Base-induced phase and morphology evolution of Ta2O5 to Ta-based compound nanostructures: synthesis and characterization

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Science Pub Date : 2025-09-19 DOI:10.1007/s10853-025-11522-0

Pushpalatha Vijayakumar Vaishag, Seongin Hong, Jin-Seo Noh

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引用次数: 0

Abstract

This study investigates the synthesis and characterization of Ta-based compound nanostructures modified from tantalum pentoxide (Ta₂O₅) using base-assisted hydrothermal treatments with NaOH, KOH, and Sr(OH)₂. The morphologies, crystal structures, surface chemistry, optical properties, and electrochemical performance of the resulting materials were analyzed in depth. The KOH treatment produced octahedral KTa₂O₅(OH).nH₂O nanostructures, NaOH yielded cubic NaTaO₃, and Sr(OH)₂ resulted in rod-like Ta₂O₅ with SrTa₂O₆ as secondary phase. The KOH-treated sample exhibited superior hydrophilicity and electrochemical performance for the oxygen evolution reaction (OER) compared to the other samples. This was attributed to the presence of hydroxyl groups, incorporation of K⁺ ions, and improved OH⁻ adsorption. A growth mechanism and structure–property relationships of the base-modified materials were also provided. The results of this study demonstrate how base-assisted treatments can be used to engineer the morphology, structure, and properties of Ta-based compound nanostructures for various applications in catalysis and renewable energy.

Graphical Abstract

查看原文本刊更多论文

碱基诱导的Ta2O5到ta基化合物纳米结构的相和形态演化：合成和表征

本文研究了以NaOH、KOH和Sr(OH)2为辅助水热处理，以五氧化二钽（Ta2O5）为原料，合成并表征了ta基化合物纳米结构。对所制备材料的形貌、晶体结构、表面化学、光学性能和电化学性能进行了深入分析。KOH处理产生八面体KTa2O5（OH）。nH2O纳米结构中，NaOH生成立方NaTaO3， Sr(OH)2生成棒状Ta2O5， SrTa2O6为次级相。与其他样品相比，koh处理后的样品在析氧反应（OER）中表现出优越的亲水性和电化学性能。这是由于羟基的存在、K+离子的掺入和OH -吸附的改善。并给出了基改性材料的生长机理和结构性能关系。本研究的结果表明，碱基辅助处理可以用于设计ta基化合物纳米结构的形态、结构和性能，用于催化和可再生能源的各种应用。图形抽象

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.