非现建制知识库

In this paper, a new photocatalyst, ZnFe₂O₄ spinel powder without any noble metal loading was studied in dispersion system irradiated with visible light and under different conditions. The typical result is that hydrogen generation rate is 0.026 mL/h.mg cat. in 25 mL of 0.1 M sulfide solution containing 25 mg ZnFe₂O₄ powder at pH12. The DRS and XRD spectra show that the ZnFe₂O₄ Powder absorbs visible light and has a spinel structure. The dependences of H₂ production rate on pH and concentration of sulfide were also studied. ZnFe₂O₄ spinel powder has a good performance for H₂S photodecomposition at pH 8-12. Photocatalytic activity of ZnFe₂O₄ is much higher than that of ZnS-CdS in the same condition.