Open AccessDetermination of thermodynamic parameters of nanocalcium molybdate reaction system by microcalorimetry
Author(s) -
Fan Gaochao,
Huang Zaiyin
Publication year - 2013
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2013.0427
Subject(s) - isothermal microcalorimetry , molybdate , chemistry , thermodynamics , inorganic chemistry , enthalpy , physics
Calcium molybdate (CaMoO 4 ) 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 (Δ r H m θ ), standard molar activation Gibbs free energy of reaction (Δ r ≠ G m θ ), standard molar activation enthalpy of reaction (Δ r ≠ H m θ ) and standard molar activation entropy of reaction (Δ r ≠ S m θ ) were successfully acquired by applying microcalorimetry. The significant differences of the thermodynamic parameters between nanoCaMoO 4 and bulk CaMoO 4 reaction systems are also discussed and the reason can be rooted in the surface effect of nanomaterials.