TiO(2)-graphene nanocomposite as high performace photocatalysts

0374671 - ÚACH 2012 RIV US eng J - Journal Article
Štengl, Václav - Popelková, Daniela - Vláčil, P.
TiO(2)-graphene nanocomposite as high performace photocatalysts.
Journal of Physical Chemistry C. Roč. 115, č. 51 (2011), s. 25209-25218. ISSN 1932-7447. E-ISSN 1932-7455
R&D Projects: GA MPO(CZ) FI-IM3/061; GA MPO FI-IM5/239
Institutional research plan: CEZ:AV0Z40320502
Keywords : titanium-dioxide * visible-light * doped TiO2 * degradation * graphene * oxide
Subject RIV: CA - Inorganic Chemistry
Impact factor: 4.805, year: 2011

Nonstoichiometric TiO(2)-graphene nanocomposite was prepared by thermal hydrolysis of suspension with graphene nanosheets and titania-peroxo complex. The characterization of graphene nanosheets was provided by using an atomic force microscope (AFM). The prepared samples were characterized by Brunauer-Emmett-Teller (BET) surface area and Barrett-Joiner-Halenda porosity (BJH), X-ray diffraction (XRD), infrared spectroscopy (IR), Raman spectroscopy (RS), and transmission electron microscopy (TEM). UV/vis diffuse reflectance spectroscopy was employed to estimate band gap energies. From the titania/graphene samples, a 300 mu m thin layer on a piece of glass 10 x 15 cm was created. The photocatalytic activity of the prepared layers was assessed from the kinetics of the photocatalytic degradation of butane in the gas phase. With regard to the degree of mineralization of butane, the sample labeled TiPC0100 and containing 0.1 g of graphene nanosheets then can be considered as the most active sample.
Permanent Link: http://hdl.handle.net/11104/0207532