Abstract
The purpose of this work is to achieve a stable graphitic carbon nitride (g-C3N4)/cobalt ions/eosin Y nanohybrid with improved photocatalytic performance by interfacial implantation of cobalt ions. The interaction mechanism among components was explored in detail. The nanohybrid with optimal embedding of 5.0 wt.% cobalt ions showed about 18 times higher activity for H2 production than that of the g-C3N4, and also greater than the sum of g-C3N4/EY and g-C3N4/cobalt ions. It was denoted that there existed synergistic interaction between g-C3N4/cobalt ions and EY. Moreover, the obtained nanohybrid was more stable and active. The photocatalytic mechanism was further investigated by means of photoelectronic measurements, fluorescence spectra, and electron paramagnetic resonance spectra. It was found that, recombination of photogenerated charges was efficiently inhibited owing to strong interfacial interaction in the nanohybrid. It will offer a facile and low-cost way for fabricating other efficient heterogeneous photocatalyst by interfacial implantation of metal ions.
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