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Enhanced photocatalytic activities of TiO<inf>2</inf>-SiO<inf>2</inf> nanohybrids immobilized on cement-based materials for dye degradation

Jafari, Hoda, Afshar, Shahrara, Zabihi, Omid and Naebe, Minoo 2016, Enhanced photocatalytic activities of TiO2-SiO2 nanohybrids immobilized on cement-based materials for dye degradation, Research on chemical intermediates, vol. 42, no. 4, pp. 2963-2978, doi: 10.1007/s11164-015-2190-3.

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Title Enhanced photocatalytic activities of TiO2-SiO2 nanohybrids immobilized on cement-based materials for dye degradation
Author(s) Jafari, Hoda
Afshar, Shahrara
Zabihi, Omid
Naebe, Minoo
Journal name Research on chemical intermediates
Volume number 42
Issue number 4
Start page 2963
End page 2978
Total pages 16
Publisher Springer
Place of publication Amsterdam, The Netherlands
Publication date 2016-04-01
ISSN 0922-6168
1568-5675
Keyword(s) TiO2-SiO2 nanohybrid
Photocatalyst
Cementitious materials
Organic dyes
Summary Using cement-based material as a matrix for photocatalytic hybrids is an important development for the large-scale application of photocatalytic technologies. In this work, photocatalytic activity of nanosized hybrids of TiO2/SiO2 (nano-TiO2-SiO2) for degradation of some organic dyes on cementitious materials was highlighted. For this purpose, an optimal inorganic sol-gel precursor was firstly applied to prepare the composites of nano-TiO2-SiO2 which was characterized by XRD, SEM and UV-Vis. Then, a thin layer was successfully coated on white Portland cement (WPC) blocks using a dipping process in a nano-TiO2-SiO2 solution. The effect of nano-TiO2-SiO2-coated WPC blocks on photocatalytic decomposition of three dyes, including Malachite green oxalate (MG), Methylene blue (MB) and Methyl orange (MO) were studied under UV irradiation and monitored by chemical oxygen demand tests. The results showed an increase in photocatalytic effects which depends on the structure and pH of the applied cement.
Language eng
DOI 10.1007/s11164-015-2190-3
Field of Research 030699 Physical Chemistry not elsewhere classified
030699 Physical Chemistry not elsewhere classified
Socio Economic Objective 970103 Expanding Knowledge in the Chemical Sciences
HERDC Research category C2 Other contribution to refereed journal
ERA Research output type C Journal article
Copyright notice ©2016, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30087760

Document type: Journal Article
Collection: Institute for Frontier Materials
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