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Author: search.filters.author.Buddeesao, MiranteeSubject: search.filters.subject.Semiconductors

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    Item type:Publication,
    Structural, optical and electrochemical performances of undoped and Sn2+-doped Bi2Te3 nanoparticles on WO3 electrodes
    (2020-01-01)
    Buddeesao, Mirantee
    ;
    Raknual, Duanghatai
    ;
    Tubtimtae, Auttasit
    ;
    Vailikhit, Veeramol
    ;
    Teesetsopon, Pichanan
    A facile synthesis approach was used to prepare Sn<sup>2+</sup>-doped Bi<inf>2</inf>Te<inf>3</inf> nanospheres on a WO<inf>3</inf> electrode, and the pseudo-capacitive property was measured for samples prepared with optimum parameters. SEM micrographs revealed that after the Sn<sup>2+</sup> doping, the morphology of Bi<inf>2</inf>Te<inf>3</inf> changed from aggregated or network-like nanoparticles to smaller nanospheres with a homogeneous distribution. The X-ray diffraction pattern showed rhombohedral Bi<inf>2</inf>Te<inf>3</inf> coated on the WO<inf>3</inf> electrode. Due to the more abundant electro-active sites and charge carriers that diffused through the electrolyte to the working electrode, the Sn<sup>2+</sup>-doped Bi<inf>2</inf>Te<inf>3</inf> electrode displayed the highest specific capacity of 41.4 mAh/g at a scan rate 10 mV/s, a power density of 0.63 kW/kg, an energy density of 24.5 Wh/kg, and an LSV breakdown potential of 0.26 V. These materials may be applied in potential pseudo-capacitors and in further energy storage devices.