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Patent
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Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method for preparing a W 0 3/WS₂ porous hollow shell nanomaterial, comprising the steps of: 1) adding a hexavalent tungsten salt to a sol A comprising mesocarbon microbeads, and stirring to obtain a sol B, wherein a concentration of the mesocarbon microbeads in the sol A is 0.00 2 0.2 g/mL, and a concentration of the W "* in the sol B is 0.01 ~ 2.0 mol/L; 2) drying and grinding the sol B obtained by Step 1, and then heating a resulting powder at 200-500 0 C for 0.5-2 hours to obtain a porous hollow shell W 0 3 nanocrystalline material; and 3) placing the porous hollow shell W 0 3 nanocrystalline material obtained by Step 2 and a sulfur powder separately into a vacuum tube furnace, controlling such that a degree of vacuum is -0.01 to -0.1 MPa and a temperature is 200-500 0 C, and reacting for 0.5-3 hours to sulfurize some W 0 3 of the porous hollow shell W 0 3 nanocrystalline material into WS₂ to obtain a W₀ 3/WS₂ porous hollow shell nanocrystalline material.
The method according to claim 1, characterized in that a solvent of the sol A is anhydrous ethanol, isopropyl alcohol, ethylene glycol, and/or distilled water, the sol A further comprises a dispersant, the dispersant being polyvinyl alcohol, carboxymethylcellulose sodium, lauryl sodium sulfate, and/or polyethylene glycol, and a concentration of the dispersant in the sol A is 0.006 ~ 0.25 g/mL.
The method according to any one of claims 1-3, characterized in that the sol B is obtained by adding the hexavalent tungsten salt to the sol A and stirring, then placing a resulting mixture in a 300 ~ 1000 W ultrasonic generator for ultrasonic vibration and aging for 60 ~ 180 minutes.
The method according to any one of claims 1-4, characterized in that, in Step 2, the sol B is dried in a vacuum drying oven at 40-70 0 C for 2-6 hours, followed by being ground.
The method according to any one of claims 1-5, characterized in that a mass ratio of the porous hollow shell W 0 3 nanocrystalline material to the sulfur powder is (0.1 ~ 10 g): (0.1 4.0 g).
The method according to any one of claims 1-6, characterized in that the hexavalent tungsten salt is at least one of tungsten hexachloride, sodium tungstate, ammonium tungstate, and sodium polytungstate.
A W 0 3/WS₂ porous hollow shell nanomaterial obtained by the method according to any one of claims 1-7, in which a porous hollow shell presents a honeycomb structure with a pore size of 0.2 ~ 2.0 m and a shell wall thickness of 40-150 nm, and nanoparticles attached thereon have a particle size of 30-100 nm.
Materials described outside the worked examples.
WO₃/WS₂ porous hollow shell nanomaterial
porous hollow shell WO₃ nanocrystalline material
WO₃
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Pore Size | 0.2–2 µm | WO₃/WS₂ porous hollow shell nanomaterial |
Shell Wall Thickness | 40–150 nm |
Patent
Atlas literature
Patent
Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method for preparing a W 0 3/WS₂ porous hollow shell nanomaterial, comprising the steps of: 1) adding a hexavalent tungsten salt to a sol A comprising mesocarbon microbeads, and stirring to obtain a sol B, wherein a concentration of the mesocarbon microbeads in the sol A is 0.00 2 0.2 g/mL, and a concentration of the W "* in the sol B is 0.01 ~ 2.0 mol/L; 2) drying and grinding the sol B obtained by Step 1, and then heating a resulting powder at 200-500 0 C for 0.5-2 hours to obtain a porous hollow shell W 0 3 nanocrystalline material; and 3) placing the porous hollow shell W 0 3 nanocrystalline material obtained by Step 2 and a sulfur powder separately into a vacuum tube furnace, controlling such that a degree of vacuum is -0.01 to -0.1 MPa and a temperature is 200-500 0 C, and reacting for 0.5-3 hours to sulfurize some W 0 3 of the porous hollow shell W 0 3 nanocrystalline material into WS₂ to obtain a W₀ 3/WS₂ porous hollow shell nanocrystalline material.
The method according to claim 1, characterized in that a solvent of the sol A is anhydrous ethanol, isopropyl alcohol, ethylene glycol, and/or distilled water, the sol A further comprises a dispersant, the dispersant being polyvinyl alcohol, carboxymethylcellulose sodium, lauryl sodium sulfate, and/or polyethylene glycol, and a concentration of the dispersant in the sol A is 0.006 ~ 0.25 g/mL.
The method according to any one of claims 1-3, characterized in that the sol B is obtained by adding the hexavalent tungsten salt to the sol A and stirring, then placing a resulting mixture in a 300 ~ 1000 W ultrasonic generator for ultrasonic vibration and aging for 60 ~ 180 minutes.
The method according to any one of claims 1-4, characterized in that, in Step 2, the sol B is dried in a vacuum drying oven at 40-70 0 C for 2-6 hours, followed by being ground.
The method according to any one of claims 1-5, characterized in that a mass ratio of the porous hollow shell W 0 3 nanocrystalline material to the sulfur powder is (0.1 ~ 10 g): (0.1 4.0 g).
The method according to any one of claims 1-6, characterized in that the hexavalent tungsten salt is at least one of tungsten hexachloride, sodium tungstate, ammonium tungstate, and sodium polytungstate.
A W 0 3/WS₂ porous hollow shell nanomaterial obtained by the method according to any one of claims 1-7, in which a porous hollow shell presents a honeycomb structure with a pore size of 0.2 ~ 2.0 m and a shell wall thickness of 40-150 nm, and nanoparticles attached thereon have a particle size of 30-100 nm.
Materials described outside the worked examples.
WO₃/WS₂ porous hollow shell nanomaterial
porous hollow shell WO₃ nanocrystalline material
WO₃
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Pore Size | 0.2–2 µm | WO₃/WS₂ porous hollow shell nanomaterial |
Shell Wall Thickness | 40–150 nm |
Patent
Atlas literature
Patent
Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method for preparing a W 0 3/WS₂ porous hollow shell nanomaterial, comprising the steps of: 1) adding a hexavalent tungsten salt to a sol A comprising mesocarbon microbeads, and stirring to obtain a sol B, wherein a concentration of the mesocarbon microbeads in the sol A is 0.00 2 0.2 g/mL, and a concentration of the W "* in the sol B is 0.01 ~ 2.0 mol/L; 2) drying and grinding the sol B obtained by Step 1, and then heating a resulting powder at 200-500 0 C for 0.5-2 hours to obtain a porous hollow shell W 0 3 nanocrystalline material; and 3) placing the porous hollow shell W 0 3 nanocrystalline material obtained by Step 2 and a sulfur powder separately into a vacuum tube furnace, controlling such that a degree of vacuum is -0.01 to -0.1 MPa and a temperature is 200-500 0 C, and reacting for 0.5-3 hours to sulfurize some W 0 3 of the porous hollow shell W 0 3 nanocrystalline material into WS₂ to obtain a W₀ 3/WS₂ porous hollow shell nanocrystalline material.
The method according to claim 1, characterized in that a solvent of the sol A is anhydrous ethanol, isopropyl alcohol, ethylene glycol, and/or distilled water, the sol A further comprises a dispersant, the dispersant being polyvinyl alcohol, carboxymethylcellulose sodium, lauryl sodium sulfate, and/or polyethylene glycol, and a concentration of the dispersant in the sol A is 0.006 ~ 0.25 g/mL.
The method according to any one of claims 1-3, characterized in that the sol B is obtained by adding the hexavalent tungsten salt to the sol A and stirring, then placing a resulting mixture in a 300 ~ 1000 W ultrasonic generator for ultrasonic vibration and aging for 60 ~ 180 minutes.
The method according to any one of claims 1-4, characterized in that, in Step 2, the sol B is dried in a vacuum drying oven at 40-70 0 C for 2-6 hours, followed by being ground.
The method according to any one of claims 1-5, characterized in that a mass ratio of the porous hollow shell W 0 3 nanocrystalline material to the sulfur powder is (0.1 ~ 10 g): (0.1 4.0 g).
The method according to any one of claims 1-6, characterized in that the hexavalent tungsten salt is at least one of tungsten hexachloride, sodium tungstate, ammonium tungstate, and sodium polytungstate.
A W 0 3/WS₂ porous hollow shell nanomaterial obtained by the method according to any one of claims 1-7, in which a porous hollow shell presents a honeycomb structure with a pore size of 0.2 ~ 2.0 m and a shell wall thickness of 40-150 nm, and nanoparticles attached thereon have a particle size of 30-100 nm.
Materials described outside the worked examples.
WO₃/WS₂ porous hollow shell nanomaterial
porous hollow shell WO₃ nanocrystalline material
WO₃
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Pore Size | 0.2–2 µm | WO₃/WS₂ porous hollow shell nanomaterial |
Shell Wall Thickness | 40–150 nm |
Patent
Atlas literature
Patent
Patent drawings and their descriptions. Click a drawing to enlarge it.
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
A method for preparing a W 0 3/WS₂ porous hollow shell nanomaterial, comprising the steps of: 1) adding a hexavalent tungsten salt to a sol A comprising mesocarbon microbeads, and stirring to obtain a sol B, wherein a concentration of the mesocarbon microbeads in the sol A is 0.00 2 0.2 g/mL, and a concentration of the W "* in the sol B is 0.01 ~ 2.0 mol/L; 2) drying and grinding the sol B obtained by Step 1, and then heating a resulting powder at 200-500 0 C for 0.5-2 hours to obtain a porous hollow shell W 0 3 nanocrystalline material; and 3) placing the porous hollow shell W 0 3 nanocrystalline material obtained by Step 2 and a sulfur powder separately into a vacuum tube furnace, controlling such that a degree of vacuum is -0.01 to -0.1 MPa and a temperature is 200-500 0 C, and reacting for 0.5-3 hours to sulfurize some W 0 3 of the porous hollow shell W 0 3 nanocrystalline material into WS₂ to obtain a W₀ 3/WS₂ porous hollow shell nanocrystalline material.
The method according to claim 1, characterized in that a solvent of the sol A is anhydrous ethanol, isopropyl alcohol, ethylene glycol, and/or distilled water, the sol A further comprises a dispersant, the dispersant being polyvinyl alcohol, carboxymethylcellulose sodium, lauryl sodium sulfate, and/or polyethylene glycol, and a concentration of the dispersant in the sol A is 0.006 ~ 0.25 g/mL.
The method according to any one of claims 1-3, characterized in that the sol B is obtained by adding the hexavalent tungsten salt to the sol A and stirring, then placing a resulting mixture in a 300 ~ 1000 W ultrasonic generator for ultrasonic vibration and aging for 60 ~ 180 minutes.
The method according to any one of claims 1-4, characterized in that, in Step 2, the sol B is dried in a vacuum drying oven at 40-70 0 C for 2-6 hours, followed by being ground.
The method according to any one of claims 1-5, characterized in that a mass ratio of the porous hollow shell W 0 3 nanocrystalline material to the sulfur powder is (0.1 ~ 10 g): (0.1 4.0 g).
The method according to any one of claims 1-6, characterized in that the hexavalent tungsten salt is at least one of tungsten hexachloride, sodium tungstate, ammonium tungstate, and sodium polytungstate.
A W 0 3/WS₂ porous hollow shell nanomaterial obtained by the method according to any one of claims 1-7, in which a porous hollow shell presents a honeycomb structure with a pore size of 0.2 ~ 2.0 m and a shell wall thickness of 40-150 nm, and nanoparticles attached thereon have a particle size of 30-100 nm.
Materials described outside the worked examples.
WO₃/WS₂ porous hollow shell nanomaterial
porous hollow shell WO₃ nanocrystalline material
WO₃
Additional fabrication and treatment steps described in the patent.
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
Pore Size | 0.2–2 µm | WO₃/WS₂ porous hollow shell nanomaterial |
Shell Wall Thickness | 40–150 nm |
sulfur powder
S
mesocarbon microbeads
tungsten hexachloride
WCl₆
sodium tungstate
Na₂WO₄
ammonium tungstate
sodium polytungstate
Nanoparticle Size | 30–100 nm | WO₃/WS₂ porous hollow shell nanomaterial |
Specific Surface Area | 300–700 m²/g | WO₃/WS₂ porous hollow shell nanomaterial |
Duration | 2–6 hours | — |
Thickness | 30–120 nm | — |
Duration | 0.5–3 hours | — |
Duration | 0.5–2 hours | — |
sulfur powder
S
mesocarbon microbeads
tungsten hexachloride
WCl₆
sodium tungstate
Na₂WO₄
ammonium tungstate
sodium polytungstate
Nanoparticle Size | 30–100 nm | WO₃/WS₂ porous hollow shell nanomaterial |
Specific Surface Area | 300–700 m²/g | WO₃/WS₂ porous hollow shell nanomaterial |
Duration | 2–6 hours | — |
Thickness | 30–120 nm | — |
Duration | 0.5–3 hours | — |
Duration | 0.5–2 hours | — |
sulfur powder
S
mesocarbon microbeads
tungsten hexachloride
WCl₆
sodium tungstate
Na₂WO₄
ammonium tungstate
sodium polytungstate
Nanoparticle Size | 30–100 nm | WO₃/WS₂ porous hollow shell nanomaterial |
Specific Surface Area | 300–700 m²/g | WO₃/WS₂ porous hollow shell nanomaterial |
Duration | 2–6 hours | — |
Thickness | 30–120 nm | — |
Duration | 0.5–3 hours | — |
Duration | 0.5–2 hours | — |
sulfur powder
S
mesocarbon microbeads
tungsten hexachloride
WCl₆
sodium tungstate
Na₂WO₄
ammonium tungstate
sodium polytungstate
Nanoparticle Size | 30–100 nm | WO₃/WS₂ porous hollow shell nanomaterial |
Specific Surface Area | 300–700 m²/g | WO₃/WS₂ porous hollow shell nanomaterial |
Duration | 2–6 hours | — |
Thickness | 30–120 nm | — |
Duration | 0.5–3 hours | — |
Duration | 0.5–2 hours | — |