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. 7.. The survey XPS spectra of NaNb1-XTaXO3 (a) and the XPS spectra of NaNb1-XTaXO3 in the Nb 3d (b) and Ta 4f (c) regions.