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Journal of Materials Science: Materials in Electronics

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30-01-2020

Synthesis and characterization of α-Ag₂MoO₄/β-Ag₂MoO₄ heterostructure obtained by fast and simple ultrasonic spray pyrolysis method at different temperatures

Authors: E. A. C. Ferreira, N. F. Andrade Neto, A. A. G. Santiago, C. A. Paskocimas, M. R. D. Bomio, F. V. Motta

Published in: Journal of Materials Science: Materials in Electronics | Issue 5/2020

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Abstract

In this work, microspheres of α-Ag₂MoO₄/β-Ag₂MoO₄ were obtained by ultrasonic spray pyrolysis (USP) at temperatures of 400, 500, 600, and 700 °C. Characterizations of X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Fourier-transform infrared spectroscopy (FTIR), Raman scattering, and ultraviolet–visible spectroscopy (UV–Vis) were performed on the samples. The beta phase is present in all samples, while the alpha phase forming α/β-Ag₂MoO₄ appears from 500 to 700 °C. FE-SEM images indicate the tendency of micrometric sphere formation, in which the increase of temperature promotes a smoothing on the surface. The α/β-Ag₂MoO₄ heterostructure was a better photocatalytic performance on methylene blue dye (MB) degradation than the pure beta phase. The MB was 87% reduced by the pure beta phase and 100% reduced by the α/β-Ag₂MoO₄ after 45 min of photocatalysis.

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Title: Synthesis and characterization of α-Ag2MoO4/β-Ag2MoO4 heterostructure obtained by fast and simple ultrasonic spray pyrolysis method at different temperatures
Authors: E. A. C. Ferreira
N. F. Andrade Neto
A. A. G. Santiago
C. A. Paskocimas
M. R. D. Bomio
F. V. Motta
Publication date: 30-01-2020
Publisher: Springer US
Published in: Journal of Materials Science: Materials in Electronics / Issue 5/2020
Print ISSN: 0957-4522
Electronic ISSN: 1573-482X
DOI: https://doi.org/10.1007/s10854-020-02980-0

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