High-surface area functional material coated structures

Patent metadata

Field	Value
Publication number	US-11325114-B2
Application number	US-201916391053-A
Country	US
Kind code	B2
Filing date	Apr 22, 2019
Priority date	Jun 28, 2013
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

Methods for forming an interconnected network of solid material and pores, with metal residing only at the air/solid interface of the interconnected network structure are described. In certain embodiments, nanoparticle decorated sacrificial particles can be used as sacrificial templates for the formation of a porous structure having an interconnected network of solid material and interconnected network of pores. The nanoparticles reside predominantly at the air/solid interface and allow further growth and accessibility of the nanoparticles at defined positions of the interconnected structure. SEM and TEM measurements reveal the formation of 3D interconnected porous structures with nanoparticles residing predominantly at the air/solid interface of the interconnected structure.

First claim

What is claimed is:

1. An interconnected network structure comprising:
an interconnected network of solid material defining an interconnected network of open spaces, the network of open spaces defined by the removal of at least a portion of nanoparticle-modified sacrificial particles; and
nanoparticles residing predominantly at defined positions at an interface between said network of open space and said interconnected network of solid material defining the interconnected network of open spaces.

2. The interconnected network structure of claim 1 , wherein the positions of the nanoparticles are defined by the positions of the nanoparticles on the sacrificial particles.

3. The interconnected network structure of claim 1 , wherein said nanoparticles are selected from the group consisting of metal nanoparticles, semiconductor nanoparticles, metal oxide nanoparticles, mixed metal oxide nanoparticles, metal sulfide nanoparticles, metal chalcogenide nanoparticles, metal nitride nanoparticles, metal pnictide nanoparticles and combinations thereof.

4. The interconnected network structure of claim 1 , wherein said nanoparticles are selected from the group consisting of gold, palladium, platinum, silver, copper, rhodium, ruthenium, rhenium, osmium, iridium, iron, cobalt, nickel, bimetals, metal alloys, and combinations thereof.

5. The interconnected network structure of claim 1 , wherein said nanoparticles are selected from the group consisting of silicon, germanium, tin, silicon doped with group III or V elements, germanium doped with group III or V elements, tin doped with group III or V elements, and combinations thereof.

6. The interconnected network structure of claim 1 , wherein the interconnected network structure comprises catalysts for chemical reactions.

7. The interconnected network structure of claim 1 , wherein said nanoparticles comprise catalysts for chemical reactions.

8. The interconnected network structure of claim 1 , wherein said solid material comprises catalysts for chemical reactions.

9. The interconnected network structure of claim 1 , wherein the interconnected network structure comprises photocatalysts.

10. The interconnected network structure of claim 1 , wherein said nanoparticles comprise photocatalysts.

11. The interconnected network structure of claim 1 , wherein said solid material comprises photocatalysts.

12. The interconnected network structure of claim 1 , wherein the interconnected network structure comprises sensors.

13. The interconnected network structure of claim 1 , wherein said nanoparticles comprise sensors.

14. The interconnected network structure of claim 1 , wherein said nanoparticles comprise quantum dots.

15. The interconnected network structure of claim 1 , wherein the interconnected network structure provides anti-bacterial properties.

16. The interconnected network structure of claim 1 , wherein said nanoparticles provide anti-bacterial properties.

17. The interconnected network structure of claim 1 , wherein the interconnected network structure is a photonic crystal.

18. The interconnected network structure of claim 1 , wherein said nanoparticles are selected from the group consisting of metal nanoparticles, magnetic nanoparticles, semiconductor nanoparticles, metal oxide nanoparticles, mixed metal oxide nanoparticles, metal sulfide nanoparticles, metal chalcogenide nanoparticles, metal nitride nanoparticles, metal pnictide nanoparticles and combinations thereof.

19. The interconnected network structure of claim 1 , wherein said nanoparticles are selected from the group consisting of silica, alumina, beryllia, noble metal oxides, platinum group metal oxides, titania, zirconia, hafnia, molybdenum oxides, tungsten oxides, rhenium oxides, tantalum oxide, niobium oxide, chromium oxides, scandium, yttrium, lanthanum, ceria, and rare earth oxides, thorium and uranium oxides, mixed metal oxides, and combinations thereof.

20. The interconnected network structure of claim 1 , wherein said solid material is selected from the group consisting of silica, titania, alumina, zirconia, hafnia, mixed oxides, oxides, sol-gel derived oxides, polymers, random copolymers, block copolymers, branched polymers, star polymers, dendritic polymers, supramolecular polymers, metals and combinations thereof.

21. The interconnected network structure of claim 1 , wherein said nanoparticles are grown in size up to and including to form a continuous shell residing predominantly at the interface between said network of solid material and said network of open spaces.

22. The interconnected network structure of claim 1 , wherein said nanoparticles are selected from the group consisting of metal nanoparticles, magnetic nanoparticles, semiconductor nanoparticles, metal oxide nanoparticles, mixed metal oxide nanoparticles, metal sulfide nanoparticles, metal chalcogenide nanoparticles, metal nitride nanoparticles, metal pnictide nanoparticles and combinations thereof and wherein the solid material is selected from the group consisting of silica, titania, alumina, zirconia, hafnia, oxides, mixed oxides, inorganic sol-gel derived oxides, polymers, random copolymers, block copolymers, branched polymers, star polymers, dendritic polymers, supramolecular polymers, metals and combinations thereof.

23. The interconnected network structure of claim 1 , wherein said interconnected network of solid material has a disordered structure.

24. The interconnected network structure of claim 1 , wherein said interconnected network of solid material has a structure having short range order.

25. The interconnected network structure of claim 1 , wherein the characteristic size of said open spaces is 50-1000 nm.

26. The interconnected network structure of claim 1 , wherein the characteristic size of said open spaces is 100-500 nm.

27. The interconnected network structure of claim 1 , wherein the characteristic size is defined by a measurement selected from the group consisting of the diameter, longest dimension, shortest dimension and combinations thereof.

28. The interconnected network structure of claim 1 , wherein the characteristic size of said nanoparticles is 1-100 nm.

29. The interconnected network structure of claim 1 , wherein the characteristic size of said nanoparticles is 1-40 nm.

30. The interconnected network structure of claim 1 , wherein the characteristic size of said nanoparticles is 1-15 nm.

31. The interconnected network structure of claim 1 , wherein the characteristic size of said nanoparticles is 1-5 nm.

32. The interconnected network structure of claim 1 , wherein the nanoparticles have more than one characteristic size.

33. The interconnected network structure of claim 1 , wherein the nanoparticles comprise a mixture of different types of nanoparticles.

34. The interconnected network structure of claim 1 , wherein the plurality of sacrificial particles comprises a mixture of sacrificial particles.

35. A method for fabricating an interconnected network structure, the method comprising:
filling interconnected interstitial spaces of an assembly of sacrificial particles with a backfilling material, wherein said sacrificial particles are provided with nanoparticles; and
removing at least a portion of the sacrificial particles to

Assignees

• Harvard College

Inventors

• Aizenberg Joanna
• Shirman Tanya
• Vogel Nicolas
• Kolle Mathias
• Aizenberg Michael

Classifications

• C04B38/0096 Primary

  Pores with coated inner walls · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• C04B2111/0081

  as catalysts or catalyst carriers · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title

• B01J23/52

  Gold · CPC title