摘要
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.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第4期433-438,共6页
Journal of Inorganic Materials
基金
国家大学生创新性实验计划
中国博士后科学基金(20100471030)
国家自然科学基金(21101044)~~
关键词
Cu7Te4
纳米结构
电导率
反应机理
Cu7Te4
nanostructures
electrical conductivities
reaction mechanism
