标題：Template-free electrosynthesis of crystalline germanium nanowires from solid germanium oxide in molten CaCl2-NaCl作者：Yin, Huayi; Xiao, Wei; Mao, Xuhui; Wei, Weifeng; Zhu, Hua; Wang, Dihua

來源出版物：ELECTROCHIMICA ACTA 卷：102 期： 頁：369-374 DOI：10.1016/j.electacta.2013.04.026 出版年：JUL 15 2013

摘要：Germanium nano-materials are attractive due to their potential application prospects in electronic, information and energy industry. Herein we report a one-step preparation of crystalline germanium nanowires (Ge-NWs) by direct electrochemical reduction of solid GeO2 in molten CaCl2-NaCl at 600 degrees C with a current efficiency of similar to 86% and an energy consumptions as low as 3.26 kW h (kg Ge)(-1). The cyclic voltammogram of the GeO2-filled cavity electrode shows that the onset electroreduction potential of GeO2 is -1.0 V vs. Ag/Ag+, much more positive than the reduction potential of cations in the melt. The as-prepared Ge-NWs are of high aspect ratio, high purity and good crystallinity according to the XRD, EDX, SEM and TEM characterizations. The present approach provides a simple and short process for the production of Ge-NWs from a cost-affordable germanium precursor (GeO2). The potential applications of the obtained Ge for photodetector and infrared optical window have been also investigated by Raman and FT-IR measurements.

入藏号：WOS:000321481300046

文獻類型：Article

語種：English

作者關鍵詞：Electrosynthesis, Ge nanowires, Molten salt electrochemistry, Solid-state electrochemistry

擴展關鍵詞：DIRECT ELECTROLYTIC REDUCTION; FIELD-EFFECT TRANSISTORS; ELECTROCHEMICAL REDUCTION; 3-PHASE INTERLINES; CALCIUM-CHLORIDE; SILICON NANOWIRES; TUNGSTEN POWDER; SIO2 PELLETS; GROWTH; DIOXIDE

通訊作者地址：汪的華(Wang, Dihua);Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

電子郵件地址：wangdh@whu.edu.cn

地址：

[Yin, Huayi; Xiao, Wei; Mao, Xuhui; Zhu, Hua; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Wei, Weifeng] Cent S Univ, Powder Met Res Inst, Changsha 410083, Hunan, Peoples R China.

[Wang, Dihua] Chinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China.

研究方向：Electrochemistry

ISSN：0013-4686