Title: Porous metal oxide particles and their methods of synthesis

Abstract

Methods are generally disclosed for synthesis of porous particles from a solution formed from a leaving agent, a surfactant, and a soluble metal salt in a solvent. The surfactant congregates to form a nanoparticle core such that the metal salt forms about the nanoparticle core to form a plurality of nanoparticles. The solution is heated such that the leaving agent forms gas bubbles in the solution, and the plurality of nanoparticles congregate about the gas bubbles to form a porous particle. The porous particles are also generally disclosed and can include a particle shell formed about a core to define an average diameter from about 0.5 .mu.m to about 50 .mu.m. The particle shell can be formed from a plurality of nanoparticles having an average diameter of from about 1 nm to about 50 nm and defined by a metal salt formed about a surfactant core.

Inventors:

Chen, Fanglin; Liu, Qiang

Issue Date:

2013-03-12

Research Org.:

Univ. of South Carolina, Columbia, SC (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1176496

Patent Number(s):

8394352

Assignee:

University of South Carolina (Columbia, SC)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES

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B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY

B01J13/20 - After-treatment of capsule walls, e.g. hardening
B01J23/06 - of zinc, cadmium or mercury
B01J23/44 - Palladium
B01J23/745 - Iron
B01J23/75 - Cobalt
B01J23/755 - Nickel
B01J35/004 - {Photocatalysts}
B01J35/08 - Spheres
B01J35/1061 - {2-50 nm}
B01J37/0018 - {Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,

B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES

B82Y30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

C01B13/185 - {Preparing mixtures of oxides}

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01F - COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS

C01F17/241 - containing two or more rare earth metals, e.g. NdPrO3 or LaNdPrO3

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01G - COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F

C01G49/0018 - {Mixed oxides or hydroxides,
C01G49/009 - {Compounds containing, besides iron, two or more other elements, with the exception of oxygen or hydrogen}
C01G49/06 - Ferric oxide
C01G51/006 - {Compounds containing, besides cobalt, two or more other elements, with the exception of oxygen or hydrogen
C01G51/70 - {containing rare earth, e.g. LaCoO3

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2002/52 - containing elements as dopants
C01P2004/34 - hollow
C01P2004/64 - Nanometer sized, i.e. from 1-100 nanometer
C01P2006/12 - Surface area
C01P2006/14 - Pore volume
C01P2006/16 - Pore diameter
C01P2006/17 - Pore diameter distribution
C01P2006/40 - Electric properties

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY

H01M2008/1293 - {Fuel cells with solid oxide electrolytes}
H01M4/9016 - {Oxides, hydroxides or oxygenated metallic salts}

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E60/50 - Fuel cells

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

Y10T428/2991 - Coated
Y10T428/2998 - including synthetic resin or polymer

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DOE Contract Number:  

FG36-08GO88116

Resource Type:

Patent

Resource Relation:

Patent File Date: 2009 Dec 09

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 77 NANOSCIENCE AND NANOTECHNOLOGY