Abstract
Z-scheme Ag3PO4 @MoS2 photocatalyst was constructed by decorating MoS2 nanosheets on Ag3PO4 cubes for recovering hydrogen energy from antibiotic wastewater. Abundant oxygen vacancies (Vo) distributed along with Ag3PO4 cube surface are responsible for MoS2 lattice distortion by enabling 2 H phase MoS2 around Vo partially transform in 1 T phase. Free radicals trapping and theoretical calculation approve that Vo act as intermediate medium of charge transferring in Z-scheme Ag3PO4 @MoS2 system. On the strength of Vo and mixed phase of MoS2 providing more exposed active sites, superior conductivity and excellent stability, photocatalytic hydrogen recovery over Ag3PO4 @MoS2 is high up to 54.01 µmol·g−1·h−1 from norfloxacin wastewater (degradation efficiency: 88.36%). It is found that bandgap matching between antibiotics molecule and Ag3PO4 @MoS2 accounts for hydrogen recovery kinetics. H protons could be donated in the process of decyclopropylaton, dihydroxylation and demethylation for antibiotic degradation. This work presents new lines for seeking greater sustainability by managing antibiotics wastewater resource.
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