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An affordable photocatalyst for pharmaceuticals and superior electrocatalyst for methanol oxidation – A dual role by CuWO4 anchored bentonite clay

Thiruppathi, M., Selvakumar, K., Arunpandian, M., Thirumalai, K., Ramalingan, C., Swaminathan, M., Nagarajan, E.R.
Colloids and surfaces 2019 v.563 pp. 148-159
Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, bentonite, clay, colloids, diclofenac, drugs, energy, hot water treatment, lighting, methanol, nanoparticles, oxidation, photocatalysis, photocatalysts, photoluminescence, photolysis, scanning electron microscopy, transmission electron microscopy, ultraviolet-visible spectroscopy
In this present study, we developed a novel bentonite loaded CuWO4 nanoparticles (BEN-CuWO4 NPs) through the simple hydrothermal method. The as-prepared BEN-CuWO4 NPs was systematically characterized by various spectroscopic techniques including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, Field emission scanning electron microscopy (FESEM), High resolution transmission electron microscopy (HR-TEM), DRS-UV visible spectroscopy, Brunauer–Emmett–Teller (BET), X-ray photoelectron spectroscopy (XPS) and Photoluminescence (PL) techniques. For the first time, the BEN-CuWO4 NPs were utilized as a bifunctional catalyst for the photodegradation of Diclofenac sodium (DFS) and electrooxidation of methanol. More distinctively, the BEN-CuWO4 NPs exhibited excellent photocatalytic activity could degrades above 94% DFS solution under visible light illumination with superior stability. Further, BEN-CuWO4 NPs portrayed superior electrocatalytic activity for the oxidation of methanol when compared to the pristine CuWO4. In addition, Impedance studies revealed that the BEN-CuWO4 NPs holds the tremendous dielectrical properties. This present investigation opens a new door way for the synthesis of multifunctional nanostructured materials for practical energy and environmental applications.