Photocatalytic Hydrogen Production of MoS2 under Dye Co-Sensitization
Dye-sensitization is an effective way to improve the photocatalytic hydrogen production performance of molybdenum disulfide(MoS2).Compared to a single sensitizer,co-sensitization can further expand the light absorption range and improve the photocatalytic efficiency.However,there is no report on the photocatalytic hydrogen production of MoS2 under co-sensitization to date.In this paper,MoS2 was prepared by the liquid-phase method,and its photocatalytic hydrogen production performance under co-sensitization of erythrosin B sodium salt(EB)and rhodamine B(RhB)was investigated.The effects of the adding ratio and order of EB and RhB on hydrogen production performance were studied.The results showed the hydrogen production performance was improved to a certain extent when a small amount of RhB coexisted with EB.The performance of adding RhB and EB in sequence was better than that of adding them together,and the best performance was achieved when RhB was added first.Besides,the reasons for the hydrogen production performance enhancement of MoS2 under co-sensitization were preliminarily elucidated based on the results of UV-visible absorption spectra and fluorescence spectra,as well as the structures of two dyes.
MoS2Erythrosin B sodium saltRhodamine BCo-sensitizationPhotocatalytic hydrogen production
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