Surface plasmon resonance triggered promising visible light photocatalysis of LiNbO₃ ceramic supported Ag nanoparticles

Abstract

Water pollution caused by textile industries poses a serious risk to aquatic and human life. 1,2 These industries discharge their waste-water-containing organic dyes into nearby natural sources of water (river, lake, etc.). 3 Many of these organic dyes are of carcinogenic nature. 1 Moreover, these organic dyes disturb aquatic life by causing eutrophication. 3 Nowadays, the photocatalysis process has emerged as an effective solution to remove harmful organic dyes pollutants from the water sources. 4-6 Many semiconductors with wider band gap values such as ZnO, 7 SrTiO 3 , 8 TiO 2 9 etc.

Flexible Ag@LiNbO3/PVDF Composite Film for Piezocatalytic Dye/Pharmaceutical Degradation and Bacterial Disinfection

“…For this purpose, the diffuse reflectance spectra (DRS) of all films were recorded as displayed in Figure . PVDF and LN-PVDF films showed an absorbance edge in the ultraviolet UV region, which was in agreement with the literature for PVDF and LiNbO 3 . On the other hand, the Ag/LN-PVDF composite film showed an additional absorbance hump in the visible region along with the absorbance edge of LiNbO 3 .…”

“…The two visible spectral peaks at 367.9 and 373.90 eV represent two spin−orbit components Ag 3d 5/2 and Ag 3d 3/2 , respectively, which were 6 eV apart from each other. 23,33 These characteristic spin− orbital components evidenced the metallic nature of loaded Ag in the case of the Ag-loaded LiNbO 3 sample. SEM images of the LiNbO 3 and Ag-loaded LiNbO 3 powder samples are shown in Figure 1c,d.…”

“…PVDF and LN-PVDF films showed an absorbance edge in the ultraviolet UV region, which was in agreement with the literature for PVDF 42 and LiNbO 3 . 23 On the other hand, the Ag/LN-PVDF composite film showed an additional absorbance hump in the visible region along with the absorbance edge of LiNbO 3 . The additional hump was previously reported as due to the surface plasmon resonance (SPR) effect of the Ag metal.…”

“…It is reported that LiNbO 3 has promising piezocatalytic dye degradation capability . Further, the loading of Ag noble metal nanoparticles (NPs) on ceramics can boost the electron–hole pair separation, which is desirable in catalysis reactions. , Thus, the incorporation of Ag NP-loaded LiNbO 3 into the PVDF film was expected to show superior piezocatalysis. Thus, in this article, the comparative piezocatalytic performance of PVDF, LiNbO 3 incorporated in PVDF, and Ag NP-loaded LiNbO 3 incorporated in PVDF films is reported.…”

Catalytic Applications of Non‐Centrosymmetric Oxide Nanomaterials

“…As an example, Ag loaded on LiNbO 3 was explored for the photocatalytic degradation of RhB. [43] The catalyst with a microcrystalline interconnected bud-like morphology < 0.2 μm in size exhibited a photoactivity � 19 times higher than that of the undoped lattice. After 240 min, 97 % degradation efficiency was achieved and this was attributed to the SPR effect arising from anchored Ag nanoparticles (Figure 7c).…”