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Acta Chimica Sinica >

2012 , Vol. 70 >Issue 07: 938 - 942

DOI: https://doi.org/10.6023/A1111144

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

  • Fan Gaochao ,
  • Huang Zaiyin ,
  • Chen Jie ,
  • Ma Yujie
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  • 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 date: 2011-11-14

  Revised date: 2011-12-17

  Online 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).

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Abstract

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

Cite this article

Fan Gaochao , Huang Zaiyin , Chen Jie , Ma Yujie . Impact of Size Effects on the Thermodynamic Properties of Zinc Oxide Micro/nano System[J]. Acta Chimica Sinica, 2012 , 70(07) : 938 -942 . DOI: 10.6023/A1111144

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