TY - JOUR ID - 248288 TI - Synthesis, characterization and photocatalytic application of ZnWO4/ZrO2 nanocomposite towards degradation of methyl orange dye JO - Journal of Water and Environmental Nanotechnology JA - JWENT LA - en SN - 2476-7204 AU - K, Buvaneswari AU - R, Arunadevi AU - S, Sashikala AU - K, Kavipriya AD - P.G. Department of Chemistry, Sri S.Ramasamy Naidu Memorial College, Sattur- 626203. Tamilnadu, India. AD - D.K.M.College for Women, Vellore AD - P.G and Research Department of Chemistry, D.K.M.College for Women (Autonomous), Vellore-632001, Tamilnadu, India. AD - Thiravium College of Arts and Science for Women, Kailasapatti, Periyakulam, Theni DT Y1 - 2021 PY - 2021 VL - 6 IS - 4 SP - 367 EP - 378 KW - ZnWO4/ZrO2 KW - Photocatalysis KW - Visible light KW - Methyl orange DO - 10.22090/jwent.2021.04.007 N2 - Visible light active ZnWO4/ZrO2 nanocomposite was prepared via hydrothermal method. The nanocomposite was characterized by UV-visible diffuse reflectance spectroscopy (UV-vis-DRS), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Scanning Electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and transmission electron microscopy (TEM) techniques. The XRD results showed that average particle size of ZrO2, ZnWO4 and ZnWO4/ZrO2 were found to be 29.20 nm, 23.78 nm and 20.14 nm respectively and the phase structure for ZrO2 and ZnWO4 in the composite was Rhombohedral and Monoclinic respectively. The UV–vis absorption spectra of the ZnWO4/ZrO2 nanocomposite noticeably shifted to the visible light region compared to that of the ZrO2. The prepared photocatalyst were composed of plate and spongy sphere with little agglomeration was seen from SEM result. The photocatalytic activities of the prepared nanocomposite was evaluated for the degradation of methyl orange (MO) under visible light irradiations. The effect of operational parameters such as initial dye concentration, pH, catalyst concentration and irradiation time have been investigated in detail. The photocatalytic degradation efficiency of ZnWO4/ZrO2, ZnWO4 and ZrO2 for 95%, 72% and 60 % respevtively. The high photocatalytic activity can be attributed to stronger absorption in the visible light region, a greater specific surface area, smaller crystal sizes, more surface OH groups, and to the effect of ZnWO4 doping, which resulted in a lower band gap energy. UR - https://www.jwent.net/article_248288.html L1 - https://www.jwent.net/article_248288_c455331117158eb011140a3291cb091e.pdf ER -