Highly efficient single-crystalline NaNb1-XTaXO3 (X = 0.125) wires: The synergistic effect of tantalum-doping and morphology on photocatalytic hydrogen evolution
Qianqian Liua,*(), Quan Zhangb, Lu Zhangb, Wei-Lin Daib,*()

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Fig. 2.. SEM images of NaNb0.875Ta0.125O3 (a, b), NaNb0.75Ta0.25O3 (c) and NaNb0.5Ta0.5O3 (d).