title: Preparation of iron oxide-impregnated spherical granular activated carbon-carbon composite and its photocatalytic removal of methylene blue in the presence of oxalic acid.
abstract: The spherical granular activated carbon-carbon composites (GAC-Fe) with different iron oxide contents (Fe mass% = 0.6-10) were prepared by a pore volume impregnation method. The X-ray diffraction (XRD), scanning electron microscopy (SEM), and N2-adsorption results confirm the presence of amorphous iron oxide, pyrolytic carbon, and graphitized globular carbon nanoparticles covered with amorphous carbon in the CAG-Fe. The rate of photodegradation of methylene blue (MB) in aqueous solution under UV light in the presence of oxalic acid correlates with porosity of the prepared materials. The total MB removal includes the combination of adsorption and photodegradation without the addition of H2O2. The results of total organic carbon (TOC) analysis reveal that the decolorization of MB in aqueous solution containing oxalic acid corresponds to the decomposition of organic compounds to CO2 and H2O.
authors.affiliation: a Institute of General and Inorganic Chemistry , Uzbekistan Academy of Sciences , Tashkent , Uzbekistan.
authors.forename: Zukhra C
authors.initials: ZC
authors.lastname: Kadirova
authors.forename: Mirabbos
authors.initials: M
authors.lastname: Hojamberdiev
authors.forename: Ken-Ichi
authors.initials: K
authors.lastname: Katsumata
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Isobe
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Matsushita
authors.forename: Akira
authors.initials: A
authors.lastname: Nakajima
authors.forename: Khasan
authors.initials: K
authors.lastname: Sharipov
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Okada
mesh_terms: D000327:Adsorption; D002244:Carbon / Q000737:chemistry; D017554:Carbon Compounds, Inorganic / Q000737:chemistry*; D002606:Charcoal / Q000737:chemistry; D005290:Ferric Compounds / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D008751:Methylene Blue / Q000302:isolation & purification*; D008855:Microscopy, Electron, Scanning; D019815:Oxalic Acid / Q000737:chemistry*; D010782:Photolysis / Q000528:radiation effects; D016062:Porosity; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction
chemical_list: D017554:Carbon Compounds, Inorganic; D005290:Ferric Compounds; C009139:pyrolytic carbon; D002606:Charcoal; C000499:ferric oxide; D002244:Carbon; D019815:Oxalic Acid; D006861:Hydrogen Peroxide; D008751:Methylene Blue