K-Enriched MoO3 Nanobundles: A Layered Structure with High Electric Conductivity

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• 作者：Zhibin Hu ; Chenggang Zhou ; Minrui Zheng ; Junpeng Lu ; Binni Varghese ; Hansong Cheng ; Chorng-Haur Sow
• 刊名：The Journal of Physical Chemistry C
• 出版年：2012
• 出版时间：February 16, 2012
• 年：2012
• 卷：116
• 期：6
• 页码：3962-3967
• 全文大小：350K
• 年卷期：v.116,no.6(February 16, 2012)
• ISSN：1932-7455

文摘

We present a surprisingly simple procedure to synthesize potassium-intercalated MoO₃ nanobundles with the integrity of the layered structure remaining intact. While the material displays semiconductor-like behavior, dramatic enhancement of the electric conductivity from 10^鈥? S m^鈥? of MoO₃ to 24 S m^鈥? upon potassium uptake was observed. Density functional theory calculations were performed to assist in structural determination and to elucidate the electronic property of the nanobundles. It was found that the K atoms occupy the oxygen vacancy sites in the lattice. The ionization of the K atoms gives rise to the reduction of the adjacent Mo atoms, leading to electron population in the conduction band.