Isopropanol assisted preparation of α-Al2O3 nanoparticles and its surface charge investigation

IF 3.4 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Solid State Sciences Pub Date : 2024-09-18 DOI:10.1016/j.solidstatesciences.2024.107706
Meng-Jie Cui , Imran Muhammad , Jian Feng , Tie-Zhen Ren
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Abstract

The crystal and particle size distribution of α-alumina (α-Al2O3) nanoparticles is increasingly important for their potential application. However, it is difficult to produce α-Al2O3 nanoparticles due to the high activation energy barrier making it difficult to obtain a pure α-Al₂O₃. In this paper, α-Al2O3 nanoparticles with an average size of 60 nm in width and about 100–300 nm in length were prepared using isopropanol through thermal treatment at 1200 °C, accompanied by a minor fraction of the θ phase. Addressing the challenge of achieving pure phase α-Al2O3, Density Functional Theory (DFT) calculation was conducted to explore the energy landscape similarity between the θ and α crystal phases. The results provided valuable insights into obstacles associated with obtaining pure α-Al2O3, enlightening the relationship between surface electronegativity and crystal phases. Furthermore, X-ray Photoelectron Spectroscopy and electrochemical tests were employed to demonstrate that the α phase could enhance the surface electronegativity of Al2O3. This comprehensive study not only encompasses the synthesis of Al2O3 nanoparticles but also elucidates the distinctions between α and θ phases. These results offer valuable insights into methods optimizing for the synthesis of pure phase α-Al₂O₃.

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异丙醇辅助制备α-Al2O3 纳米粒子及其表面电荷研究
α-氧化铝(α-Al2O3)纳米粒子的晶体和粒度分布对其潜在应用越来越重要。然而,由于活化能势垒较高,很难制备出纯的α-Al₂O₃,因此很难制备出α-Al2O3 纳米粒子。本文使用异丙醇在 1200 °C 下进行热处理,制备了平均尺寸为宽 60 nm、长约 100-300 nm 的 α-Al2O3 纳米粒子,同时制备了少量的 θ 相。为了应对实现纯相 α-Al2O3 的挑战,研究人员进行了密度泛函理论(DFT)计算,以探索 θ 和 α 晶相之间的能谱相似性。计算结果对获得纯净 αAl2O3 的相关障碍提供了宝贵的见解,并揭示了表面电负性与晶相之间的关系。此外,通过 X 射线光电子能谱和电化学测试,证明了 α 相可以提高 Al2O3 的表面电负性。这项综合研究不仅涵盖了 Al2O3 纳米粒子的合成,还阐明了 α 相与 θ 相之间的区别。这些结果为优化合成纯相 α-Al₂O₃ 的方法提供了宝贵的见解。
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来源期刊
Solid State Sciences
Solid State Sciences 化学-无机化学与核化学
CiteScore
6.60
自引率
2.90%
发文量
214
审稿时长
27 days
期刊介绍: Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.
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