Determination of thermodynamic parameters of nanocalcium molybdate reaction system by microcalorimetry

作者：Fan, Gaochao^*; Huang, Zaiyin

来源：Micro & Nano Letters, 2013, 8(9): 541-543.

DOI：10.1049/mnl.2013.0427

• calcium compounds
• calorimetry
• enthalpy
• entropy
• free energy
• heat of reaction
• nanofabrication
• nanorods
• thermodynamic parameters
• nanocalcium molybdate reaction system
• microcalorimetry
• calcium molybdate nanorods
• facile reverse-microemulsion method
• thermodynamic theory
• thermokinetic theory
• standard molar activation Gibbs free energy of reaction
• standard molar activation enthalpy of reaction
• standard molar activation entropy of reaction
• surface effect
• CaMoO4
• nanomaterials

Calcium molybdate (CaMoO4) nanorods with uniform size were harvested by a gentle and facile reverse-microemulsion method. Each of the prepared nanorods was about 250 nm in length and 80 nm in diameter. By combining thermodynamic and thermokinetic theories, thermodynamic parameters of the nanoCaMoO(4) reaction system such as standard molar enthalpy of reaction (H-r(m)), standard molar activation Gibbs free energy of reaction ((r)G(m)), standard molar activation enthalpy of reaction (H-r(m)) and standard molar activation entropy of reaction (S-r(m)) were successfully acquired by applying microcalorimetry. The significant differences of the thermodynamic parameters between nanoCaMoO(4) and bulk CaMoO4 reaction systems are also discussed and the reason can be rooted in the surface effect of nanomaterials.

• 出版日期2013-9
• 单位广西民族大学