# US 7,608,238 B2 · Nanosheets of MgO processing the 111 plane

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 7,608,238 B2
- Document ID: US7608238B2
- Status: Granted
- Kind: B2
- Application number: 11/356,314
- Filed: 2006-02-17
- Published: 2007-08-23
- Granted: 2009-10-27
- Earliest claimed: 2006-02-17
- Assignees: International University Bremen GmbH
- Inventors: Ryan Richards; Kake Zhu; Christian Kubel
- Web page: https://patentgrep.com/patent/US7608238B2

## CPC

- C01F 5/02: Magnesia
- B01J 21/10: Magnesium; Oxides or hydroxides thereof
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- C07C 45/74: combined with dehydration
- H01M 4/9016: {Oxides, hydroxides or oxygenated metallic salts}
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2002/78: by stacking-plane distances or stacking sequences
- C01P 2002/82: by IR- or Raman-data
- C01P 2002/88: by thermal analysis data, e.g. TGA, DTA, DSC
- C01P 2004/03: obtained by SEM
- C01P 2004/04: obtained by TEM, STEM, STM or AFM
- C01P 2004/20: extending in two dimensions, e.g. plate-like
- C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer
- C01P 2004/64: Nanometer sized, i.e. from 1-100 nanometer
- H01M 8/1011: Direct alcohol fuel cells [DAFC], e.g. direct methanol fuel cells [DMFC]
- Y02E 60/50: Fuel cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- C01F: COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts of peroxyacids C01B15/00; sulfides or polysulfides of magnesium, calcium, strontium, or barium C01B17/42; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds other than ammonia or cyanogen containing nitrogen and non-metals and optionally metals C01B21/082; amides or imides of silicon C01B21/087}; metal {imides or} amides C01B21/092, {C01B21/0923}; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanic acid C01C3/14; salts of cyanamide C01C3/16; thiocyanates C01C3/20; {double sulfates of magnesium with sodium or potassium C01D5/12; with other alkali metals C01D15/00, C01D17/00})
- B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- C07C: ACYCLIC OR CARBOCYCLIC COMPOUNDS
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

Periclase MgO having a nanosheet structure. The distance of the lattice planes in HRTEM is −0.24 nm-0.25 nm. Method of preparing periclase MgO having a nanosheet structure including preparation of Mg(OCH3)2 in methanol solution. 4-methoxy benzy alcohol (MBZ) or 4-nitro benzyl alcohol (NBZ) or a mixture thereof is added in a ration of Mg to MBZ and/or NBZ of at least 1. Water/methanol mixture is added to the system. Solvent removal and calcinations in air is performed of the mixture.

## Claims

### Claim 1

Periclase MgO having a nanosheet structure, the distance of the lattice planes in high resolution transmission electron microscopy (HRTEM) when imaging the nanosheets edge-on being 0.24-0.25 nm, and having the HRTEM images of FIGS. 7a and b and 8a and b and the bright field transmission electron microscopy (BF-TEM) image of FIG. 6.

### Claim 2 (depends on 1)

MgO according to claim 1, wherein the nanosheets have a thickness of less than 10 nm.

### Claim 3 (depends on 2)

MgO according to claim 2, wherein the nanosheets have a thickness of between 3 and 5 mn.