Mesoporous Titanium Dioxide (TiO2) with hierarchically 3D dendrimeric architectures: Formation mechanism and highly enhanced photocatalytic activity

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Abstract

Mesoporous TiO with a hierarchically 3D dendrimeric nanostructure comprised of nanoribbon building units has been synthesized via a spontaneous self-formation process from various titanium alkoxides. These hierarchically 3D dendrimeric architectures can be obtained by a very facile, template-free method, by simply dropping a titanium butoxide precursor into methanol solution. The novel configuration of the mesoporous TiO nanostructure in nanoribbon building units yields a high surface area. The calcined samples show significantly enhanced photocatalytic activity and degradation rates owing to the mesoporosity and their improved crystallinity after calcination. Furthermore, the 3D dendrimeric architectures can be preserved after phase transformation from amorphous TiO to anatase or rutile, which occurs during calcination. In addition, the spontaneous self-formation process of mesoporous TiO with hierarchically 3D dendrimeric architectures from the hydrolysis and condensation reaction of titanium butoxide in methanol has been followed by in situ optical microscopy (OM), revealing the secret on the formation of hierarchically 3D dendrimeric nanostructures. Moreover, mesoporous TiO nanostructures with similar hierarchically 3D dendrimeric architectures can also be obtained using other titanium alkoxides. The porosities and nanostructures of the resultant products were characterized by SEM, TEM, XRD, and N adsorption-desorption measurements. The present work provides a facile and reproducible method for the synthesis of novel mesoporous TiO nanoarchitectures, which in turn could herald the fabrication of more efficient photocatalysts.
Original languageEnglish
Pages (from-to)252-262
Number of pages11
JournalJournal of Colloid and Interface Science
Volume394
Issue number1
DOIs
Publication statusPublished - 15 Mar 2013

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Titanium dioxide
Nanostructures
Titanium
Nanoribbons
Carbon Nanotubes
Calcination
Methanol
Condensation reactions
Photocatalysts
Optical microscopy
Hydrolysis
Desorption
Porosity
Phase transitions
titanium dioxide
Transmission electron microscopy
Adsorption
Fabrication
Degradation
Scanning electron microscopy

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title = "Mesoporous Titanium Dioxide (TiO2) with hierarchically 3D dendrimeric architectures: Formation mechanism and highly enhanced photocatalytic activity",
abstract = "Mesoporous TiO with a hierarchically 3D dendrimeric nanostructure comprised of nanoribbon building units has been synthesized via a spontaneous self-formation process from various titanium alkoxides. These hierarchically 3D dendrimeric architectures can be obtained by a very facile, template-free method, by simply dropping a titanium butoxide precursor into methanol solution. The novel configuration of the mesoporous TiO nanostructure in nanoribbon building units yields a high surface area. The calcined samples show significantly enhanced photocatalytic activity and degradation rates owing to the mesoporosity and their improved crystallinity after calcination. Furthermore, the 3D dendrimeric architectures can be preserved after phase transformation from amorphous TiO to anatase or rutile, which occurs during calcination. In addition, the spontaneous self-formation process of mesoporous TiO with hierarchically 3D dendrimeric architectures from the hydrolysis and condensation reaction of titanium butoxide in methanol has been followed by in situ optical microscopy (OM), revealing the secret on the formation of hierarchically 3D dendrimeric nanostructures. Moreover, mesoporous TiO nanostructures with similar hierarchically 3D dendrimeric architectures can also be obtained using other titanium alkoxides. The porosities and nanostructures of the resultant products were characterized by SEM, TEM, XRD, and N adsorption-desorption measurements. The present work provides a facile and reproducible method for the synthesis of novel mesoporous TiO nanoarchitectures, which in turn could herald the fabrication of more efficient photocatalysts.",
author = "Xiaoyun Li and L.-H. Chen and J.C. Rooke and Z. Deng and Z.-Y. Hu and S.-Z. Wang and L. Wang and Y. Li and A. Krief and B.-L. Su",
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T1 - Mesoporous Titanium Dioxide (TiO2) with hierarchically 3D dendrimeric architectures: Formation mechanism and highly enhanced photocatalytic activity

AU - Li, Xiaoyun

AU - Chen, L.-H.

AU - Rooke, J.C.

AU - Deng, Z.

AU - Hu, Z.-Y.

AU - Wang, S.-Z.

AU - Wang, L.

AU - Li, Y.

AU - Krief, A.

AU - Su, B.-L.

PY - 2013/3/15

Y1 - 2013/3/15

N2 - Mesoporous TiO with a hierarchically 3D dendrimeric nanostructure comprised of nanoribbon building units has been synthesized via a spontaneous self-formation process from various titanium alkoxides. These hierarchically 3D dendrimeric architectures can be obtained by a very facile, template-free method, by simply dropping a titanium butoxide precursor into methanol solution. The novel configuration of the mesoporous TiO nanostructure in nanoribbon building units yields a high surface area. The calcined samples show significantly enhanced photocatalytic activity and degradation rates owing to the mesoporosity and their improved crystallinity after calcination. Furthermore, the 3D dendrimeric architectures can be preserved after phase transformation from amorphous TiO to anatase or rutile, which occurs during calcination. In addition, the spontaneous self-formation process of mesoporous TiO with hierarchically 3D dendrimeric architectures from the hydrolysis and condensation reaction of titanium butoxide in methanol has been followed by in situ optical microscopy (OM), revealing the secret on the formation of hierarchically 3D dendrimeric nanostructures. Moreover, mesoporous TiO nanostructures with similar hierarchically 3D dendrimeric architectures can also be obtained using other titanium alkoxides. The porosities and nanostructures of the resultant products were characterized by SEM, TEM, XRD, and N adsorption-desorption measurements. The present work provides a facile and reproducible method for the synthesis of novel mesoporous TiO nanoarchitectures, which in turn could herald the fabrication of more efficient photocatalysts.

AB - Mesoporous TiO with a hierarchically 3D dendrimeric nanostructure comprised of nanoribbon building units has been synthesized via a spontaneous self-formation process from various titanium alkoxides. These hierarchically 3D dendrimeric architectures can be obtained by a very facile, template-free method, by simply dropping a titanium butoxide precursor into methanol solution. The novel configuration of the mesoporous TiO nanostructure in nanoribbon building units yields a high surface area. The calcined samples show significantly enhanced photocatalytic activity and degradation rates owing to the mesoporosity and their improved crystallinity after calcination. Furthermore, the 3D dendrimeric architectures can be preserved after phase transformation from amorphous TiO to anatase or rutile, which occurs during calcination. In addition, the spontaneous self-formation process of mesoporous TiO with hierarchically 3D dendrimeric architectures from the hydrolysis and condensation reaction of titanium butoxide in methanol has been followed by in situ optical microscopy (OM), revealing the secret on the formation of hierarchically 3D dendrimeric nanostructures. Moreover, mesoporous TiO nanostructures with similar hierarchically 3D dendrimeric architectures can also be obtained using other titanium alkoxides. The porosities and nanostructures of the resultant products were characterized by SEM, TEM, XRD, and N adsorption-desorption measurements. The present work provides a facile and reproducible method for the synthesis of novel mesoporous TiO nanoarchitectures, which in turn could herald the fabrication of more efficient photocatalysts.

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