Effect of Cation Intercalation on the Growth of Hexagonal WO3 Nanorods

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• 作者：Li Chen ; Saiwei Lam ; Qinghua Zeng ; Rose Amal ; Aibing Yu
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：May 31, 2012
• 年：2012
• 卷：116
• 期：21
• 页码：11722-11727
• 全文大小：303K
• 年卷期：v.116,no.21(May 31, 2012)
• ISSN：1932-7455

文摘

The growth mechanism of hexagonal tungsten oxide (h-WO₃) nanorods is investigated using molecular dynamics simulation. The results show that cation intercalation has a great impact on the formation of h-WO₃ nanorods, reflected from the attractive interaction between the growth species (polytungstate anion, W₁₀O₃₂^{4鈥?/sup>) and crystal faces of (001) and (100). In particular, an appropriate amount of intercalated cations not only accelerate the crystal growth but also induce the formation of one-dimensional nanostructure of h-WO₃ nanorods along the direction of [001]. An excess of intercalated cations would be unfavorable to the evolution of rod shape. Ammonium ion (NH₄+) is found to be the most stable in a hexagonal tunnel, hence being effective in inducing the 1D morphology of h-WO₃. The main findings from the simulations are also verified by experiments.}