Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (07): 938-942.DOI: 10.6023/A1111144 Previous Articles    



范高超a, 黄在银a,b, 陈洁a, 马玉洁a   

  1. a 广西民族大学化学与生态工程学院 南宁 530006;
    b 广西壮族自治区林产化学品开发与应用重点实验室 南宁 530006
  • 投稿日期:2011-11-14 修回日期:2011-12-17 发布日期:2012-03-05
  • 通讯作者: 黄在银
  • 基金资助:

    国家自然科学基金(No. 20963001)、广西自然科学基金(Nos. 0832078, 0991085)和广西区研究生科研创新项目(No. 2011106080817M366)资助.

Impact of Size Effects on the Thermodynamic Properties of Zinc Oxide Micro/nano System

Fan Gaochaoa, Huang Zaiyina,b, Chen Jiea, Ma Yujiea   

  1. a College of Chemistry & Ecological Engineering, Guangxi University for Nationalities, Nanning 530006;
    b Key Laboratory of Forest Chemicals Development and Application of Guangxi Zhuang Autonomous Region, Nanning 530006
  • Received:2011-11-14 Revised:2011-12-17 Published:2012-03-05
  • Supported by:

    Project was supported by the National Natural Science Foundation of China (No. 20963001), Guangxi Natural Science Foundation of China (Nos. 0832078 and 0991085) and Innovation Project of Guangxi Graduate Education (No. 2011106080817M366).

Grenade-like ZnO micro/nano structures with three different sizes were prepared by microemulsion- 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 entropy of themselves increased.

Key words: thermodynamic properties, microcalorimetry, nano ZnO, size effect, microemulsion method