Microwave–assisted synthesis of nanoscale tungsten trioxide hydrate with excellent photocatalytic activity under visible irradiation
Yu, Xu–Teng; Liu, Heng–Xin; Shen, Yanhua; Xu, Jian–Ying; Cai, Feng–Ying; Li, Taohai; Lü, Jian; Cao, Wei (2020-07-27)
Xu–Teng Yu, Heng–Xin Liu, Yanhua Shen, Jian–Ying Xu, Feng–Ying Cai, Taohai Li, Jian Lü, Wei Cao, Microwave–assisted synthesis of nanoscale tungsten trioxide hydrate with excellent photocatalytic activity under visible irradiation, Inorganic Chemistry Communications, Volume 120, 2020, 108147, ISSN 1387-7003, https://doi.org/10.1016/j.inoche.2020.108147
© 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/.
https://creativecommons.org/licenses/by-nc-nd/4.0/
https://urn.fi/URN:NBN:fi-fe202102255967
Tiivistelmä
Abstract
Tungsten trioxide hydrate (WO₃⋅1/3H₂O) nanoparticles (NPs) were prepared via a microwave–assisted synthetic pathway by using Na₂WO₄·2H₂O and PdCl₂ as precursors. Microstructure and morphology of as–prepared WO₃⋅1/3H₂O NPs were investigated through X–ray diffraction (XRD), transmission electron microscopy (TEM), and Fourier transform infrared (FT–IR) spectra, while porosity and bandgap through specific surface area and UV–vis absorption spectroscopy. It was found that Pd²⁺ ions played a crucial role in the formation of WO₃⋅1/3H₂O NPs, and thus a possible formation mechanism was proposed based on the growth processes. The photocatalytic property of WO₃⋅1/3H₂O NPs was evaluated on the basis of Rhodamine B (RhB) degradation in aqueous solutions under simulated visible irradiation. Photocatalytic experimental results indicated that as–prepared WO₃⋅1/3H₂O NPs exhibited much more superior photocatalytic activity by contrast to that of the commercial WO₃.
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