Seifollahi Bazarjani, Mahdi ; Hojamberdiev, Mirabbos ; Morita, Koji ; Zhu, Gangqiang ; Cherkashinin, Gennady ; Fasel, Claudia ; Herrmann, Thomas ; Breitzke, Hergen ; Gurlo, Aleksander ; Riedel, Ralf (2013)
Visible Light Photocatalysis with c-WO3–x/WO3×H2O Nanoheterostructures In Situ Formed in Mesoporous Polycarbosilane-Siloxane Polymer.
In: Journal of the American Chemical Society, 135 (11)
doi: 10.1021/ja3126678
Article, Bibliographie
Abstract
In recent years, there have been significant efforts to find novel photocatalytic materials with improved properties. Thus, there is an active ongoing search for new materials that can operate at a broad range of wavelengths for photocatalytic reactions. Among photocatalytically active semiconductors, considerable attention has been given to tungsten oxide with a band gap of Eg ≈ 2.6 eV, which provides the opportunity to harvest visible light. In the present work, we report on a one-step synthesis of c-WO3–x/WO3×H2O nanowhiskers dispersed in a hydrolytically stable mesoporous polycarbosilane-siloxane ([−Si(O)CH2−]n) matrix. The as-synthesized nanocomposites possess high photocatalytic activity for the degradation of methylene blue (MB) under visible light irradiation. The enhanced photocatalytic activity is due to (i) the reduction in the electron–hole recombination rate because of the reduced dimensions of nanowhiskers, (ii) more efficient consumption of photogenerated electrons and holes as a result of the high surface-to-bulk-ratio of the nanowhiskers, and (iii) better electron–hole pair separation due to the formation of c-WO3–x/WO3×H2O nanoheterostructures.
| Item Type: | Article |
|---|---|
| Erschienen: | 2013 |
| Creators: | Seifollahi Bazarjani, Mahdi ; Hojamberdiev, Mirabbos ; Morita, Koji ; Zhu, Gangqiang ; Cherkashinin, Gennady ; Fasel, Claudia ; Herrmann, Thomas ; Breitzke, Hergen ; Gurlo, Aleksander ; Riedel, Ralf |
| Type of entry: | Bibliographie |
| Title: | Visible Light Photocatalysis with c-WO3–x/WO3×H2O Nanoheterostructures In Situ Formed in Mesoporous Polycarbosilane-Siloxane Polymer |
| Language: | English |
| Date: | 20 March 2013 |
| Publisher: | ACS Publications |
| Journal or Publication Title: | Journal of the American Chemical Society |
| Volume of the journal: | 135 |
| Issue Number: | 11 |
| DOI: | 10.1021/ja3126678 |
| Abstract: | In recent years, there have been significant efforts to find novel photocatalytic materials with improved properties. Thus, there is an active ongoing search for new materials that can operate at a broad range of wavelengths for photocatalytic reactions. Among photocatalytically active semiconductors, considerable attention has been given to tungsten oxide with a band gap of Eg ≈ 2.6 eV, which provides the opportunity to harvest visible light. In the present work, we report on a one-step synthesis of c-WO3–x/WO3×H2O nanowhiskers dispersed in a hydrolytically stable mesoporous polycarbosilane-siloxane ([−Si(O)CH2−]n) matrix. The as-synthesized nanocomposites possess high photocatalytic activity for the degradation of methylene blue (MB) under visible light irradiation. The enhanced photocatalytic activity is due to (i) the reduction in the electron–hole recombination rate because of the reduced dimensions of nanowhiskers, (ii) more efficient consumption of photogenerated electrons and holes as a result of the high surface-to-bulk-ratio of the nanowhiskers, and (iii) better electron–hole pair separation due to the formation of c-WO3–x/WO3×H2O nanoheterostructures. |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids 11 Department of Materials and Earth Sciences > Material Science > Surface Science 07 Department of Chemistry 07 Department of Chemistry > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie 07 Department of Chemistry > Eduard Zintl-Institut > Physical Chemistry |
| Date Deposited: | 04 Feb 2014 09:02 |
| Last Modified: | 28 Mar 2015 15:26 |
| PPN: | |
| Funders: | Financial support by the priority program “ Adapting surfaces for high temperature applications ” (SPP 1299) of the German Research Foundation (DFG) is greatly acknowledged. , R.R. thanks the Fonds der Chemischen Industrie, Frankfurt, Germany, for continuous financial support. , M.H. is grateful to the Alexander von Humboldt Stifung for a postdoctoral fellowship. |
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