Dependence of Photocatalytic Activity of TiO2-SiO2 Nanopowders
Structural properties and chemical composition change the photocatalytic activity in TiO2-SiO2 nanopowder composite. The SiO2-TiO2 nanostructure is synthesized based on sol–gel method. The nanoparticles are characterized by x-ray fluorescents (XRF), x- ray diffraction (XRD), tunneling electron micro...
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| Format: | Article |
| Language: | English |
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Nanoscience and Nanotechnology Research Center, University of Kashan
2014-10-01
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| Series: | Journal of Nanostructures |
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| Online Access: | http://jns.kashanu.ac.ir/article_8488_b376680cbbf13eb7de103d7ee2266992.pdf |
| _version_ | 1818331260416688128 |
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| author | M. Riazian |
| author_facet | M. Riazian |
| author_sort | M. Riazian |
| collection | DOAJ |
| description | Structural properties and chemical composition change the photocatalytic activity in TiO2-SiO2 nanopowder composite. The SiO2-TiO2 nanostructure is synthesized based on sol–gel method. The nanoparticles are characterized by x-ray fluorescents (XRF), x- ray diffraction (XRD), tunneling electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), UV-vis. Spectrophotometer and furrier transmission create infrared absorption (FTIR) techniques. The rate constant k for the degradation of methylen blue in its aqueous solution under UV irradiation is determined as a measure of photocatalytic activity. Dependence between photocatalytic activity and SiO2 content in the composite is determined. Rate constant k is found dependent on the content of SiO2 in the composite that calcined at 900 oC. The addition of low composition SiO2 to the TiO2 matrix (lower than 45%) enhances the photocatalytic activity due to thermal stability and increasing in the surface area. The effects of chemical compositions on the surface topography and the crystallization of phases are studied. |
| first_indexed | 2024-12-13T13:17:01Z |
| format | Article |
| id | doaj.art-393b2e626f554398a3cd2b97dbd13a5c |
| institution | Directory Open Access Journal |
| issn | 2251-7871 2251-788X |
| language | English |
| last_indexed | 2024-12-13T13:17:01Z |
| publishDate | 2014-10-01 |
| publisher | Nanoscience and Nanotechnology Research Center, University of Kashan |
| record_format | Article |
| series | Journal of Nanostructures |
| spelling | doaj.art-393b2e626f554398a3cd2b97dbd13a5c2022-12-21T23:44:30ZengNanoscience and Nanotechnology Research Center, University of KashanJournal of Nanostructures2251-78712251-788X2014-10-014443344110.7508/jns.2014.04.0058488Dependence of Photocatalytic Activity of TiO2-SiO2 NanopowdersM. Riazian0Department of Engineering, Tonekabon branch, Islamic Azad University, Tonekabon, Iran.Structural properties and chemical composition change the photocatalytic activity in TiO2-SiO2 nanopowder composite. The SiO2-TiO2 nanostructure is synthesized based on sol–gel method. The nanoparticles are characterized by x-ray fluorescents (XRF), x- ray diffraction (XRD), tunneling electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), UV-vis. Spectrophotometer and furrier transmission create infrared absorption (FTIR) techniques. The rate constant k for the degradation of methylen blue in its aqueous solution under UV irradiation is determined as a measure of photocatalytic activity. Dependence between photocatalytic activity and SiO2 content in the composite is determined. Rate constant k is found dependent on the content of SiO2 in the composite that calcined at 900 oC. The addition of low composition SiO2 to the TiO2 matrix (lower than 45%) enhances the photocatalytic activity due to thermal stability and increasing in the surface area. The effects of chemical compositions on the surface topography and the crystallization of phases are studied.http://jns.kashanu.ac.ir/article_8488_b376680cbbf13eb7de103d7ee2266992.pdfNanostructurePhotocatalytic activitySiO2-TiO2Sol-gel method |
| spellingShingle | M. Riazian Dependence of Photocatalytic Activity of TiO2-SiO2 Nanopowders Journal of Nanostructures Nanostructure Photocatalytic activity SiO2-TiO2 Sol-gel method |
| title | Dependence of Photocatalytic Activity of TiO2-SiO2 Nanopowders |
| title_full | Dependence of Photocatalytic Activity of TiO2-SiO2 Nanopowders |
| title_fullStr | Dependence of Photocatalytic Activity of TiO2-SiO2 Nanopowders |
| title_full_unstemmed | Dependence of Photocatalytic Activity of TiO2-SiO2 Nanopowders |
| title_short | Dependence of Photocatalytic Activity of TiO2-SiO2 Nanopowders |
| title_sort | dependence of photocatalytic activity of tio2 sio2 nanopowders |
| topic | Nanostructure Photocatalytic activity SiO2-TiO2 Sol-gel method |
| url | http://jns.kashanu.ac.ir/article_8488_b376680cbbf13eb7de103d7ee2266992.pdf |
| work_keys_str_mv | AT mriazian dependenceofphotocatalyticactivityoftio2sio2nanopowders |