高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (5): 1007.doi: 10.7503/cjcu20140062

• 物理化学 • 上一篇    下一篇

花生状微/纳米CaMoO4的表面热力学性质

范高超1,2, 马昭1, 黄在银1,2(), 谭学才1,2, 姚先超1   

  1. 1. 广西民族大学化学化工学院
    2. 广西林产化学与工程重点实验室, 南宁 530006
  • 收稿日期:2014-01-20 出版日期:2014-05-10 发布日期:2014-04-12
  • 作者简介:联系人简介: 黄在银, 男, 教授, 主要从事物理化学和纳米材料的研究. E-mail:hzy210@163.com
  • 基金资助:
    国家自然科学基金(批准号: 20963001, 21273050)资助

Surface Thermodynamic Properties of Micro/nano Peanut-shaped CaMoO4

FAN Gaochao1,2, MA Zhao1, HUANG Zaiyin1,2,*(), TAN Xuecai1,2, YAO Xianchao1   

  1. 1. College of Chemistry and Chemical Engineering
    2. Guangxi Key Laboratory of Chemistry and Engineering of Forest Products,Guangxi University for Nationalities, Nanning 530006, China
  • Received:2014-01-20 Online:2014-05-10 Published:2014-04-12
  • Contact: HUANG Zaiyin E-mail:hzy210@163.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.20963001, 21273050)

摘要:

采用室温反相微乳液法制备了3种不同尺寸的花生状微/纳米CaMoO4. 基于纳米CaMoO4与块体CaMoO4热力学性质的本质差异, 结合化学热力学基本理论及热动力学原理, 推导出纳米CaMoO4摩尔表面热力学函数的关系式. 在此基础上, 采用原位微量热技术获得了花生状微/纳米CaMoO4的摩尔表面热力学函数. 结果表明, 花生状微/纳米CaMoO4的表面热力学性质变化具有尺寸效应, 即随着尺寸的减小, 摩尔表面焓、 摩尔表面Gibbs自由能、 摩尔表面熵均增加.

关键词: 微/纳米CaMoO4, 尺寸效应, 微量热技术, 表面热力学

Abstract:

Mirco/nano peanut-shaped CaMoO4 with three different sizes were prepared via reverse-microemulsion method at room temperature. Based on the essential difference between thermodynamic properties of nano CaMoO4 and bulk CaMoO4, the equations for acquiring molar surface thermodynamic functions of nano CaMoO4 were derived via combining the basic theory of chemical thermodynamics with thermokinetic principle. According to the derived equations, molar surface thermodynamic functions such as molar surface enthalpy, molar surface Gibbs free energy and molar surface entropy of the synthesized peanut-like mirco/nano CaMoO4 were successfully gained by in situ microcalorimetry. The results demonstrated that the size has significant influence on surface thermodynamic properties. Along with the size reducing, the molar surface enthalpy, molar surface Gibbs free energy and molar surface entropy increased.

Key words: Micro/nano CaMoO4, Size effect, Microcalorimetry, Surface thermodynamics

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