Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7888074 | Ceramics International | 2018 | 21 Pages |
Abstract
We studied the molar ratio effects of niobium and potassium precursors on the structure and morphology of potassium niobate powders prepared via microwave-assisted hydrothermal synthesis (MaHS). KNbO3 nanostructures in the form of nanotowers and nanocubes were obtained at reduced synthesis times (30-240Â min). The products were characterized via XRD, Raman spectroscopy, SEM, and TEM; band gap calculations used diffuse reflectance data. The results indicate that KNbO3 nanostructures were obtained with crystallite sizes ranging from 33 to 52Â nm. An orthorhombic crystalline structure was formed from the increase of KOH at a molar ratio Nb2O5:KOH (1:8 to 1:16Â M). The band-gap of 3.1-3.3Â eV has potential use in photodegradation applications.
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Tiago Bender Wermuth, Mario Norberto Baibich, Tania Maria Hubert Ribeiro, Carlos Pérez Bergmann,