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- W2039165391 abstract "Abstract La 3+ -doped cubic potassium tantalate photocatalysts were prepared by a hydrothermal treatment process. It is found that the La 3+ ions were homogeneously incorporated in the KTaO 3 host lattice, leading to a monotonous lattice contraction and particle size reduction. Meanwhile, the BET surface areas were also enlarged from 4.9 to ∼9.8 m 2 g −1 . Consistently, La 3+ -doped KTaO 3 nanocrystals showed a broadened band gap, which can be well-defined as a consequence of the contractive particle size. DFT calculation predicted a deeper band edge and a dispersive dense state of valance state by La 3+ ions doping due to the hybridization of O 2p and La 6p orbitals, increasing the oxidative capacity and mobility of photogenerated charge carriers, thus enhance the photocatalytic activity. The mixed state of Ta 5+ and Ta 4+ was found to appear in the K 1 − x La x TaO 3 nanocrystals, which may suppress the formation of cationic vacancies. The superior photocatalytic performance of K 1 − x La x TaO 3 nanocrystals was achieved by well-controlled contractive particle size and optimized La 3+ doping level." @default.
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- W2039165391 date "2015-02-01" @default.
- W2039165391 modified "2023-10-18" @default.
- W2039165391 title "A novel contractive effect of KTaO3 nanocrystals via La3+ doping and an enhanced photocatalytic performance" @default.
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- W2039165391 doi "https://doi.org/10.1016/j.jallcom.2014.11.005" @default.
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