Synthesis of Self‐Ordered Tantalum‐Niobium Mixed Oxide Nanotubes and Their Use for Clean Hydrogen Production,ChemNanoMat

当前位置： X-MOL 学术 › ChemNanoMat › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Synthesis of Self‐Ordered Tantalum‐Niobium Mixed Oxide Nanotubes and Their Use for Clean Hydrogen Production
ChemNanoMat ( IF 2.6 ) Pub Date : 2020-08-10 , DOI: 10.1002/cnma.202000371
Nashaat Ahmed ₁ , Ahmed M. Hafez ₁ , Mohamed Salama ₁ , Nageh K. Allam ₁

Affiliation

We report on the first fabrication of vertically‐oriented tantalum‐niobium mixed oxide nanotube arrays (Ta−Nb−O NTs) via one‐step anodization of Ta−Nb alloy sheet in NH₄F‐containing electrolytes. The synthesized Ta−Nb−O NTs were fully characterized via X‐ray diffraction (XRD), field‐emission scanning electron microscopy (FESEM), high‐resolution transmission electron microscopy (HRTEM), and X‐ray photoelectron spectroscopy (XPS). The prepared nanotubes have an average diameter of ∼35 nm with a wall thickness ∼15 nm and a length ∼1.0 μm. The photoactivity of the fabricated Ta−Nb−O NTs was tested toward the photocatalytic hydrogen production, revealing a steady rate with no indication of activity poisoning. The amount of hydrogen produced can be as high as 150 μL/cm² after 5 h of illumination, which is much higher than that reported for most metal oxides. Therefore, the demonstrated platform of Ta−Nb−O nanotube arrays holds promise for a variety of solar energy applications.

中文翻译：

自定序钽铌混合氧化物纳米管的合成及其在清洁制氢中的应用

我们报告了通过在含NH ₄ F的电解质中对Ta-Nb合金薄板进行一步阳极氧化的方法，首次制备了垂直取向的钽铌混合氧化物纳米管阵列（Ta-Nb-O NTs）。合成的Ta-Nb-O NTs通过X射线衍射（XRD），场发射扫描电子显微镜（FESEM），高分辨率透射电子显微镜（HRTEM）和X射线光电子能谱（XPS）进行了全面表征。所制备的纳米管的平均直径约为35 nm，壁厚约为15 nm，长度约为1.0μm。测试了所制造的Ta-Nb-O NTs的光活性，以观察其对光催化制氢的影响，显示出稳定的速率，没有任何活性中毒的迹象。产生的氢气量可能高达150μL/ cm ²光照5小时后，比大多数金属氧化物报告的要高得多。因此，Ta-Nb-O纳米管阵列的演示平台为各种太阳能应用提供了希望。

更新日期：2020-08-10

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11