Nanoarchitectonics of CoMoO4/NiS catalyst with starry flower morphology for carrier transport path investigation with advanced and photocatalytic hydrogen evolution performance

A novel p-n heterojunction photocatalyst of CoMoO4/NiS-3 was constructed by electrostatic adsorption (In CoMoO4/NiS-3, the content of CoMoO4 accounts for 30%). Through SEM and crystal structure, it can be seen that the composite catalyst has a starry flower morphology and is successfully synthesized. The fluorescence emission spectra show that CoMoO4/NiS-3 can accelerate the separation rate of photogenerated carriers. The electron transfer mechanism can be determined by ultraviolet characterization and electrochemical methods. Hydrogen evolution experiments can be observed that the amount of hydrogen evolution by the composite catalyst CoMoO4/NiS-3 is 225.1 μmol, which is 2.74 and 4.89 times higher than that of the CoMoO4 and NiS catalysts, respectively. Through the control of the starry flower morphology and the contact interface of p-n heterojunction, the internal electric field is effectively constructed to inhibit the recombination rate of photogenerated carriers, which provides a powerful theoretical model for high performance hydrogen evolution reaction.