Novel tree-like WO3 nanoplatelets with very high surface area synthesized by anodization under controlled hydrodynamic conditions

被引：31
作者：
Fernandez-Dornene, R. M. [1 ]
Sanchez-Tovar, R. [1 ]
Segura-Sanchis, E. [1 ]
Garcia-Anton, J. [1 ]
机构：
[1] Univ Politecn Valencia, IEC, Dept Ingn Quim & Nucl, ETSI Ind, E-46022 Valencia, Spain
来源：
CHEMICAL ENGINEERING JOURNAL | 2016年 / 286卷
关键词：
WO3; nanostructures; Acid electrolytes; Anodization; Hydrodynamic conditions; Water splitting; NANOSTRUCTURED TUNGSTEN-OXIDE; ANNEALING TEMPERATURE; ANODIC FORMATION; THIN-FILMS; TITANIUM; SUBSTRATE; GROWTH;
D O I：
10.1016/j.cej.2015.10.069
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In the present work, a new WO3 nanostructure 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 (FESEM), 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. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：59 / 67
页数：9
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