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<p>Bi<sub>2</sub>O<sub>3</sub> nanoparticles (NPs) demonstrate size-dependent interfacial thermodynamic properties that critically determine their performance in various applications, but the quantitative relationship between these fundamental properties and particle size remains poorly understood, limiting their rational design and optimization. In this paper, the theoretical relationships between interfacial thermodynamic properties, respectively, and nanoparticle size were deduced, the influencing mechanisms and regularities between interfacial thermodynamics properties, respectively, and particle size were analyzed. In the experimental section, spherical Bi<sub>2</sub>O<sub>3</sub> NPs with different particle sizes and their corresponding electrodes were prepared. The electrode potentials of Bi<sub>2</sub>O<sub>3</sub> NPs electrodes at different temperatures were determined by electrochemical method, and then the interfacial thermodynamic properties of Bi<sub>2</sub>O<sub>3</sub> NPs were obtained. The experimental results show that particle size effect influence significantly the interfacial thermodynamic properties of nanoparticles. The particle size effect is primarily comprised of the interfacial area effect and the interfacial tension effect. Furthermore, all these interfacial thermodynamic properties exhibit a linear relationship with the reciprocal of particle size when the diameter exceeds 20&#xa0;nm. The experimental results are well in agreement with the theoretical predictions. Understanding the influencing mechanism and regularities of particle size on the interfacial thermodynamic properties of Bi<sub>2</sub>O<sub>3</sub> NPs can provide a theoretical basis and valuable references for the researches and applications of nanomaterials.</p>

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Size-dependent interfacial thermodynamic properties of Bi2O3 nanoparticles studied by electrochemical method

  • 期刊论文

  • 发表日期：

    2025年4月4日

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  • Zuohui Cheng,
  • Huijuan Duan,
  • Jiaxiu Jing,
  • Jinzhong Zhao,
  • Yongqiang Xue,
  • Aijie Yan,
  • Yuebo Yang

摘要

Bi2O3 nanoparticles (NPs) demonstrate size-dependent interfacial thermodynamic properties that critically determine their performance in various applications, but the quantitative relationship between these fundamental properties and particle size remains poorly understood, limiting their rational design and optimization. In this paper, the theoretical relationships between interfacial thermodynamic properties, respectively, and nanoparticle size were deduced, the influencing mechanisms and regularities between interfacial thermodynamics properties, respectively, and particle size were analyzed. In the experimental section, spherical Bi2O3 NPs with different particle sizes and their corresponding electrodes were prepared. The electrode potentials of Bi2O3 NPs electrodes at different temperatures were determined by electrochemical method, and then the interfacial thermodynamic properties of Bi2O3 NPs were obtained. The experimental results show that particle size effect influence significantly the interfacial thermodynamic properties of nanoparticles. The particle size effect is primarily comprised of the interfacial area effect and the interfacial tension effect. Furthermore, all these interfacial thermodynamic properties exhibit a linear relationship with the reciprocal of particle size when the diameter exceeds 20 nm. The experimental results are well in agreement with the theoretical predictions. Understanding the influencing mechanism and regularities of particle size on the interfacial thermodynamic properties of Bi2O3 NPs can provide a theoretical basis and valuable references for the researches and applications of nanomaterials.