Design of porous silica supported tantalum oxide hollow spheres showing enhanced photocatalytic activity

Silica-supported tantalum oxide (ST) hollow spheres were designed for photocatalytic applications in the UV range of 4.1 to 4.8 eV. These nanostructures with a variable diameter of 100-250 nm and shell thickness of 24-58 nm were obtained by the hydrothermal treatment of tantalum isopropoxide and tet...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 30(2014), 11 vom: 25. März, Seite 3199-208
1. Verfasser: Sharma, Manu (VerfasserIn)
Weitere Verfasser: Das, Debashree, Baruah, Arabinda, Jain, Archana, Ganguli, Ashok K
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2014
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Cetrimonium Compounds Oxides Tantalum 6424HBN274 Silicon Dioxide 7631-86-9 Ammonia 7664-41-7 mehr... tantalum oxide OEZ64Z53M4 Cetrimonium Z7FF1XKL7A
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520 |a Silica-supported tantalum oxide (ST) hollow spheres were designed for photocatalytic applications in the UV range of 4.1 to 4.8 eV. These nanostructures with a variable diameter of 100-250 nm and shell thickness of 24-58 nm were obtained by the hydrothermal treatment of tantalum isopropoxide and tetraethylorthosilicate at 120 °C for 48 h in the presence of cetyl trimethyl ammonium bromide, which was used as a capping agent. The maximum observed surface area was found to be 610 m(2)/g and pore size distribution of ST hollow spheres varied from 13.4 to 19.0 nm. Lewis acidity of silica and the contact area between SiO2 and Ta2O5 plays a crucial role in controlling the photocatalytic properties of the ST hollow spheres. We observe a remarkable 6× enhancement in the photoactivity of silica-supported tantalum oxide hollow spheres compared to pure Ta2O5 
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700 1 |a Das, Debashree  |e verfasserin  |4 aut 
700 1 |a Baruah, Arabinda  |e verfasserin  |4 aut 
700 1 |a Jain, Archana  |e verfasserin  |4 aut 
700 1 |a Ganguli, Ashok K  |e verfasserin  |4 aut 
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