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The effects of KOH concentration (10–30M) on the morphology of KNbO 3 produced from Nb 2 O 5 by hydrothermal synthesis have been investigated. High purity KNbO 3 nanocubes have been obtained using 30M KOH at 200°C. The KNbO 3 nanocubes can be readily doped with nitrogen by heating with urea at 425°C without significant change in morphology. The band gap of KNbO...
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