摘要
随着纳米科技的快速发展,半导体纳米材料受到了人们的广泛关注.ZnO是一种重要的禁带宽度达3.37 eV的功能性半导体材料,被广泛应用于光电子器件和传感等方面.纳米ZnO的制备和性能研究已有很多报道.众所周知,材料的性能与其自身形貌和尺寸密切相关,因此在合成ZnO纳米材料时,控制其形貌、尺寸就显得十分重要.热力学性质是纳米材料的固有属性.然而,迄今为止,纳米材料热力学在很多方面的研究还相当不完善,尤其是对纳米材料的熵、焓和吉布斯自由能等热力学函数值的研究报道较少.
Weed-like ZnO nanostructures with uniformity in size were prepared by inverse microemulsion.The characterization results revealed that each weed consisted of several nanowires which were about 1 μm in length,40 nm in diameter.On the basis of the known standard molar formation enthalpy of the bulk ZnO,the relationship of standard molar formation enthalpy between nano ZnO and bulk ZnO was obtained by designing a thermochemical cycle according to thermodynamic potential function method.Combined with the microcalori-metry,the standard molar formation enthalpy of the as-achieved weed-like ZnO nanostructures at 298.15 K was calculated as（-315.15±4.99） kJ/mol.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2011年第5期1016-1018,共3页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:20963001)
广西自然科学基金(批准号:0832078
0991085)
广西区研究生科研创新项目(批准号:2010106080817M368)资助
关键词
标准摩尔生成焓
微乳液法
微量热技术
纳米ZNO
热力学势函数法
Standard molar formation enthalpy
Microemulsion method
Microcalorimetry
Nano ZnO
Thermodynamic potential function method
