野草状纳米氧化锌的制备及标准摩尔生成焓

本文采用反相微乳液法制备了尺寸均匀的野草状ZnO纳米结构. 依据热力学势函数法获得了纳米ZnO与块体ZnO标准摩尔生成焓的关系, 并结合微量热技术求得了所制备产物的标准摩尔生成焓, 为研究其它纳米材料的标准摩尔生成焓提供了一种广泛适用的新方法.

Preparation and Standard Molar Formation Enthalpy of Weed-like ZnO Nanostructures

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 microcalorimetry, 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.