Rational Design of 3D Dendritic TiO2 Nanostructures with Favorable Architectures

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• 作者：Ziqi Sun ; Jung Ho Kim ; Yue Zhao ; Fargol Bijarbooneh ; Victor Malgras ; Youngmin Lee ; Yong-Mook Kang ; Shi Xue Dou
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：December 7, 2011
• 年：2011
• 卷：133
• 期：48
• 页码：19314-19317
• 全文大小：777K
• 年卷期：v.133,no.48(December 7, 2011)
• ISSN：1520-5126

文摘

Controlling the morphology and size of titanium dioxide (TiO₂) nanostructures is crucial to obtain superior photocatalytic, photovoltaic, and electrochemical properties. However, the synthetic techniques for preparing such structures, especially those with complex configurations, still remain a challenge because of the rapid hydrolysis of Ti-containing polymer precursors in aqueous solution. Herein, we report a completely novel approach鈥攖hree-dimensional (3D) TiO₂ nanostructures with favorable dendritic architectures鈥攖hrough a simple hydrothermal synthesis. The size of the 3D TiO₂ dendrites and the morphology of the constituent nano-units, in the form of nanorods, nanoribbons, and nanowires, are controlled by adjusting the precursor hydrolysis rate and the surfactant aggregation. These novel configurations of TiO₂ nanostructures possess higher surface area and superior electrochemical properties compared to nanoparticles with smooth surfaces. Our findings provide an effective solution for the synthesis of complex TiO₂ nano-architectures, which can pave the way to further improve the energy storage and energy conversion efficiency of TiO₂-based devices.