Particle size effect of specifically prescribed thermodynamic function of cubic nano-Cu2O
XIAO Biyuan1， TANG Huanfeng1， QIU Jiangyuan1， QIN Fanghong1， WAN Ting1,3， HE Zijun1， LUO Bingqun1， HUANG Zaiyin1,2
1.College of Chemistry and Chemiscal Engineering， Guangxi University for Nationalities， Nanning 530008， China；2.Guangxi Colleges and Universities Key Laboratory of Food Safety and Pharmaceutical Analytical Chemistry， Nanning 530008， China；3.The Sixth Geological Brigade of Hubei Geological Bureau， Xiaogan， Hubei 432000， China
Abstract：The prescribed thermodynamic function of nanomaterials is the intrinsic properties of nanomaterials， and the prescribed thermodynamic functions are different with different particle sizes of nanomaterials. Therefore， it is of great scientific significance to study the variation of the specified thermodynamic function with the particle size for guiding the prediction of the specified thermodynamic function of nanomaterials. In this paper， four cubic nano-Cu2O with a particle size of 40-120 nm was synthesized by liquid phase method. In situ microcalorimetry was used to obtain the prescribed thermodynamics function of the reaction between four nano-Cu2O and HNO3 systems in combination of thermo-chemical cycles， thermodynamic principles and transition state theory. And the effects of different particle sizes on standard molar formation enthalpy， standard molar entropy and standard molar generation Gibbs energy were discussed. Results showed that： all of the standard molar Gibbs energy of formation， the standard molar enthalpy of formation and standard molar entropy of formation increased with decreasing particle size.
2019, Vol. 53 
