Combination of NiWO4 and polyaniline with TiO2: fabrication of ternary photocatalysts with highly visible-light-induced photocatalytic performances

摘要

The designing and fabrication of TiO2-based nanocomposites with remarkable photocatalytic efficiency to eliminate different contaminants from the environment are major goals in the research communities. Therefore, in the present work, nickel tungstate (NiWO4) and polyaniline (PA) were used to boost photoactivity of TiO2 upon visible light. The photocatalysts were studied by different instruments. The outcomes represented that the TiO2/NiWO4/PA samples possess notably photocatalytic efficiency in comparison with the TiO2 and TiO2/NiWO4 photocatalysts. The highest photocatalytic ability belonged to the TiO2/NiWO4/PA (30%) photocatalyst, which was nearly 8.2-, 9.3-, 15.5-, 7.2-, and 10.8-fold as high as the bare TiO2 for photoreduction of Cr(VI) and removals of MB, RhB, MO, and fuchsine, respectively. Furthermore, the TiO2/NiWO4/PA (30%) nanocomposite possessed great durability in continuous photocatalytic reactions. According to the outcomes, the ternary TiO2/NiWO4/PA (30%) photocatalyst can be considered as a beneficial nanocomposite for environmental applications.