EP1778590A1 - Oxyde de titane a structure rutile avec reseau orthorhombique et groupe d'espace pnmm - Google Patents
Oxyde de titane a structure rutile avec reseau orthorhombique et groupe d'espace pnmmInfo
- Publication number
- EP1778590A1 EP1778590A1 EP05788498A EP05788498A EP1778590A1 EP 1778590 A1 EP1778590 A1 EP 1778590A1 EP 05788498 A EP05788498 A EP 05788498A EP 05788498 A EP05788498 A EP 05788498A EP 1778590 A1 EP1778590 A1 EP 1778590A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- titanium oxide
- rutile
- ticl
- aqueous solution
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 61
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 title claims abstract description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 14
- 239000000243 solution Substances 0.000 claims description 14
- 239000007864 aqueous solution Substances 0.000 claims description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000005119 centrifugation Methods 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 4
- 239000012153 distilled water Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 239000002244 precipitate Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 230000002378 acidificating effect Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000003504 photosensitizing agent Substances 0.000 claims description 3
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 239000012429 reaction media Substances 0.000 claims description 2
- 238000002336 sorption--desorption measurement Methods 0.000 claims description 2
- 239000005348 self-cleaning glass Substances 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 10
- 230000007062 hydrolysis Effects 0.000 description 9
- 238000006460 hydrolysis reaction Methods 0.000 description 9
- 229910010413 TiO 2 Inorganic materials 0.000 description 8
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 8
- 238000002360 preparation method Methods 0.000 description 8
- 239000010936 titanium Substances 0.000 description 5
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- 239000012736 aqueous medium Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- 229910052707 ruthenium Inorganic materials 0.000 description 3
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 239000011630 iodine Substances 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 241000283984 Rodentia Species 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 238000003917 TEM image Methods 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000004904 UV filter Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000011260 aqueous acid Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 125000003253 isopropoxy group Chemical group [H]C([H])([H])C([H])(O*)C([H])([H])[H] 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- MINVSWONZWKMDC-UHFFFAOYSA-L mercuriooxysulfonyloxymercury Chemical compound [Hg+].[Hg+].[O-]S([O-])(=O)=O MINVSWONZWKMDC-UHFFFAOYSA-L 0.000 description 1
- 229910000371 mercury(I) sulfate Inorganic materials 0.000 description 1
- 230000001089 mineralizing effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011858 nanopowder Substances 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001149 thermolysis Methods 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
- C01G23/0536—Producing by wet processes, e.g. hydrolysing titanium salts by hydrolysing chloride-containing salts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
- C03C17/23—Oxides
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
- C03C17/23—Oxides
- C03C17/25—Oxides by deposition from the liquid phase
- C03C17/256—Coating containing TiO2
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/20—Light-sensitive devices
- H01G9/2027—Light-sensitive devices comprising an oxide semiconductor electrode
- H01G9/2031—Light-sensitive devices comprising an oxide semiconductor electrode comprising titanium oxide, e.g. TiO2
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/72—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/76—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by a space-group or by other symmetry indications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/70—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
- C01P2002/77—Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by unit-cell parameters, atom positions or structure diagrams
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/20—Materials for coating a single layer on glass
- C03C2217/21—Oxides
- C03C2217/212—TiO2
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
- C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
- C03C2217/44—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the composition of the continuous phase
- C03C2217/45—Inorganic continuous phases
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/40—Coatings comprising at least one inhomogeneous layer
- C03C2217/43—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase
- C03C2217/46—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase
- C03C2217/48—Coatings comprising at least one inhomogeneous layer consisting of a dispersed phase in a continuous phase characterized by the dispersed phase having a specific function
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/71—Photocatalytic coatings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/542—Dye sensitized solar cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S977/00—Nanotechnology
- Y10S977/70—Nanostructure
- Y10S977/811—Of specified metal oxide composition, e.g. conducting or semiconducting compositions such as ITO, ZnOx
Definitions
- the present invention relates to a new form of titanium oxide, and a process for its preparation.
- Titanium oxide is a compound widely used in various fields of the industry. The uses are varied, and they depend in particular on its crystallographic structure and its morphology.
- hydrothermal preparation has been widely explored, but its main disadvantage is the relatively high temperatures and pressures required. Indeed, rutile is the thermodynamically stable phase and its formation requires hard conditions, i.e., acidic media, high temperatures and / or long aging times.
- hydrothermal syntheses consist in heating between 140 ° C. and 1200 ° C. a precursor such as TiCl 4 (H. Yin, Y. Wada, T.
- the particles obtained are generally elongated, and their size is of the order of
- Titanium oxides have also been prepared by hydrolysis of a Ti (IV) compound in aqueous medium at temperatures below 100 ° C., but the compounds obtained are anisotropic (S. Yin, H. Hasegawa, T. Sato, Chem Lett, 2002, 564).
- TiO 2 can also be obtained by electrochemical syntheses, but the synthesis conditions are restrictive and the morphology of the compound obtained is difficult to control.
- the hydrolysis of various precursors has also been used for the preparation of TiO 2 .
- TiO 2 is obtained in the form of brookite, from an aqueous solution of TiCl 3 at a pH of less than 5 (B. Othani, et al., Chem Phys Lett, 1985, 120 (3), 292).
- TiO 2 is obtained in the form of a mixture of rutile, brookite, TiO 2 and Ti 7 O 3 by hydrolysis of an aqueous solution of TiCl 3 which contains urea, the pH of the solution thus being brought back to basic pH values as urea decomposes (A. Ookubo, et al J. Mater Sci., 1989, 24, 3599).
- the preparation of TiO 2 in rutile form by direct oxidation of TiCl 3 at room temperature is described by F. Pedraza, et al. ⁇ Phys. Chem. Solids, 1999, 60 (4), 445).
- the method con ⁇ sists either leave TiCl 3 in water for a certain period (60 hours for example) to obtain the hydrolysis of TiCl 3 in the TiO 2, is heating the aqueous TiCl 3 solution 8O 0 C, then filtering the particles formed and drying them at 120 ° C. or more.
- a rutile nanopowder is obtained by direct hydrolysis of TiCl 3 solutions under mild conditions, in the presence of (CH 3 ) 4 NOH acting as a precipitant.
- the rutile particles are in the form of needles.
- the three polymorphs of TiO 2 can be synthesized by thermolysis of TiCl 4 or TiCl 3 in an aqueous medium and the control of the conditions of precipitation (acidity, nature of the anions, ionic strength, titanium concentration, etc.) makes it possible to control the crystalline structure, the size and the morphology of the particles. Spheroidal nanoanatase, pure brookite platelets having a nanometric dimension and rutile of different shapes can thus be obtained.
- the inventors have now found that, under very specific conditions of implementation, a process for the hydrolysis of TiCl 3 makes it possible to obtain a new form of titanium oxide. This is why the present invention relates to a titanium oxide and a process for its preparation.
- It has a platelet morphology which is rectangular in shape with a length between 3 and 10 nm, a width between 3 and 10 nm, and a thickness of less than 1 nm; it has a specific surface area, determined by adsorption-desorption; nitrogen, from 100 to 300 m 2 / g.
- the titanium oxide according to the invention can be obtained by a process consisting of preparing an aqueous solution of TiCl 3 having a concentration of TiCl 3 , for example 0.15 mol / L, whose pH is 3.5, at bring the reaction medium to a temperature of 60 ° C. ⁇ 3 ° C., leave it to mature for 24 hours and then remove the precipitate obtained by centrifugation.
- the initial aqueous solution of TiCl 3 can be brought to the desired pH by addition of a suitable amount of a base, for example an alkali metal hydroxide (in particular NaOH and KOH), NH 4 OH or NH 3 .
- a base for example an alkali metal hydroxide (in particular NaOH and KOH), NH 4 OH or NH 3 .
- the precipitate obtained after centrifugation is rinsed with an acidic aqueous solution, recentrifuged, rinsed again with distilled water, and then dried. 1 rinsing is preferably carried out using an aqueous acid solution, for example HCl, HNO 3, HClO 4 having an acid concentration up to 3 mol / L.
- the final drying can be carried out in an oven, or under a stream of nitrogen.
- the platelet morphology of the rutile of the invention has an undeniable advantage in forming coatings for various substrates. Because of their platelet mor ⁇ phology, the nanometric rutile particles of the invention form coatings of better quality than those obtained from spheres or rod-shaped particles. For example, wafer-shaped rutile coatings are more transparent and more covering.
- the platelet morphology rutile of the present invention can be used in the development of self-cleaning glazing. Such glazing is obtained by depositing, by known techniques, a wafer-shaped rutile film on a glass plate. It can also be used as a coating or as a component for the preparation of a UV filter, especially for sun creams, anti-UV clothing, or anti-yellowing agent.
- the morphology of nanoscale wafer rutile gives interesting photoelectrochemical properties.
- the rutile according to the invention can therefore be used for the production of photosensitive film for the production of photovoltaic cells, as described in particular in WO91.16719.
- Such a cell comprises two electrodes of which at least one is transparent, and means for the passage of electric current, said electrodes being separated by at least one glass plate or a transparent polymer on which at least one layer of titanium oxide according to the invention was applied after impregnation with a photosensitizer.
- a photosensitive film can be obtained by preparing a titanium oxide film from a concentrated aqueous solution, then impregnating said film with a photo-sensitizing agent, chosen for example from Ru, Os or a transition metal such as for example Fe.
- a photo-sensitizing agent chosen for example from Ru, Os or a transition metal such as for example Fe.
- Example 1 To 4 mL of a commercial solution of TiCl 3 (15%) in HCl was added 50 mL of distilled water. The pH of the solution was adjusted to 3.5 with sodium hydroxide. The TiCl 3 concentration of the solution thus obtained is 0.15 mol / L. This solution was then heated to 60 ° C and held at that temperature for 24 hours. Then, the particles formed were separated by centrifugation, washed with distilled water and then put back into aqueous solution with the addition of 100 ml of an aqueous solution of HNO 3 at pH 2. The sol thus obtained is stable. Part of the particles obtained after centrifugation was dried under a stream of nitrogen. The recovered dry powder was subjected to X-ray diffraction analysis.
- Figure 1 shows the X-ray diffraction pattern for the compound obtained.
- the length and the width of the plates correspond respectively to the faces [110] and [001].
- Figure 3 shows a TEM micrograph of the product obtained.
- the deposited film was dried in an oven at 60 ° C. for a few minutes, then annealed at 450 ° C. for 30 minutes. It was verified that the annealing retained the crystal structure and the size of the initial platelets.
- the annealed film obtained is porous and its surface is homogeneous. Its thickness is 1-2 ⁇ m.
- the film was immersed in a solution of a bi-pyridyl derivative of ruthenium (marketed by Solaronix under the name ruthenium 535) in ethanol, and kept in this solution in the dark for 24 hours. The film took a dark red coloring.
- the open circuit potential V O was measured as follows. In a tank containing acetonitrile, potassium iodide (0.1 mol / L) and iodine, the sensitized film, a mercurous sulfate reference electrode, and a platinum counter electrode were immersed. The film was illuminated by a lamp in the visible range, and was measured V O c between the working electrode and the platinum electrode to different concentrations of iodine. The potential of the platinum electrode E Pt is proportional to the concentration of iodine in the solution, depending on the relationship
- Figure 4 represents the V O c (in mV) as a function of E Pt (in mV).
- Figures 5 and 6 are given for comparison. They represent the evolution of the V O c obtained from a rutile film with rod morphology (FIG 5) and an anatase film with spherical morphology (FIG 6) sensitized under the same conditions as the film.
- rutile platelet morphology according to the invention. It appears that the V O c of platelet-shaped rutile is improved with respect to the V O c of rod-shaped rutile, and is approximately equivalent to the V o c of anatase which is generally used for films. photosensitive materials based on titanium oxide. However, because of their respective morphologies, a wafer-shaped rutile film has the advantage of having a hiding power greater than that of a spherical morphology anatase film.
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- Chemical & Material Sciences (AREA)
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- Materials Engineering (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Nanotechnology (AREA)
- Inorganic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Composite Materials (AREA)
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- Microelectronics & Electronic Packaging (AREA)
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- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Catalysts (AREA)
- Hybrid Cells (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0407969A FR2873112B1 (fr) | 2004-07-19 | 2004-07-19 | Oxyde de titane a structure rutile |
| PCT/FR2005/001795 WO2006018492A1 (fr) | 2004-07-19 | 2005-07-12 | Oxyde de titane a structure rutile. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1778590A1 true EP1778590A1 (fr) | 2007-05-02 |
Family
ID=34947015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05788498A Withdrawn EP1778590A1 (fr) | 2004-07-19 | 2005-07-12 | Oxyde de titane a structure rutile avec reseau orthorhombique et groupe d'espace pnmm |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7731934B2 (fr) |
| EP (1) | EP1778590A1 (fr) |
| JP (1) | JP5015773B2 (fr) |
| CA (1) | CA2574027C (fr) |
| FR (1) | FR2873112B1 (fr) |
| WO (1) | WO2006018492A1 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4635257B2 (ja) * | 2006-02-28 | 2011-02-23 | 独立行政法人物質・材料研究機構 | 二酸化チタンを製造する方法 |
| TWI487668B (zh) * | 2009-02-19 | 2015-06-11 | Sakai Chemical Industry Co | 金紅石型氧化鈦粒子之分散體,其製造方法,及其用途 |
| US8226911B2 (en) * | 2009-09-10 | 2012-07-24 | The National Titanium Dioxide Co., Ltd. (Cristal) | Methods of producing titanium dioxide nanoparticles |
| US20140256540A1 (en) * | 2013-03-08 | 2014-09-11 | Nitto Denko Corporation | High surface area photocatalyst material and method of manufacture |
| JP7505321B2 (ja) * | 2020-08-18 | 2024-06-25 | 堺化学工業株式会社 | ルチル型板状酸化チタン及びその製造方法 |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3018186A (en) * | 1957-03-20 | 1962-01-23 | Monsanto Chemicals | Laminar titanium dioxide |
| JPS56155098A (en) * | 1980-04-24 | 1981-12-01 | Matsushita Electric Ind Co Ltd | Production of titanium dioxide |
| ES2080313T3 (es) * | 1990-04-17 | 1996-02-01 | Ecole Polytech | Celulas fotovoltaicas. |
| JPH1095617A (ja) * | 1996-04-26 | 1998-04-14 | Ishihara Sangyo Kaisha Ltd | 板状酸化チタンおよびその製造方法ならびにそれを含有してなる日焼け止め化粧料、樹脂組成物、塗料組成物、吸着剤、イオン交換剤、複合酸化物前駆体 |
| JP3959213B2 (ja) * | 1999-06-30 | 2007-08-15 | 住友化学株式会社 | 酸化チタン、それを用いてなる光触媒体及び光触媒体コーティング剤 |
| JP4304847B2 (ja) * | 2000-08-17 | 2009-07-29 | 住友化学株式会社 | ルチル型酸化チタン粉末の製造方法 |
| US7175911B2 (en) * | 2002-09-18 | 2007-02-13 | Toshiba Ceramics Co., Ltd. | Titanium dioxide fine particles and method for producing the same, and method for producing visible light activatable photocatalyst |
| US7232556B2 (en) * | 2003-09-26 | 2007-06-19 | Nanoproducts Corporation | Titanium comprising nanoparticles and related nanotechnology |
| US7438948B2 (en) * | 2005-03-21 | 2008-10-21 | Ppg Industries Ohio, Inc. | Method for coating a substrate with an undercoating and a functional coating |
-
2004
- 2004-07-19 FR FR0407969A patent/FR2873112B1/fr not_active Expired - Fee Related
-
2005
- 2005-07-12 US US11/632,778 patent/US7731934B2/en not_active Expired - Fee Related
- 2005-07-12 CA CA2574027A patent/CA2574027C/fr not_active Expired - Fee Related
- 2005-07-12 JP JP2007521975A patent/JP5015773B2/ja not_active Expired - Fee Related
- 2005-07-12 EP EP05788498A patent/EP1778590A1/fr not_active Withdrawn
- 2005-07-12 WO PCT/FR2005/001795 patent/WO2006018492A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006018492A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2873112A1 (fr) | 2006-01-20 |
| JP5015773B2 (ja) | 2012-08-29 |
| CA2574027A1 (fr) | 2006-02-23 |
| US20070277872A1 (en) | 2007-12-06 |
| WO2006018492A1 (fr) | 2006-02-23 |
| US7731934B2 (en) | 2010-06-08 |
| CA2574027C (fr) | 2013-01-22 |
| JP2008506627A (ja) | 2008-03-06 |
| FR2873112B1 (fr) | 2006-10-27 |
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