Hydrothermal syntheses of tungsten doped TiO2 and TiO2/WO3 composite using metal oxide precursors for charge storage applications

Pal, Bhupender and Vijayan, Bincy Lathakumary and Krishnan, Syam G. and Harilal, Midhun and Basirun, Wan Jefrey and Lowe, Adrian and Yusoff, Mashitah Mohd and Jose, Rajan (2018) Hydrothermal syntheses of tungsten doped TiO2 and TiO2/WO3 composite using metal oxide precursors for charge storage applications. Journal of Alloys and Compounds, 740. pp. 703-710. ISSN 0925-8388

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Official URL: https://doi.org/10.1016/j.jallcom.2018.01.065

Abstract

Synthesis of advanced functional materials through scalable processing routes using greener approaches is essential for process and product sustainability. In this article, syntheses of nanoparticles of titanium dioxide (TiO2), tungsten trioxide (WO3), WO3-doped titanium dioxide (W-TiO2) and TiO2/WO3 composite at hydrothermal conditions using corresponding metal oxide precursors are described. Electrochemical charge storage capabilities of the above materials are measured using cyclic voltammetry, charge-discharge cycling and electrochemical impedance spectroscopy in aqueous KOH electrolyte. The TiO2 and the WO3 nanoparticle showed a specific charge (Q) of ∼12 and ∼36 mA h g−1 at a current density of 2 A g−1 in 6 M KOH, respectively. The Q of TiO2 increased upon W doping up to 25 mA h g−1 for 5 wt% W-TiO2 and the WO3/TiO2 composite showed the highest storage capability (Q ∼40 mA h g−1). Changes in the charge storage capabilities of the doped and composite materials have been correlated to materials properties.

Item Type: Article
Uncontrolled Keywords: Green synthesis; Energy Storage Materials; Renewable energy; Battery type electrode; Supercapacitors
Subjects: Q Science > Q Science (General)
Q Science > QD Chemistry
Divisions: Faculty of Science > Dept of Chemistry
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 24 Apr 2019 03:41
Last Modified: 24 Apr 2019 03:41
URI: http://eprints.um.edu.my/id/eprint/21048

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