(1.College of Chemistry and Chemical Engineering，Guangxi Minzu University，Nanning 530008，China；2.Guangxi Colleges and Universities Key Laboratory of Food Safety and Pharmaceutical Analytical Chemistry，Nanning 530008， China)
Abstract：Nano-materials exhibit remarkable size effects due to their unique surface properties and distinct atomic arrangements， leading to significant differences in their physicochemical properties compared to bulk materials. In this study， five nano-FeS2 samples with different particle sizes were synthesized via the solvothermal method， and their electrical conductivities at various temperatures were measured. Based on experimental data， key thermodynamic parameters such as the standard molar dissolution thermodynamic functions， partial molar surface thermodynamic functions， and molar surface thermodynamic functions were theoretically calculated. The results indicate that the obtained thermodynamic functions exhibit a strong linear relationship with both temperature and particle size. This research provides a theoretical foundation for a deeper understanding of the surface thermodynamic properties of nano-FeS2 and offers important guidance for the design and application of nano-materials.
2025, Vol. 59 
