Fig. 4. (a) Photocatalytic NH3 production rates for BiVO4, VS-MoS2, BiVO4/VS-MoS2, BiVO4/VS-MoS2 (1/1), BiVO4/VS-MoS2 (1/2), and BiVO4/VS-MoS2 (1/4) under 4 h light irradiation. (b) NH3 synthesis for four cyclic tests of BiVO4/VS-MoS2. (c) The 1H NMR spectra of products with 14N2 or 15N2 as the reaction atmosphere. (d) In situ EPR spectra of BiVO4/VS-MoS2 in the dark or under light irradiation in a N2 atmosphere or light off in a N2 atmosphere. (e) In situ DRIFTS spectra of the photoreduction N2 reaction. (f) The proposed reaction pathway of the photoreduction N2 reaction.
