Construction of Ag2O-NiTi-LDH Composite and Its Photocatalytic Oxidation of Ethyl Mercaptan
In this paper, Ag2O-NiTi-LDH composites were prepared by loading silver oxide (Ag2O) onto Ni-Ti layered double hydroxide (NiTi-LDH). The samples were characterized by a means of XRD, SEM, TEM, XPS, UV-vis, electrochemical workstation and FT-IR technologies. The adsorption and photocatalytic performance of samples on ethyl mercaptan were evaluated by static adsorption-photocatalytic method. The results show that there is an interaction between Ag2O and NiTi-LDH, which makes the band gap energy of Ag2O-NiTi-LDH composite lower than that of its precursors, and the efficiency of separation and migration of photo-generated electron-hole is higher. In the photocatalytic experiment, a single precursor NiTi-LDH has no obvious photocatalytic effect on ethyl mercaptan. Both Ag2O and Ag2O-NiTi-LDH can photocatalytic oxidize ethyl mercaptan to sulfates, however, the photocatalytic degradation efficiency of the composite Ag2O-NiTi-LDH has a much higher than that of Ag2O.
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