol under UV and visible light
Grantee:Alexandre de Oliveira Jorgetto
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 13/22955-2 - Synthesis of silica-titania and silica-titania-magnetite hybrids and their functionalization and sensitization with Fe3+ ions for the photodegradation of 4-chlorophenol under UV and visible light
Grantee:Alexandre de Oliveira Jorgetto
Support Opportunities: Scholarships in Brazil - Doctorate