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The enhanced photocatalytic performance of nanocomposite is synthesized via the hydrothermal method and characterized using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FT-IR), UV–visible diffuse reflectance spectroscopy (UV–Vis DRS) and photoluminescence spectroscopy (PL). Under visible light irradiation, PVA assisted Bi2WO6–CdS nanocomposite film displayed enhanced photocatalytic efficiency and inhibition of photocorrosion as compared with pure CdS, pure Bi2WO6 and Bi2WO6–CdS composite. The PVA assisted Bi2WO6–CdS composite film catalyst showed stable catalytic performance until seven successive runs with 92% of methylene blue(MB) degradation, and easy to recover after degradation of organic pollutant. PVA assisted Bi2WO6–CdS nanocomposite film has optimal band edge position for superior photocatalytic degradation. Furthermore, the trapping experiment was carried out using different scavenger for active species. Among the active species, OH· are the most responsive species which play a vital role in the degradation of metronidazole and MB.

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In the present work, the Ni/Ce‐codoped CdS Nanoparticles (NPs) were synthesized through a hydrothermal method. The phase structure, chemical state, chemical composition, morphology and optical properties of prepared samples were characterized using X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), Energy Dispersive X‐Ray Analysis (EDX), Fourier transform infrared spectroscopy (FT‐IR), High‐resolution transmission electron microscopy (HRTEM), UV‐Vis diffuse reflectance spectroscopy (DRS), Photoluminescence (PL) spectroscopy studies and their photocatalytic activities of Rhodamine B (RhB) degradation were studied under visible light irradiation. The Ni and Ce doped CdS NPs showed higher photocatalytic activity compared to that of pure CdS, and the activity was further enhanced by codoping of Ni and Ce into CdS. The enhancement of photocatalytic activity is due to the synergistic effect of Ni and Ce ions and with a narrowed bandgap, which may facilitate inhabitation of the photogenerated charge carrier recombination. Meanwhile, the possible photocatalytic mechanism of Ni and Ce codoped CdS was proposed on the basis of trapping experiments. Additionally, the antibacterial activity of Ni/Ce codoped CdS NPs was evaluated against E. coli and S. aureus.