Abstract
We reported a facile hydrothermal approach to synthesize BaTiO3 nanocubes with controlled sizes for degradation of methylene blue (MB). The nanocubes with reaction time of 48 hours exhibited the highest photocatalytic efficiency, owing to their narrower size distribution and better crystallinity compared to those of 24 hours and, at the meantime, smaller particle size than those of 72 hours. This work also demonstrated the degradation of methylene orange (MO) using BaTiO3 nanocubes synthesized for 48 hours. Compared with the removal of MB, BaTiO3 had lower photocatalytic activity on MO, mainly due to the poorer absorption behavior of MO on the surface of BaTiO3 nanocubes. The degradation efficiency for each photocatalytic reaction was calculated. The possible mechanism of the photocatalytic decomposition on MB has been addressed as well.
Highlights
In recent years, the elimination of toxic chemicals from wastewater has become increasingly important
The photocatalytic activity of as-prepared BaTiO3 for decomposing methylene blue (MB) and methylene orange (MO) in aqueous solution was investigated by the bleaching of dye solvated
A small amount of BaCO3 was identified in all of the samples contributing to the reaction between Ba(OH)2 and airborne CO2, which dissolved as CO32− during the hydrothermal process [9, 13]
Summary
The elimination of toxic chemicals from wastewater has become increasingly important. The effect of the reaction time on the size and morphology of the nanocubes was studied. The photocatalytic activity of as-prepared BaTiO3 for decomposing methylene blue (MB) and methylene orange (MO) in aqueous solution was investigated by the bleaching of dye solvated.
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