Abstract
It is of great significance to develop N2 photo-fixation under mild conditions with solar energy as the only energy input. Herein, we report a convenient in-situ decomposition-thermal polymerization method to obtain AgI modified g-C3N4 heterogeneous catalyst with nitrogen vacancy for enhanced photocatalytic nitrogen fixation. The 2.5% AgI loaded g-C3N4 composite exhibited the best performance for N2 photo-fixation (150 mg/L/h/gCat) due to the existence of nitrogen defects, reduced band gap, enhanced separation efficiency of the photo-generated charge carriers and the strong reduction power of more negative conduction band. Furthermore, a feasible reaction mechanism was proposed for the photocatalytic nitrogen fixation process.
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