Title: Preparation of tungsten trioxide film with mesoporosity by anodisation

Authors: Shizhao Wu; Yuru Li; Jing Gao; Guohua Li; Xiaojuan Wang

Addresses: School of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China ' School of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China ' School of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China ' School of Chemical Engineering; State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, China ' Ningbo Academy of Inspection and Quarantine, Ningbo 315012, China

Abstract: The mesostructured WO₃ film on tungsten was investigated by anodic oxidation in ethylene glycol electrolytes containing low concentrations of ionic liquids (EMim.BF₄, 0.6-1.6 vol. %). The surface structure of the WO₃ film as prepared can be adjusted by changing the time, potential and temperature of anodisation, and the concentration of ILs and water in the electrolyte. The sample was characterised by X-ray diffraction (XRD) and field-emission scanning electron microscope (SEM) respectively. A self-organised mesostructured WO₃ can be obtained under optimised parameters. The mesostructured WO₃ film is arranged in sections of arrays with an average granular diameter of 30 nm.

Keywords: tungsten oxide; anodising; nanostructure; mesoporous; ILs; nanomanufacturing.

DOI: 10.1504/IJNM.2018.093476

International Journal of Nanomanufacturing, 2018 Vol.14 No.3, pp.259 - 267

Received: 16 May 2017
Accepted: 26 Oct 2017
Published online: 26 Jul 2018 *

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