Efficient Preparation of CuGeO3 with Controllable Morphology Using CuCl2 as Copper Source

doi:10.15541/jim20200180

Abstract

Abstract:

Copper germanate has attracted wide attention because of its spin-Peierls transition and excellent lithium storage performance. Typical hydrothermal method uses weak acid salts such as Cu(CH₃COO)₂ to promote the ionization of water to obtain OH ^- required for the growth of CuGeO₃. Although the operation is facile, the reaction time is long and the efficiency is low. In this work, CuCl₂ was used as the copper source instead of Cu(CH₃COO)₂ and the pH of precursor solution was adjusted to control the adsorption capacity of each crystal plane and the supersaturation of the solution, so as to achieve efficient preparation of CuGeO₃ nanorods and CuGeO₃ hexagonal nanosheets, effectively shortening the reaction time to 8 h. Based on this, one-dimensional structure-directing agent ethylenediamine was added to accelerate the reaction process while limiting the two-dimensional planar growth of CuGeO₃, and six different sizes ( 100 nm, 200-300 nm, 350-500 nm, 400-700 nm, 1-2 μm and 1-3 μm) of uniform CuGeO₃ nanowires were efficiently prepared.

Key words: CuGeO₃nanowires, CuCl₂, hydrothermal method, morphology controlled

CLC Number:

TB34

XIAO Yumin, Li Bin, QIN Lizhao, LIN Hua, LI Qing, LIAO Bin. Efficient Preparation of CuGeO₃ with Controllable Morphology Using CuCl₂ as Copper Source[J]. Journal of Inorganic Materials, 2021, 36(1): 69-74.

Figures/Tables 6

Fig. 1 XRD patterns of CGO-pH series samples

Fig. 2 XPS spectra of CGO-pH5 (a) Cu2p; (b) Ge2p; (c) O1s

Fig. 3 FESEM patterns of CGO-pH series samples

Fig. 4 XRD patterns of CGO-En series samples

Fig. 5 FESEM images of CGO-En series samples

Fig. 6 Mechanism illustrations of (a) CGO-pH series samples and (b) CGO-En series samples

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Efficient Preparation of CuGeO₃ with Controllable Morphology Using CuCl₂ as Copper Source

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