Abstract
AbstractLiNbO3 ceramic was fabricated using solid‐state reaction route. Silver nanoparticles (NPs) were loaded on LiNbO3 at room temperature using silver nitrate and polyethylene glycol reagents, without the use of external heat and light energy. The X‐ray diffraction showed only LiNbO3 phase in Ag‐loaded LiNbO3 sample with no peak related to Ag metal due to small fraction of Ag loading. X‐ray energy diffraction spectroscopy elemental color mapping confirmed the uniform loading of Ag metal on LiNbO3 particles. Ag metal was loaded in the form of NPs as visualized under transmission electron microscope. Ag NPs‐loaded LiNbO3 showed enhanced absorption of visible light owing to the phenomenon of surface plasmon resonance (SPR). The loading of Ag NPs had no effect on the band gap energy of LiNbO3 ceramic. X‐ray photoelectron spectroscopy technique confirmed the metallic chemical state of Ag in Ag NPs‐loaded LiNbO3. Ag NPs‐loaded LiNbO3 degraded 97% rhodamine‐B model dye from the solution when irradiated for 240 minutes under visible light. The dye degradation follows pseudo‐first‐order kinetic having k‐value (kinetic rate constant) of as 0.013 min−1. The •OH (hydroxyl) and (superoxide) radicals were the main active species behind the photocatalytic activity of Ag NPs‐loaded LiNbO3. Thus, Ag NPs‐loaded LiNbO3 could be a potential material for degrading organic dyes from water.
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