摘要
纳米材料由于其独特的表面效应和不同的表面原子排列,展现出显著的尺寸效应,其物理化学性质与块体材料有显著差异.通过溶剂热法制备了5个不同粒径的纳米FeS_(2),并测定了其在不同温度下的电导率.基于实验数据理论计算得到了标准摩尔溶解热力学函数、偏摩尔表面热力学函数、摩尔表面热力学函数等关键参数.结果表明:所得的热力学函数与温度和粒径具有良好的线性关系.该研究为深入理解纳米FeS_(2)的表面热力学性质提供了理论依据,对纳米材料的设计与应用具有重要的指导意义.
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-FeS_(2)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-FeS_(2)and offers important guidance for the design and application of nano-materials.
作者
黄铃媚
黄旭东
曾月俊
罗秋妍
黄龙祥
苏奇祥
黄在银
HUANG Lingmei;HUANG Xudong;ZENG Yuejun;LUO Qiuyan;HUANG Longxiang;SU Qixiang;HUANG Zaiyin(College of Chemistry and Chemical Engineering,Guangxi Minzu University,Nanning 530008,China;Guangxi Colleges and Universities Key Laboratory of Food Safety and Pharmaceutical Analytical Chemistry,Nanning 530008,China)
出处
《华中师范大学学报(自然科学版)》
北大核心
2025年第4期585-592,共8页
Journal of Central China Normal University:Natural Sciences
基金
国家自然科学基金项目(22263001,21873022,21573048)
国家级大学生创新创业训练计划项目(202410608003X).
