Novel tree-like WO3 nanoplatelets with very high surface area synthesized by anodization under controlled hydrodynamic conditions
Novel tree-like WO3 nanoplatelets with very high surface area synthesized by anodization under controlled hydrodynamic conditions
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DOI：
10.1016/j.cej.2015.10.069
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发表时间：
2016-02
影响因子：
15.1
通讯作者：
R. Fernández-Domene;R. Sánchez-Tovar;E. Segura-Sanchís;J. García-Antón
中科院分区：
文献类型：
--
作者：
R. Fernández-Domene;R. Sánchez-Tovar;E. Segura-Sanchís;J. García-Antón
在目前的工作中，一个新的WO 3纳米结构已获得通过阳极氧化在H2SO 4/NaF电解液在控制流体动力学条件下使用旋转盘电极（RDE）配置。采用场发射扫描电子显微镜（FE-SEM）、共焦拉曼显微镜和光电化学测试等手段对阳极氧化样品进行了分析。这种新的纳米结构由以树状方式生长的纳米片簇组成，具有非常高的暴露于电解质的表面积，从而显著增强了其光电化学活性。所得结果表明，纳米结构的尺寸和电极表面的百分比覆盖这些纳米结构强烈依赖于旋转速度和电解质的组成。
In the present work, a new WO3nanostructure has been obtained by anodization in a H2SO4/NaF electrolyte under controlled hydrodynamic conditions using a Rotating Disk Electrode (RDE) configuration. Anodized samples were analyzed by means of Field Emission Scanning Electronic Microscopy (FE-SEM), Confocal Raman Microscopy and photoelectrochemical measurements. The new nanostructure, which consists of nanoplatelets clusters growing in a tree-like manner, presents a very high surface area exposed to the electrolyte, leading to an outstanding enhancement of its photoelectrochemical activity. Obtained results show that the size of nanostructures and the percentage of electrode surface covered by these nanostructures depend strongly on the rotation velocity and the electrolyte composition.