中文摘要：

采用微乳液水热辅助法合成了三种不同尺寸的手榴弹状ZnO微／纳结构．通过设计热化学循环，建立了纳米ZnO与块体ZnO体系热力学性质之间的关系．并结合微量热技术对不同尺寸ZnO微／纳体系的热力学性质进行了计算．结果表明，尺寸效应对微／纳体系热力学性质有显著的影响：随着反应物尺度的减小，体系的标准摩尔反应焓、标准摩尔反应Gibbs自由能、标准摩尔反应熵均降低，而材料自身的标准摩尔生成焓、标准摩尔生成Gibbs自由能、标准摩尔熵均增加．

英文摘要：

Grenade-like ZnO micro/nano structures with three different sizes were prepared by microemul- sion-mediated hydrothermal route. Through designing a thermochemical cycle, the relationship between thermodynamic properties of nano ZnO and bulk ZnO systems was built. Combined with microcalorimetry, thermodynamic properties of the ZnO micro/nano systems with different sizes were calculated. The results revealed that size effect has significant influences on thermodynamic properties of micro/nano systems. Along with the size of reactants decreasing, the standard molar enthalpy of reaction, standard molar Gibbs free energy of reaction and standard molar entropy of reaction of micro/nano systems decreased, but the standard molar enthalpy of formation, standard molar Gibbs free energy of formation and standard molar en- tropy of themselves increased.