Nanoparticles including metal oxide having catalytic activity
View Patent ↗Core-shell nanoparticles having a core material and a mesoporous silica shell, and a method for manufacturing the core-shell nanoparticles are provided.
1. A method for preparing a core-shell nanoparticle comprising:
providing a core material including a metal oxide having catalytic activity; and coating the surface of the metal oxide with silica to form the core-shell nanoparticle, wherein the core-shell nanoparticle includes a mesoporous shell, and wherein the size of the core material comprises a range from about 5 nm to about 100 nm, and wherein the core material comprises a metal core and a metal oxide shell.
2. The method of claim 1 , further comprising
partially etching a pore channel into the mesoporous shell and/or a cavity into the core material using a basic buffer solution and/or an inorganic base.
3. The method of claim 2 , wherein partially etching comprises partially etching at a pH of about 7.5 to about 10.
4. The method of claim 1 , wherein the size of the core-shell nanoparticle comprises a range from about 10 nm to about 100 nm.
5. The method of claim 4 , wherein partially etching comprises partially etching at a pH of about 7.5 to about 10.
6. The method of claim 1 , wherein the average size of a pore of the mesoporous shell is about 3 nm or less.
7. The method of claim 1 , wherein the metal oxide comprises an element selected from the group consisting of Al, Ti, V, Mn, Fe, Co, Ni, Cu Zn, Ga, Y, Zr, Sn, Ce, and a lanthanoid.
8. A method for preparing a core-shell nanoparticle comprising:
providing a core material including a metal oxide having catalytic activity; and coating the surface of the metal oxide with silica to form the core-shell nanoparticle, wherein the core-shell nanoparticle includes a mesoporous shell, and wherein the size of the core material comprises a range from about 5 nm to about 100 nm, and wherein the core material comprises a hollow nanosphere having a metal oxide and a cavity.
9. The method of claim 8 , wherein the hollow nanosphere includes a metal attached to the inner surface of the hollow nanosphere.
10. The method of claim 8 , further comprising
partially etching a pore channel into the mesoporous shell and/or a cavity into the core material using a basic buffer solution and/or an inorganic base.
11. The method of claim 8 , wherein the metal oxide comprises an element selected from the group consisting of Al, Ti, V, Mn, Fe, Co, Ni, Cu Zn, Ga, Y, Zr, Sn, Ce, and a lanthanoid.
12. The method of claim 8 , wherein the average size of a pore of the mesoporous shell is about 3 nm or less.
13. A method for preparing a core-shell nanoparticle comprising:
providing a core material including a metal oxide having catalytic activity; and
coating the surface of the metal oxide with silica to form the core-shell nanoparticle, wherein the core-shell nanoparticle includes a mesoporous shell, and wherein the size of the core-shell nanoparticle comprises a range from about 10 nm to about 200 nm, and wherein the core material comprises a metal core and a metal oxide shell.
14. The method of claim 13 , further comprising
partially etching a pore channel into the mesoporous shell and/or a cavity into the core material using a basic buffer solution and/or an inorganic base.
15. The method of claim 14 , wherein partially etching comprises partially etching at a pH of about 7.5 to about 10.
16. The method of claim 13 , wherein the average size of a pore of the mesoporous shell is about 3 nm or less.
17. The method of claim 13 , wherein the size of the core-shell nanoparticle comprises a range from about 10 nm to about 100 nm.
18. The method of claim 13 , wherein the metal oxide comprises an element selected from the group consisting of Al, Ti, V, Mn, Fe, Co, Ni, Cu Zn, Ga, Y, Zr, Sn, Ce, and a lanthanoid.
19. A method for preparing a core-shell nanoparticle comprising:
providing a core material including a metal oxide having catalytic activity; and
coating the surface of the metal oxide with silica to form the core-shell nanoparticle, wherein the core-shell nanoparticle includes a mesoporous shell, and wherein the size of the core-shell nanoparticle comprises a range from about 10 nm to about 200 nm, and wherein the core material comprises a hollow nanosphere having a metal oxide and a cavity.
20. The method of claim 19 , wherein the hollow nanosphere includes a metal attached to the inner surface of the hollow nanosphere.
21. The method of claim 19 , further comprising
partially etching a pore channel into the mesoporous shell and/or a cavity into the core material using a basic buffer solution and/or an inorganic base.
22. The method of claim 19 , wherein the metal oxide comprises an element selected from the group consisting of Al, Ti, V, Mn, Fe, Co, Ni, Cu Zn, Ga, Y, Zr, Sn, Ce, and a lanthanoid.
23. The method of claim 19 , wherein the average size of a pore of the mesoporous shell is about 3 nm or less.