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Journal of Sol-Gel Science and Technology

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05.06.2018 | Original Paper: Nano-structured materials (particles, fibers, colloids, composites, etc.)

Synthesis, characterization, multifunctional electrochemical (OGR/ORR/SCs) and photodegradable activities of ZnWO₄ nanobricks

verfasst von: Saad M. Alshehri, Jahangeer Ahmed, Tansir Ahamad, Norah Alhokbany, Prabhakarn Arunachalam, Abdullah M. Al-Mayouf, Tokeer Ahmad

Erschienen in: Journal of Sol-Gel Science and Technology | Ausgabe 1/2018

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Abstract

Brick-shaped zinc tungstate nanoparticles have been synthesized by ecofriendly solvent-free process using molten salts. Zinc tungstate nanobricks (ZnWO₄ Nbs) were characterized by powder x-ray diffraction (PXRD), FTIR, Raman, energy dispersive and electron microscopic studies. ZnWO₄ Nbs are used as the multifunctional electrode materials to oxygen generation reactions (OGR), oxygen reduction reactions (ORR) and supercapacitors (SCs) as well as photo-catalysts in the waste-water treatment by the degradation of organic dyes. Low overpotential (ƞ₁₀ = 0.475 V), low tafel slope (140 mV/dec), high current density (~70 mA/cm²) and good stability of the electrodes are the key results of the present studies for water electrolysis (OGR/ORR). ZnWO₄ Nbs have also shown great interest in supercapacitors with efficient charge–discharge activities in 1 M KOH. The specific capacitance and energy density of ZnWO₄ Nbs were found to be 250 F/g and 80 Wh/kg, respectively, at 5 mV/s, these values are relatively higher than that of previously reported specific capacitance and energy density value of metal tungstate nanoparticles. ZnWO₄ Nbs as the photo-catalysts work very significantly for photocatalytic degradation of aqueous MB dye solution (~85 % in 3 h) in neutral medium.

Vorheriger Artikel Correction to: Optimization of process parameters and its effect on structure and morphology of CuO nanoparticle synthesized via the sol−gel technique

Nächster Artikel A cationic surfactant-induced selective etching strategy for the synthesis of organosilica hollow nanospheres

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Titel: Synthesis, characterization, multifunctional electrochemical (OGR/ORR/SCs) and photodegradable activities of ZnWO4 nanobricks
verfasst von: Saad M. Alshehri
Jahangeer Ahmed
Tansir Ahamad
Norah Alhokbany
Prabhakarn Arunachalam
Abdullah M. Al-Mayouf
Tokeer Ahmad
Publikationsdatum: 05.06.2018
Verlag: Springer US
Erschienen in: Journal of Sol-Gel Science and Technology / Ausgabe 1/2018
Print ISSN: 0928-0707
Elektronische ISSN: 1573-4846
DOI: https://doi.org/10.1007/s10971-018-4698-7

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