Silver Sulfide Anchored Anatase TiO 2 Nanoparticles for Ultrafast Degradation of Selective Textile Dyes

Abstract The surface modification of the TiO 2 with selective narrow band gap of metal or metal sulfide is an attractive attention in recent years. Herein, tiny Ag 2 S nanoparticles are well anchored on the TiO 2 surface by a cost‐effective chemical precipitation method for efficient photocatalytic activity. The decoration of Ag 2 S nanoparticles is clearly identified through electron microscopy studies. The UV‐Vis diffuse reflection spectra (DRS) revealed that TiO 2 /Ag 2 S composites absorbed broad spectrum in the visible region. The reduced band‐gap of 2.41 eV by anchored the Ag 2 S on TiO 2 may boosted the photocatalytic activity. Particularly, incorporation of Ag 2 S nanoparticles increased charge separation efficiency, lowering recombination, and improving photocatalytic performance. Because of their unique structural and optical properties, TiO 2 /Ag 2 S composites have increased photocatalytic activity. The photocatalytic performance of the pristine Ag 2 S and Ag 2 S anchored TiO 2 are Crystal violet (CV) and Methyl orange (MO) dye molecules under same experimental condition. As expected, the TiO 2 /Ag 2 S showed highest photocatalytic degradation efficiency than alone TiO 2 .