WO2006006425A1 - 複合ナノシート及びその製造方法、並びに金属酸化物ナノシートの製造方法 - Google Patents
複合ナノシート及びその製造方法、並びに金属酸化物ナノシートの製造方法 Download PDFInfo
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- WO2006006425A1 WO2006006425A1 PCT/JP2005/012183 JP2005012183W WO2006006425A1 WO 2006006425 A1 WO2006006425 A1 WO 2006006425A1 JP 2005012183 W JP2005012183 W JP 2005012183W WO 2006006425 A1 WO2006006425 A1 WO 2006006425A1
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- Prior art keywords
- nanosheet
- surfactant
- metal oxide
- mixed solution
- composite
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- 239000002135 nanosheet Substances 0.000 title claims abstract description 76
- 229910044991 metal oxide Inorganic materials 0.000 title claims abstract description 31
- 150000004706 metal oxides Chemical class 0.000 title claims abstract description 31
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 17
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical compound CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000004094 surface-active agent Substances 0.000 claims abstract description 30
- 239000011259 mixed solution Substances 0.000 claims abstract description 28
- 150000004703 alkoxides Chemical class 0.000 claims abstract description 23
- 239000002120 nanofilm Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 22
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium dioxide Chemical compound O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 5
- 239000002904 solvent Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- PVADDRMAFCOOPC-UHFFFAOYSA-N oxogermanium Chemical group [Ge]=O PVADDRMAFCOOPC-UHFFFAOYSA-N 0.000 claims description 4
- 239000003093 cationic surfactant Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 19
- 238000001464 small-angle X-ray scattering data Methods 0.000 description 10
- 238000003917 TEM image Methods 0.000 description 8
- 239000010408 film Substances 0.000 description 8
- 229910052732 germanium Inorganic materials 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 238000000235 small-angle X-ray scattering Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 4
- 239000008346 aqueous phase Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000012074 organic phase Substances 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- -1 germanium alkoxide Chemical class 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- NQTSTBMCCAVWOS-UHFFFAOYSA-N 1-dimethoxyphosphoryl-3-phenoxypropan-2-one Chemical compound COP(=O)(OC)CC(=O)COC1=CC=CC=C1 NQTSTBMCCAVWOS-UHFFFAOYSA-N 0.000 description 2
- 241000446313 Lamella Species 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 125000001165 hydrophobic group Chemical group 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 238000003980 solgel method Methods 0.000 description 2
- 238000000101 transmission high energy electron diffraction Methods 0.000 description 2
- VAIFYHGFLAPCON-UHFFFAOYSA-N 1,3-Diacetylpropane Chemical compound CC(=O)CCCC(C)=O VAIFYHGFLAPCON-UHFFFAOYSA-N 0.000 description 1
- 229910016523 CuKa Inorganic materials 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013626 chemical specie Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000002003 electron diffraction Methods 0.000 description 1
- 238000002524 electron diffraction data Methods 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 238000000024 high-resolution transmission electron micrograph Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- AMWRITDGCCNYAT-UHFFFAOYSA-L manganese oxide Inorganic materials [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 1
- PPNAOCWZXJOHFK-UHFFFAOYSA-N manganese(2+);oxygen(2-) Chemical class [O-2].[Mn+2] PPNAOCWZXJOHFK-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002159 nanocrystal Substances 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000000634 powder X-ray diffraction Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000012488 sample solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000005469 synchrotron radiation Effects 0.000 description 1
- GXMNGLIMQIPFEB-UHFFFAOYSA-N tetraethoxygermane Chemical compound CCO[Ge](OCC)(OCC)OCC GXMNGLIMQIPFEB-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000013518 transcription Methods 0.000 description 1
- 230000035897 transcription Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
-
- 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
- C01G17/00—Compounds of germanium
- C01G17/02—Germanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/28—Compounds of silicon
- C09C1/30—Silicic acid
- C09C1/3063—Treatment with low-molecular organic compounds
-
- 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
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/03—Particle morphology depicted by an image obtained by SEM
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/01—Particle morphology depicted by an image
- C01P2004/04—Particle morphology depicted by an image obtained by TEM, STEM, STM or AFM
-
- 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
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/11—Methods of delaminating, per se; i.e., separating at bonding face
- Y10T156/1111—Using solvent during delaminating [e.g., water dissolving adhesive at bonding face during delamination, etc.]
- Y10T156/1116—Using specified organic delamination solvent
Definitions
- the present invention relates to a metal oxide nanosheet, a composite nanosheet comprising the same and a lamellar molecular film of a surfactant, and a method for producing them.
- Nano-sized materials such as ceramic nanosheets
- Known methods for producing ceramic nanosheets include the sol-gel method, electrolytic oxidation method, and CVD method.
- Non-Patent Document 1 layered manganese oxides
- Non-Patent Document 1 layered titanates
- Non-Patent Document 2 layered bebskite
- Non-Patent Document 3 layered niobates
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-335522
- Non-Patent Document 1 Sasaki, T., M. Watanabe, H. Hashizume, H. Yamada, and H. Nakazaw a "Macromolecule- like aspects for a colloidal suspension of an exfoliated titanate. P airwise association of nanosheets and dynamic reassembling process initiated from it
- Non-Patent Document 2 Schaak, R. E. and T. E. Mallou 'Prying apart Ruddlesden- Popper ph ses: Exfoliation into sheets and nanotubes for assembly of perovskite thin films Chemistry of Materials, 12, 3427-3434 (2000b)
- Non-Patent Document 3 Saupe, G., CC Waraksa, H.-N. Kim, YJ Han, DM Kaschak, DM Skinner and TE Mallouk Chemistry of Materials, 12, 1556-1562 (2000) Disclosure of the Invention Problems to be solved by the invention
- the CVD method requires expensive CVD equipment and is not productive.
- Patent Document 1 and Non-Patent Documents 1 to 3 require a step of firing at a high temperature and a long time as described above in order to obtain a starting material. Therefore, the cost is high, and the raw material step force cannot be combined with other substances that can exist only at low temperatures, such as enzymes and organic compounds.
- the nanosheets that can be produced are limited to those having a layered structure. Furthermore, an operation for removing a release agent such as ammine is also necessary.
- the composite nanosheet of the present invention comprises:
- It comprises a molecular film made of a surfactant and having a lamellar structure, and a metal oxide nanosheet formed along the surface direction of the molecular film.
- this composite nanosheet is formed along a molecular film having a nano-size, i.e., a metal oxide nanosheet having a thickness of lOnm or less, and a lamellar structure, it can be stored as it is to maintain a uniform thickness of the nanosize.
- the metal oxide nanosheets can be separated and removed when necessary.
- An appropriate method for removing the metal oxide nanosheet from the composite nanosheet is to dry the composite nanosheet and then immerse the metal oxide nanosheet in the solvent in which the surfactant can be dissolved. It is characterized by separating from a molecular membrane.
- the metal oxide nanosheet can be easily separated from the molecular film and taken out even if it is a solvent in which the surfactant can be dissolved, such as alcohol, even if it is not special. And since it is a common solvent such as alcohol, it is easy to dry and refine.
- the composite nanosheet can be produced by a method characterized by bringing a mixed solution containing a surfactant and a metal alkoxide into contact with water.
- the surfactant is not particularly limited as long as it forms a lamellar structure.
- Preferred are cationic surfactants and nonionic surfactants, and particularly preferred are cationic surfactants such as amines.
- the mechanism of this manufacturing method is not clear, but can be estimated as follows. When the surfactant and the metal alkoxide are mixed, as shown in FIG. 1, the metal alkoxide 1 before hydrolysis has hydrophobicity, so that it is surrounded by the hydrophobic group 2a of the surfactant 2.
- the surfactant 2 When this mixed solution is gently brought into contact with water 3, the surfactant 2 forms a lamellar structure due to the properties of the surfactant 2, and the metal that has moved to the liquid (organic phase) -liquid (aqueous phase) interface i.
- Alkoxide (movement direction: arrow A) reacts with water 3, or water 3 (entry direction: arrow B) that has entered between hydrophilic groups 2b reacts with metal alkoxide 1 to hydrolyze the metal alkoxide. .
- the metal oxide nanosheet 4 is formed along the lamellar molecular membrane of the surfactant.
- the type of metal or the type of alkoxy group is not limited as long as the starting material of the metal oxide is a metal alkoxide. Therefore, a wide variety of metal oxide nanosheets can be obtained.
- the time required for hydrolysis of metal alkoxide is a force that depends on the type of metal alkoxide.
- a mild condition of 00 ° C or less is acceptable. Furthermore, the film thickness of the metal oxide nanosheet obtained is uniform because it is regulated by the lamellar molecular film.
- the present invention produces metal oxide nanosheets by utilizing hydrolysis of metal alkoxide and lamellar molecular films! /, So that various kinds of gold can be produced under mild conditions and in a short time.
- a metal oxide nanosheet can be obtained at low cost.
- FIG. 1 is a diagram showing the behavior of raw materials in the composite nanosheet manufacturing method of the present invention.
- FIG. 2 SAXS pattern at the interface between the liquid (organic phase) and the liquid (aqueous phase) after each time the laurylamine (LA) flows through the water surface.
- FIG. 5 is a logarithmic value pattern of the SAXS intensity at each elapsed time.
- FIG. 6 is a TEM image of the product at the liquid-liquid interface after 3 minutes have passed since the above mixed solution was poured onto the water surface.
- FIG. 7 is an SEM image of the product at the liquid-liquid interface after 5 minutes have passed since the above mixed solution was poured onto the water surface.
- FIG. 8 is an electron diffraction pattern of a product at a liquid-liquid interface of the mixed solution.
- FIG. 9 is an HRTEM image of the product at the liquid-liquid interface of the mixed solution.
- FIG. 10 is a diagram in which each pattern in FIG. 5 is collated with a fitting function in which a Gaussian function and a Lorentz function are mixed.
- FIG. 14 is a TEM image of the product at the liquid-liquid interface 30 minutes after flowing the above mixed solution over the water surface.
- the metal oxide nanosheet in the composite nanosheet for example, a germanium oxide nanosheet having a substantially square shape with a side of lOOOnm or less in plan view is obtained.
- the total thickness of the surfactant molecular film and the metal oxide nanosheet may be 5 nm or less, depending on the initial molecular film thickness. Therefore, for example, a nanosheet having an acid-germanium power can also be used as a catalyst in the production or decomposition process of PET resin.
- the contact between the mixed solution of the surfactant and the metal alkoxide and water is preferably performed by flowing the mixed solution over the surface of water. This is because water penetrates the hydrophilic group of the lamella molecular film formed on the water surface, and the metal alkoxide is hydrolyzed along the surface direction of the molecular film.
- the mixing ratio between the metal alkoxide and the surfactant varies depending on the chemical species.
- the surfactant is laurylamine
- the metal alkoxide is Ge (OR) (R is an alkyl group having 1 to 4 carbon atoms).
- Metal alkoxide Force i (OR) (R is an alkyl group having 1 to 4 carbon atoms, preferably ethoxy group)
- LA Abbreviated as “LA”.
- Acetylethylacetone manufactured by Nacalai Tester Co., Ltd.
- OEt germanium ethoxide Ge
- the composite nano-crystal consisting of acid-germanium nanosheet and LA molecular film A sheet was obtained.
- SAXS small-angle X-ray scattering
- TEM transmission electron microscope
- SEM scanning electron microscope
- SAED electron diffraction
- Figure 2 shows the SAXS intensity measurement data (scattering vector on the horizontal axis) obtained by irradiating synchrotron radiation to the LA molecular membrane prepared as a control.
- Onm A sharp peak indicates that the obtained layer has almost the same periodic interval, that is, has an aligned lamellar structure.
- the broad peak indicates a slightly collapsed lamellar structure.
- Fig. 3 shows SAXS data of a sample obtained by drying a sample after 120 seconds at 40 ° C to obtain a powder.
- the sharp peak at d 3.7 nm and the secondary and tertiary peaks indicated by the arrows clearly show that the period interval d is 3.7 nm in the dry lamellar layer.
- the laminar layer of d 4.2 nm, which was observed at the initial stage of the flow force on the water surface, contained a large amount of water, and the lamellar layer over time. It can be seen that the peak of the upper lamellar layer appears remarkably when the liquid (organic phase) and liquid (aqueous phase) interface (position i in Fig. 1) is far away and does not contain much water.
- Fig. 4 shows SAXS data of a lamellar structure obtained by flowing a mixed solution containing germanium alkoxide on the water surface, and shows the state when 25 seconds have elapsed from the left and 125 seconds have elapsed from the right. .
- a sharp peak at d 3.4 nm or 3.5 nm and secondary and tertiary peaks are observed even after 125 seconds.By comparing 125 seconds in Fig. 4 with 120 seconds in Fig. 2, It is clear that the addition of an alkoxide results in the formation of a stable and ordered lamellar structure. In FIG. 4, the peak is sharper than in FIG. 2, indicating that the lamellar layers are spaced apart and aligned.
- FIG. 5 is a logarithmic value of the SAX S intensity with the elapsed time from the start of flowing the mixed solution to the water surface as a parameter. It can be seen that the periodic interval d is almost constant over time, and is 3.7 nm, which is equal to the total thickness of the LA molecular film and the germanium oxide nanosheet.
- Fig. 6 is a TEM image obtained by photographing the reaction product at the interface between liquid (organic phase) and liquid (aqueous phase) (position i in Fig. 1) after 3 minutes of contact with water. .
- Figure 7 shows a SEM image of the reaction product after 5 minutes. Many cubes with a side of about 300-700 nm can be seen. From Fig. 6 and Fig. 7, the cube in Fig. 7 is a GeO nanostructure sandwiched between LA lamellar molecular films.
- Fig. 8 shows an electron beam of a GeO nanosheet obtained by washing the sample 3 minutes after the mixed solution was brought into contact with water to remove the surfactant by drying with alcohol and drying at 80 ° C. Times
- SAED A folding diagram
- FIG. 10 is a diagram in which the fitting function combining the Gaussian function and the Lorenz function is collated with the SAX S data in FIG.
- the Gaussian function fits when the material is amorphous
- the Forensic function fits when the material is highly crystalline
- the value of ⁇ and j8 of the fitting function to be fitted also judged the crystallinity.
- the solid line graph is a transcription of the SAXS data of FIG. 5, and the dots are the calculated fitting function values. As can be seen in Fig.
- Figure 11 shows a layered GeO nanosheet sandwiched between LA molecular films from an angle to the sheet surface.
- a molecular film is shown. From this image power, it is recognized that the thickness of each GeO sheet is several nm.
- Example 1 The mixed solution was allowed to flow on the water surface under the same conditions as in Example 1 except that.
- the SAXS pattern was measured over time.
- Figure 12 shows the measurement results. As seen in Fig. 12, the peak at 3 seconds is lower and wider than the peak at 2.5 seconds in Fig. 5, and the peak at 5 minutes is at 3 minutes in Fig. 5. Since it is similar to the peak, it is recognized that the reaction rate is slower than that of Example 1. However, it is the same as Example 1 in that a laminate of GeO nanosheets with excellent crystallinity can be obtained in a few minutes!
- Example 3 This example is an example of manufacturing a SiO nanosheet. Purity instead of Ge (OEt) in Example 1
- TEOS tetraethoxysilane Si
- the bottom is the pattern when 6 seconds have elapsed
- the top is the pattern when 72 seconds have elapsed
- 5 minutes have elapsed 9 minutes have elapsed
- 13 minutes have elapsed 20 minutes have elapsed
- the force that is recognized as an unfinished lamella molecular film with a broad peak like P part is a sharp peak like Q part in 9 minutes or more, and a lamellar molecular film is formed and its hydrophilicity
- SiO nanosheets are formed between the functional groups.
- SiO nanometers with a diameter of several tens of nm
- a sheet is formed and SiO nano-shears with a diameter of / z m in the medium concentration region as seen in Fig. 15.
- metal oxide nanosheets can be obtained at low cost under mild conditions in a short time, it is suitable for a wide range of fields such as sensor materials, battery materials, various catalysts, and composites with organic materials. Is available.
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- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
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Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/571,786 US20080299369A1 (en) | 2004-07-09 | 2005-07-01 | Composite Nanosheet, Method of Producing the Same, and Method for Producing Metal Oxide Nanosheet |
| JP2006528845A JP4765079B2 (ja) | 2004-07-09 | 2005-07-01 | 複合ナノシート及びその製造方法、並びに金属酸化物ナノシートの製造方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004-202533 | 2004-07-09 | ||
| JP2004202533 | 2004-07-09 |
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| WO2006006425A1 true WO2006006425A1 (ja) | 2006-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2005/012183 WO2006006425A1 (ja) | 2004-07-09 | 2005-07-01 | 複合ナノシート及びその製造方法、並びに金属酸化物ナノシートの製造方法 |
Country Status (3)
| Country | Link |
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| US (1) | US20080299369A1 (ja) |
| JP (1) | JP4765079B2 (ja) |
| WO (1) | WO2006006425A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017007938A (ja) * | 2011-08-29 | 2017-01-12 | 地方独立行政法人東京都立産業技術研究センター | 多孔質シリカ内包粒子の製造方法 |
| JPWO2018016650A1 (ja) * | 2016-07-22 | 2019-06-20 | 国立研究開発法人科学技術振興機構 | 金属有機構造体ナノシートおよびその製造方法 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11492546B2 (en) | 2019-10-24 | 2022-11-08 | Trustees Of Boston University | 2D electrochromic metal-organic-frameworks |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04280802A (ja) * | 1991-03-07 | 1992-10-06 | Res Dev Corp Of Japan | 金属酸化物薄膜の製造方法 |
| JP2001270022A (ja) * | 2000-03-24 | 2001-10-02 | National Institute For Materials Science | チタニア超薄膜およびその製造方法 |
| JP2002225172A (ja) * | 2001-02-01 | 2002-08-14 | Japan Atom Energy Res Inst | 酸化チタン−有機ハイブリッド層状単層膜およびその多層積層膜とそれらの製造方法 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2006137895A2 (en) * | 2004-09-30 | 2006-12-28 | The Trustees Of Boston College | Single crystal metal nanocrystals |
-
2005
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- 2005-07-01 JP JP2006528845A patent/JP4765079B2/ja not_active Expired - Lifetime
- 2005-07-01 US US11/571,786 patent/US20080299369A1/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04280802A (ja) * | 1991-03-07 | 1992-10-06 | Res Dev Corp Of Japan | 金属酸化物薄膜の製造方法 |
| JP2001270022A (ja) * | 2000-03-24 | 2001-10-02 | National Institute For Materials Science | チタニア超薄膜およびその製造方法 |
| JP2002225172A (ja) * | 2001-02-01 | 2002-08-14 | Japan Atom Energy Res Inst | 酸化チタン−有機ハイブリッド層状単層膜およびその多層積層膜とそれらの製造方法 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017007938A (ja) * | 2011-08-29 | 2017-01-12 | 地方独立行政法人東京都立産業技術研究センター | 多孔質シリカ内包粒子の製造方法 |
| JPWO2018016650A1 (ja) * | 2016-07-22 | 2019-06-20 | 国立研究開発法人科学技術振興機構 | 金属有機構造体ナノシートおよびその製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080299369A1 (en) | 2008-12-04 |
| JP4765079B2 (ja) | 2011-09-07 |
| JPWO2006006425A1 (ja) | 2008-04-24 |
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