Defect-induced atomic-level intimate interface of a hollow Ov-CeO2/CdS photocatalyst with a Z-scheme to boost hydrogen evolution

In situ formation of CeO2 coupled with hollow NiCo-LDH nanosheets for efficient photocatalytic hydrogen evolution

“…58 The corresponding flat band potentials E FB of CeO 2 and NiCo-LDH are −0.78 and −1.45 V ( vs. SCE), respectively. According to E NHE = E SCE + 0.24, E FB is generally positive 0.1 eV compared to E CB ; 54 the converted E CB of CeO 2 and NiCo-LDH are −0.64 and −1.31 eV (with respect to the NHE), which are almost the same as the above results. Based on the staggered energy band positions of CeO 2 and NiCo-LDH, it can be speculated that the electron transfer mechanism of the heterojunction constructed by them may be Z-scheme or type-II.…”

“…The decrease in fluorescence intensity demonstrates that the recombination of photoexcited electrons and holes is prevented, indicating that the separation efficiency is improved. 54 Furthermore, time-resolved fluorescence spectra were also recorded. The fluorescence lifetime measurements of samples have been carried out through the TCSPC technique where the data were fitted by a two-exponential equation.…”