title: Preparation and characterization of photoactive composite kaolinite/TiO(2).
abstract: Preparation of nanocomposite kaolinite/TiO(2), using hydrolysis of titanyl sulfate in the presence of kaolin was addressed. A variable (kaolin)/(titanyl sulfate) ratio has been used in order to achieve the desired TiO(2) content in prepared nanocomposites. Calcination of the composites at 600 °C led to the transformation of the kaolinite to metakaolinite and to origination of metakaolinite/TiO(2) composites. The prepared samples were investigated using X-ray fluorescence spectroscopy, X-ray powder diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetry and diffuse reflectance spectroscopy in the UV-VIS region. Structural ordering of TiO(2) on the kaolinite particle surface was modeled using empirical force field atomistic simulations in the Material Studio modeling environment. Photodegradation activity of the composites prepared was evaluated by the discoloration of Acid Orange 7 aqueous solution.
authors.affiliation: Nanotechnology Centre, VŠB-Technical University of Ostrava, 17. listopadu 15/2172, 708 33 Ostrava-Poruba, Czech Republic. katerina.mamulova.kutlakova@vsb.cz
authors.forename: K
authors.initials: K
authors.lastname: Mamulová Kutláková
authors.forename: J
authors.initials: J
authors.lastname: Tokarský
authors.forename: P
authors.initials: P
authors.lastname: Kovář
authors.forename: S
authors.initials: S
authors.lastname: Vojtěšková
authors.forename: A
authors.initials: A
authors.lastname: Kovářová
authors.forename: B
authors.initials: B
authors.lastname: Smetana
authors.forename: J
authors.initials: J
authors.lastname: Kukutschová
authors.forename: P
authors.initials: P
authors.lastname: Čapková
authors.forename: V
authors.initials: V
authors.lastname: Matějka
mesh_terms: D001391:Azo Compounds / Q000737:chemistry / Q000528:radiation effects; D001557:Benzenesulfonates / Q000737:chemistry / Q000528:radiation effects; D004396:Coloring Agents / Q000737:chemistry / Q000528:radiation effects; D003198:Computer Simulation; D004785:Environmental Pollutants / Q000737:chemistry / Q000528:radiation effects; D007220:Industrial Waste / Q000517:prevention & control; D007616:Kaolin / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D010782:Photolysis; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D001557:Benzenesulfonates; D004396:Coloring Agents; D004785:Environmental Pollutants; D007220:Industrial Waste; C009495:titanium dioxide; D007616:Kaolin; D014025:Titanium; C014722:2-naphthol orange