Thio sol-gel process for the synthesis of titanium disulfide
- Carnegie Mellon Univ., Pittsburgh, PA (United States). Dept. of Materials Science and Engineering
Sulfides of transition metals (titanium, molybdenum, vanadium, tungsten, etc.) represent an important class of materials well-known for their catalytic and electrochemical properties. The catalytic properties make them potentially useful in hydrodesulfurization reactions, and their electrochemical response makes them suitable as active cathodes in rechargeable batteries. A thio sol-gel process for the synthesis of titanium disulfide using titanium alkoxide as the metal source is demonstrated. The alkoxide reacts at room temperature with H[sub 2]S to form a precipitate which is a precursor to the sulfide. Through infrared spectroscopy and chemical analysis of the powder and gas chromatographic analysis of the liquid byproducts of the reaction, it is shown that a partially sulfidized alkoxide precursor forms through the displacement of alkoxy groups from the alkoxide by sulfur-bearing thiol groups. This thiolysis reaction is very similar to that which occurs in the case of sol-gel reactions to form oxides. The alkoxy-thiol species then undergo condensation-polymerization by the liberation of H[sub 2]S. When it is heat-treated in H[sub 2]S, this precursor transforms to TiS[sub 2] at [approximately]700 C. Systematic heat treatments have been performed and the formation of TiS[sub 2] has been observed using X-ray diffractometry. The change in the morphology has also been studied using scanning electron microscopy.
- OSTI ID:
- 7108014
- Journal Information:
- Journal of the American Ceramic Society; (United States), Journal Name: Journal of the American Ceramic Society; (United States) Vol. 77:5; ISSN 0002-7820; ISSN JACTAW
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
250903 -- Energy Storage-- Batteries-- Materials
Components
& Auxiliaries
36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
CATALYSTS
CATHODES
CHALCOGENIDES
CHEMICAL PREPARATION
COHERENT SCATTERING
DIFFRACTION
ELECTRIC BATTERIES
ELECTROCHEMICAL CELLS
ELECTRODES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
SCATTERING
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS
TITANIUM COMPOUNDS
TITANIUM SULFIDES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION