Effect of nanoparticle size on the thermal decomposition thermodynamics in theory and experiment

Critical size effect for the surface heat capacities of nano-CdS: theoretical and experimental studies

“…80 4.3 Influence of particle size on the standard molar dissolution thermodynamic functions 4.3.1 Influence of particle size on the standard molar dissolution Gibbs free energy. Eqn (22) was used to calculate the standard molar dissolution Gibbs free energy of nano-CdS with different particle sizes. The relationships between the standard molar dissolution Gibbs free energy and the reciprocal of particle size are shown in Fig.…”

“…12,13 Due to the difference in surface atomic distribution structure, when the particle size is reduced to the level of a nanometer, it will lead to nanomaterials being compared with those of corresponding bulk materials, the chemical and physical properties would become particularly prominent. [14][15][16] When nanomaterials reacted, such as in adsorption, 17 phase transitions, 18,19 decompositions, [20][21][22] and other processes, the difference mainly depends on the surface thermodynamic properties of nanomaterials. Meanwhile, the surface thermodynamic properties of nanomaterials also affect their activity.…”

Surface thermodynamics of yttrium titanate pyrochlore nanomaterials

“…The consequence is that properties of nanosized particles are often different from their bulk counterparts. [62][63][64][65] From a thermodynamic point of view, the surface region has different thermodynamic parameters, which differ from that of the bulk phase by the excess free surface energy (ΔG surface ) which often contributes endothermically to the thermodynamic stability. As the size of a grain increases from the scale of a single unit cell to a larger grain diameter, the free energy accumulated from the unsatisfied bonds decreases with respect to the bulk material free energy.…”

Theoretical and Experimental Studies on the Critical Size Effect on Surface Heat Capacity Using In Situ Microcalorimetry: During the Solid–Liquid Reactions of Cu2O Nanocubes

“…Finally, they deduced the relationship equation between the constant volume heat capacity and size. In the year 2016, Xue's research group 40 systematically deduced the thermodynamic equations between the constant volume heat capacity and the particle size of nanoparticles with different morphologies by introducing interfacial variables into the Gibbs function of nanoparticles. They derived that the size-influence law of the theoretical equations was consistent with the results of their quantum chemical calculations.…”