Photocatalytic hydrogen generation with Ag-loaded LiNbO3

[摘要] In this contribiution LiNbO₃ and Ag-loaded LiNbO₃ photocatalysts were tested in the reaction of hydrogen evolution. The silver modified samples contained different loading of co-catalyst in the range of 0.5â€�??4 wt%. It was essential to optimize the sample composition to achieve an efficient hydrogen evolution. The optimal sample contained 2 wt% of silver. The detailed analysis indicated that silver was deposited on the surface of LiNbO₃ in the form of Ag₂O. Therefore, it is supposed that Ag₂O was responsible for the enhanced photocatalytic activity in the studied reaction. The crystallographic phases and optical and vibronic properties were examined by X-ray diffraction (XRD) and diffuse reflectance (DR) UVâ€�?�Vis and resonance Raman spectroscopic methods, respectively. Morphology of the produced samples were studied using a highresolution transmission electron microscope (HRTEM).

[学科分类] 材料工程

[关键词] Lithium niobate;Ag2O;photocatalysts;hydrogen evolution.