采用溶剂热法在不同溶剂中(二正丙胺、丙酮和环己酮)分别制备了不同形貌的Cu7Te4纳米结构,包括厚度为200 nm,长度达几十微米的纳米带、粒径为10～25 nm的纳米粒子和由约10 nm的纳米粒子聚集构成的微米片,并使用XRD、SEM、TEM和HRTEM等测试手段对其进行了表征.此外,在室温到400℃范围内测试了三种形貌样品的电导率随温度的变化曲线,研究表明,在相同的测试条件下,由Cu7Te4纳米带制备的块体材料的电导率显著高于另外两种形貌样品.最后,对反应机理和三种溶剂环境对产物形貌的影响进行了探讨.%Cu7Te4 nanomaterials with different morphologies including nanobelts with the thickness of 200 nm and the length of several microns, nanoparticles with the diameter of 10-25 nm and micro-flakes consisting of nano par-ticles with the size of about 10 nm were successfully synthesized using different organic solvents (N,N-Dipropylamine, acetone and cyclohexanone) by a solvothermal process. X-ray powder diffraction (XRD), scanning electron micro-scope (SEM), transmission electron microscope (TEM) and high-resolution transmission electron microscope (HRTEM) were employed to characterize the as-obtained products. Furthermore, the electrical conductivities of the samples were studied between room temperature and 400℃. The results reveal that the electrical conductivity of Cu7Te4 nanobelts is much higher than that of the other two samples with different morphologies. The possible mecha-nism and the influence of various solvents on the morphology of products are also discussed.
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