Polymer-supported NiWO4 nanocomposites for visible light degradation of toxic dyes

In this work, NiWO4 and polymer-based NiWO4 nanocomposites were synthesized by a simple hydrothermal method. The structure and functional groups of the composite materials were analysed by XRD and FTIR spectroscopy. HRTEM analysis confirms the composite materials with nanoplate-like morphology. Then the optical property was examined by UV-Visible spectroscopy. The polymeric materials of Polyaniline (PA) and Polypyrrole are composited with NiWO4 and act as electron trap charge carriers and inhibit the fast electron recombination in the photocatalytic degradation of toxic dyes. The polymer-supported NiWO4 excellently displays the competent electron-hole pairs separation and enhancement of light-reaping performance, thus reveals improved photocatalytic activity of toxic dyes. The crystal violet and methylene blue dyes were used for photocatalytic degradation of toxic dyes. The NiWO4/PA exhibits closely 94% degradation efficiency for both crystal violet and methylene blue dyes. This facilitates enhanced photocatalytic performance and prepared composite material used for wastewater treatment.