Abstract
The CdS-ZnWO4 nanocomposite was effectively synthesized by using hydrothermal method. The prepared catalyst was characterized via X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectra (EDS) measurements, elemental color mapping (ECM), high resolution transmission electron microscope (HR-TEM), selected area electron diffraction (SAED), diffuse reflectance spectra (DRS), photoluminescence (PL), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) surface area measurements, Barret–Joyner–Halender (BJH) method and cyclic voltammetry (CV). The degradation of Naphthol Green B (NGB) dye in aqueous solution with CdS-ZnWO4 was investigated for the activity of photocatalyst by UV-A light. CdS-ZnWO4 is more proficient than the other photocatalyst at pH 9 for the mineralization of NGB dye. The effects of equipped parameters such as the amount of photocatalyst, dye concentration, initial pH, reusability, stability on photomineralization of NGB dye have been analyzed. NGB dye degradation mechanism was confirmed by GC–MS. The mineralization of NGB dye has been long-established as a result of COD measurements.
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