title: Sol-Gel Synthesis and Characterizations of CoMoO4 Nanoparticles: An Efficient Photocatalytic Degradation of 4-Chlorophenol.
abstract: Cobalt molybdate CoMoO4 nanoparticles (NPs) were successfully synthesized using cobalt nitrate, ammonium molybdate, citric acid and ethyl cellulose by a simple sol-gel method. Structural, morphological, optical and magnetic properties of the obtained powder were characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra, high resolution scanning electron microscope (HR-SEM), energy dispersive X-ray (EDX), UV-Visible diffuse reflectance spectra (DRS), photoluminescence (PL) spectra and vibrating sample magnetometer (VSM). XRD results indicated that the resultant powder was pure single phase crystalline with monoclinic structure. FT-IR spectra indicate the type of bonds between metals and oxygen. HR-SEM images shows that the morphology of the powder consist with well defined nanoparticles (NPs) structure. VSM results showed antiferromagnetic behavior. Photo-catalytic activity of CoMoO4 nanoparticles (NPs) was performed. The addition of TiO2 catalyst enhanced the photo-catalytic activity of CoMoO4 nanoparticles (NPs). The catalysts CoMoO4, Ti02 and mixed oxide catalyst CoMoO4-TiO2 nano- composites (NCs) were tested for the photo-catalytic degradation (PCD) of 4-chlorophenol (4-CP). It was found that the PCD efficiency of CoMoO4-TiO2 NCs was higher (97.5%) than that of pure CoMoO4 (88.0%) and TiO2 (94.0%) catalysts.
authors.forename: V
authors.initials: V
authors.lastname: Umapathy
authors.forename: P
authors.initials: P
authors.lastname: Neeraja
mesh_terms: D002384:Catalysis; D002733:Chlorophenols / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D053768:Metal Nanoparticles; D008855:Microscopy, Electron, Scanning; D008982:Molybdenum / Q000737:chemistry*; D055668:Photochemical Processes; D033362:Powder Diffraction; D012666:Semiconductors; D013052:Spectrometry, X-Ray Emission; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D002733:Chlorophenols; C029107:4-chlorophenol; D003035:Cobalt; D008982:Molybdenum