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 core-shell nanoparticle comprising:
a core material comprising a metal core and a metal oxide shell, wherein the metal oxide shell has catalytic activity; and
a mesoporous silica layer at least partially encapsulating the core material, wherein the core-shell nanoparticle has a size from about 10 nm to about 200 nm.
2. The core-shell nanoparticle of claim 1 , wherein the core material has a size from about 5 nm to about 100 nm.
3. The core-shell nanoparticle of claim 1 , wherein the mesoporous silica layer comprises one or more pore channels.
4. The core-shell nanoparticle of claim 3 , wherein the pore channels have an average size of about 3 nm or less.
5. The core-shell nanoparticle of claim 1 , wherein the mesoporous silica layer is partially etched.
6. The core-shell nanoparticle of claim 1 , wherein the mesoporous silica layer has a specific surface area of about 200 m 2 /g to about 3000 m 2 /g.
7. The core-shell nanoparticle of claim 1 , wherein the metal oxide shell comprises at least one of TiO 2 , CeO 2 , V 2 O 3 , ZnO, ZrO 2 , SnO 2 , WO 3 , Fe 2 O 3 , V 2 O 2 , or MoO 3 .
8. The core-shell nanoparticle of claim 1 , wherein the metal core comprises at least one of Mn, Fe, Co, Ni, Cu, Zn, Ru, Rh, Pd, Ag, In, Sn, Re, Os, Ir, Pt, Au, a lanthanoid, or alloys thereof.
9. The core-shell nanoparticle of claim 1 , wherein the metal core has a size from about 1 nm to about 50 nm.
10. A core-shell nanoparticle comprising:
a hollow nanosphere comprising a metal oxide shell and a cavity, wherein the metal oxide shell has catalytic activity; and
a mesoporous silica layer at least partially encapsulating the hollow nanosphere, wherein the core-shell nanoparticle has a size from about 10 nm to about 200 nm.
11. The core-shell nanoparticle of claim 10 , wherein the hollow nanosphere comprises a metal attached to an inner surface of the hollow nanosphere.
12. The core-shell nanoparticle of claim 10 , wherein the metal attached to the inner surface of the hollow nanosphere comprises at least one of Cu, Ag, Au, Ni, Pt, or Pd.
13. The core-shell nanoparticle of claim 10 , wherein the hollow nanosphere has a size from about 5 nm to about 100 nm.
14. The core-shell nanoparticle of claim 10 , wherein the mesoporous silica layer comprises one or more pore channels.
15. The core-shell nanoparticle of claim 14 , wherein the pore channels have an average size of about 3 nm or less.
16. The core-shell nanoparticle of claim 10 , wherein the mesoporous silica layer is partially etched.
17. The core-shell nanoparticle of claim 10 , wherein the mesoporous silica layer has a specific surface area of about 200 m 2 /g to about 3000 m 2 /g.
18. The core-shell nanoparticle of claim 10 , wherein the metal oxide shell comprises at least one of TiO 2 , CeO 2 , V 2 O 3 , ZnO, ZrO 2 , SnO 2 , WO 3 , Fe 2 O 3 , V 2 O 2 , or MoO 3 .
19. A core-shell nanoparticle comprising:
a metal core comprising at least one of Mn, Fe, Co, Ni, Cu, Zn, Ru, Rh, Pd, Ag, In, Sn, Re, Os, Ir, Pt, Au, a lanthanoid, or alloys thereof;
a metal oxide layer at least partially encapsulating the metal core, wherein the metal oxide layer comprises at least one of TiO 2 , CeO 2 , V 2 O 3 , ZnO, ZrO 2 , SnO 2 , WO 3 , Fe 2 O 3 , V 2 O 2 , or MoO 3 ; and
a mesoporous silica layer at least partially encapsulating the metal oxide layer.
20. The core-shell nanoparticle of claim 19 , wherein the mesoporous silica layer is disposed at an outer surface of the core-shell nanoparticle.