title: Fabrication of Ti substrate grain dependent C/TiO2 composites through carbothermal treatment of anodic TiO2.
abstract: Composite materials of titania and graphitic carbon, and their optimized synthesis are highly interesting for application in sustainable energy conversion and storage. We report on planar C/TiO2 composite films that are prepared on a polycrystalline titanium substrate by carbothermal treatment of compact anodic TiO2 with acetylene. This thin film material allows for the study of functional properties of C/TiO2 as a function of chemical composition and structure. The chemical and structural properties of the composite on top of individual Ti substrate grains are examined by scanning photoelectron microscopy and micro-Raman spectroscopy. Through comparison of these data with electron backscatter diffraction, it is found that the amount of generated carbon and the grade of anodic film crystallinity correlate with the crystallographic orientation of the Ti substrate grains. On top of Ti grains with ∼(0001) orientations the anodic TiO2 exhibits the highest grade of crystallinity, and the composite contains the highest fraction of graphitic carbon compared to Ti grains with other orientations. This indirect effect of the Ti substrate grain orientation yields new insights into the activity of TiO2 towards the decomposition of carbon precursors.
authors.affiliation: Physik-Department, Technische Universität München, James-Franck-Str. 1, 85748 Garching, Germany. Celine.Ruediger@uibk.ac.at and Institut für Physikalische Chemie, Leopold-Franzens-Universität Innsbruck, Innrain 52c, 6020 Innsbruck, Austria. Julia.Kunze@uibk.ac.at.
authors.forename: Celine
authors.initials: C
authors.lastname: Rüdiger
authors.affiliation: Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Favaro
authors.affiliation: Institut für Physikalische Chemie, Leopold-Franzens-Universität Innsbruck, Innrain 52c, 6020 Innsbruck, Austria. Julia.Kunze@uibk.ac.at.
authors.forename: Carlos
authors.initials: C
authors.lastname: Valero-Vidal
authors.affiliation: Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy.
authors.forename: Laura
authors.initials: L
authors.lastname: Calvillo
authors.affiliation: MINES ParisTech, PSL - Research University, CEMEF - Centre de Mise en Forme des Matériaux, CNRS UMR 7635, CS 10207 Rue Claude Daunesse, 06904 Sophia Antipolis Cedex, France.
authors.forename: Nathalie
authors.initials: N
authors.lastname: Bozzolo
authors.affiliation: MINES ParisTech, PSL - Research University, CEMEF - Centre de Mise en Forme des Matériaux, CNRS UMR 7635, CS 10207 Rue Claude Daunesse, 06904 Sophia Antipolis Cedex, France.
authors.forename: Suzanne
authors.initials: S
authors.lastname: Jacomet
authors.affiliation: Institut für Mineralogie und Petrographie, Leopold-Franzens-Universität Innsbruck, Innrain 52d, 6020 Innsbruck, Austria.
authors.forename: Clivia
authors.initials: C
authors.lastname: Hejny
authors.affiliation: Elettra - Sincrotrone Trieste SCpA, SS14-Km163.5 in Area Science Park, 34149 Trieste, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Gregoratti
authors.affiliation: Elettra - Sincrotrone Trieste SCpA, SS14-Km163.5 in Area Science Park, 34149 Trieste, Italy.
authors.forename: Matteo
authors.initials: M
authors.lastname: Amati
authors.affiliation: Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy.
authors.forename: Stefano
authors.initials: S
authors.lastname: Agnoli
authors.affiliation: Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy.
authors.forename: Gaetano
authors.initials: G
authors.lastname: Granozzi
authors.affiliation: Institut für Physikalische Chemie, Leopold-Franzens-Universität Innsbruck, Innrain 52c, 6020 Innsbruck, Austria. Julia.Kunze@uibk.ac.at.
authors.forename: Julia
authors.initials: J
authors.lastname: Kunze-Liebhäuser