《Table 2Decay parameters of EY in aqueous TEOA solution upon the introduc-tion of Zn-P@g-C3N4, Ni-P@

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《可控设计Zn-Ni-P修饰g-C_3N_4催化剂光催化产氢性能（英文）》

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To further investigate the separation and transfer mechanism of the electrons and holes between the excited state eosin and the catalysts and determine the fluorescence lifetimes of Zn-P@g-C3N4，Ni-P@g-C3N4，and Zn-Ni-P@g-C3N4，we used the transient fluorescence spectroscopy technique.Fig.8（b）shows that for all the samples，the fluorescence intensities exponentially decreased，which could be well fitted by using the three radiative lifetimes:[41].The different lifespan changes are shown in Table 2.The longest lifetime increased from 26.34 ns for pure g-C3N4 to 63.68 ns for Zn-Ni-P@g-C3N4，whereas the medium lifetime increased from4.34 ns to 4.94 ns，which showed that the combination of Zn-Ni-P and g-C3N4 effectively increased the lifetime of the charge carriers[42].The result could also explain the good separation efficiency of the photogenerated electron-hole pairs and the effective electron transfer that occurred between Zn-Ni-P and g-C3N4，which was beneficial for improving the photocatalytic H2 production activity.The average life could be calculated by the theoretical formula[43]: