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Title: Co-Ti-O complex oxides: Hydrothermal synthesis, phase characterization, color analysis and catalytic Activity assessment
Authors: Apinpus Rujiwatra
Natthawat Semakul
Sireenart Surinwong
Metta Chareonpanich
Keywords: Cobalt titanate
Hydrothermal synthesis
Fischer-Tropsch synthesis
Issue Date: 2015
Publisher: Science Faculty of Chiang Mai University
Citation: Chiang Mai Journal of Science 42, 4 (Oct 2015), 857 - 867
Abstract: The hydrothermal synthesis of Co-Ti-O complex oxide nanoparticles the reaction between TiO2 and Co(NO3)2.6H2O using the stoichiometric ratio to yield Co2TiO4 and NaOH as mineralizer have been investigated. The particles were characterized by powder X-ray diffraction, selected area electron diffraction, scanning electron and transmission electron microscopies, UV-Vis, infrared and Raman spectroscopies, X-ray absorption near-edge spectroscopy, thermogravimetric analysis and gas sorption measurements. Evidences on the pathogenic formation of Co3O4 and CoTiO3 are illustrated, and the unlikely in yielding a single phase of Co2TiO4 is revealed. Detailed phase characterization is discussed. The particles showed a dark bluish green color, two different morphologies of rhombus and needle shape with a mean particle size of 150 nm, a remarkably narrow pore size distribution below 75 Å, and type II gas sorption behavior. An excellent performance as a catalyst toward the Fischer-Tropsch synthesis with 35% of CO conversion and a high selectivity toward the C10, has been revealed.
ISSN: 0125-2526
Appears in Collections:CMUL: Journal Articles

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