Abstract
Single crystalline Ca2Ge7O16 nanowires have been synthesized using CaO and GeO2 as the raw materials. Various factors that affect the formation and size of the Ca2Ge7O16 nanowires have been analyzed. The obtained products are characterized by X-ray diffraction, transmission electron microscopy and scanning electron microscopy. The results show that the calcium germanate nanowires are composed of orthorhombic Ca2Ge7O16 phase with the length and diameter of several dozens of micrometers and about 50 nm, respectively. Hydrothermal temperature plays an important role on the formation and growth of the Ca2Ge7O16 nanowires. The formation process of the Ca2Ge7O16 nanowires is initially interpreted according to the shape evolution of the products obtained from different growth conditions.
Highlights
Ternary germanate nanowires have been attracted great attention as important one-dimensional (1D) nanomaterials for the application of electrochemical sensors, optical devices, electron devices and catalysts[1,2,3,4]
The obtained products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and highresolution TEM (HRTEM)
The morphology and size of the Ca2Ge7O16 nanowires are investigated by SEM, TEM and HRTEM
Summary
Ternary germanate nanowires have been attracted great attention as important one-dimensional (1D) nanomaterials for the application of electrochemical sensors, optical devices, electron devices and catalysts[1,2,3,4]. Several kinds of germanate nanowires, such as Zn2GeO4[5,6], PbGeO3[7] and strontium germanate[8] have been reported previously. Different from the amorphous calcium germanate nanowires, crystalline calcium germanate nanowires have been synthesized by a simple hydrothermal process using GeO and Ca(CH COO) ·H O as the raw materials[11]. The cost of Ca(CH COO) ·H O is high which may confine the possible application of calcium germanate nanowires. It is of important significance for the low-cost synthesizing calcium germanate nanowires with single phase. Single crystalline Ca Ge O 2 7 16 nanowires have been synthesized using GeO2 and CaO as the raw materials.
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