Biswaranjan D. Mohapatra, and , Grzegorz Dariusz Sulka*,
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引用次数: 0
Abstract
Anodization of transition metals, particularly the valve metals (V, W, Ti, Ta, Hf, Nb, and Zr) and their alloys, has emerged as a powerful tool for controlling the morphology, purity, and thickness of oxide nanostructures. The present review is focused on the advances in the synthesis of micro/nanostructures of anodic tantalum oxides (ATO) in inorganic, organic, and mixed inorganic–organic type electrolytes with critically highlighting anodization parameters, such as applied voltage, current, time, and electrolyte temperature. Particularly, the growth of ATO nanostructures in fluoride containing electrolytes and their applications are briefly covered. The details of the current– or voltage–time transient and its relation to the growth of the anodic oxide films are presented systematically. The main discussion revolves around the incorporation of various electrolyte species into the surface of ATO structures and its effects on their physicochemical properties. The latest progress in understanding the growth mechanism of nanoporous/nanotubular ATO structures is outlined. Additionally, the impact of annealing temperature (ranging from 400–1000 °C) and atmosphere on the crystalline structure, morphology, impurity content, and physical properties of the ATOs is briefly described. The common modification methods, such as decorating with other transition metal/metal oxide, heteroatom doping, or generating defects in the ATO structures, are discussed. Besides, the review also covers the most promising applications of these materials in the fields of capacitors, supercapacitors, memristive devices, corrosion protection, photocatalysis, photoelectrochemical (PEC) water splitting, and biomaterials. Finally, future research directions for designing ATO-based nanomaterials and their utilities are indicated.
过渡金属,特别是阀金属(V、W、Ti、Ta、Hf、Nb 和 Zr)及其合金的阳极氧化已成为控制氧化物纳米结构的形态、纯度和厚度的有力工具。本综述主要介绍了在无机、有机和无机有机混合型电解质中合成阳极钽氧化物(ATO)微/纳米结构的进展,并重点介绍了阳极氧化参数,如施加电压、电流、时间和电解质温度。特别是简要介绍了 ATO 纳米结构在含氟电解质中的生长及其应用。系统地介绍了电流或电压-时间瞬态的细节及其与阳极氧化物薄膜生长的关系。主要讨论围绕着各种电解质物种融入 ATO 结构表面及其对其物理化学特性的影响。概述了在理解纳米多孔/纳米管状 ATO 结构的生长机制方面取得的最新进展。此外,还简要介绍了退火温度(400-1000 °C)和气氛对 ATO 晶体结构、形态、杂质含量和物理性质的影响。此外,还讨论了常见的改性方法,如用其他过渡金属/金属氧化物装饰、掺杂杂原子或在 ATO 结构中产生缺陷。此外,综述还涵盖了这些材料在电容器、超级电容器、记忆器件、腐蚀防护、光催化、光电化学(PEC)水分离和生物材料等领域最有前景的应用。最后,还指出了设计 ATO 基纳米材料及其应用的未来研究方向。
期刊介绍:
ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.