# US 9,751,761 B2 · Iron chalcogenide nanocomposite and method for preparing same

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- Number: US 9,751,761 B2
- Document ID: US9751761B2
- Status: Granted
- Kind: B2
- Application number: 14/442,251
- Filed: 2013-09-10
- Published: 2016-09-29
- Granted: 2017-09-05
- Earliest claimed: 2012-09-12
- Assignees: Pusan National University Industry-University Cooperation Foundation
- Applicants: Pusan National University Industry-University Cooperation Foundation
- Inventors: Jae-Beom Lee; Xiang Mao
- Web page: https://patentgrep.com/patent/US9751761B2

## CPC

- C01B 19/04: Binary compounds {including binary selenium-tellurium compounds (C01B19/004, C01B19/005, C01B19/007 take precedence)}
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- C01B 19/007: {Tellurides or selenides of metals (C01B19/002 takes precedence)}
- C09K 11/881: {Chalcogenides}
- C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram
- C01P 2002/84: by UV- or VIS- data
- C01P 2002/85: by XPS, EDX or EDAX data
- C01P 2002/88: by thermal analysis data, e.g. TGA, DTA, DSC
- C01P 2004/01: depicted by an image
- C01P 2004/04: obtained by TEM, STEM, STM or AFM
- C01P 2004/52: highly monodisperse size distribution
- C01P 2004/64: Nanometer sized, i.e. from 1-100 nanometer
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- C09K: MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

## Abstract

The present invention relates to an iron chalcogenide nanocomposite with photoluminescent properties. The present invention also relates to a method for preparing the iron chalcogenide nanocomposite. The method includes (a) dissolving a Fe precursor in an organic solvent to form a Fe solution, (b) dissolving a chalcogen powder or a chalcogen precursor in an organic solvent to form a chalcogen solution, (c) dropwise injecting the Fe solution into the chalcogen solution to prepare a mixture solution in which an iron chalcogenide is formed, and (d) purifying the iron chalcogenide from the mixture solution.

## Claims

### Claim 1

A method for preparing an iron chalcogenide nanocomposite, comprising
(a) dissolving a Fe precursor in an organic solvent to form a Fe solution,
(b) dissolving a chalcogen powder or a chalcogen precursor in an organic solvent to form a chalcogen solution,
(c) dropwise injecting the Fe solution into the chalcogen solution to prepare a mixture solution in which an iron chalcogenide is formed, and
(d) purifying the iron chalcogenide from the mixture solution.

### Claim 2 (depends on 1)

The method according to claim 1, wherein, in step (a) or (b), the organic solvent is heated to 100 to 140° C.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the organic solvent used in step (a) or (b) is selected from the group consisting of ether-based compounds (CnOCn, Cn: hydrocarbon, 4≦n≦30), hydrocarbons (CnH2n+2, 7≦n≦30), unsaturated hydrocarbons (CnH2n, 7≦n≦30), and organic acids (CnCOOH, Cn: hydrocarbon, 5≦n≦30).

### Claim 4 (depends on 3)

The method according to claim 3, wherein the ether-based compounds are selected from the group consisting of trioctylphosphine oxide (TOPO), alkylphosphines, octyl ether, benzyl ether, and phenyl ether.

### Claim 5 (depends on 3)

The method according to claim 3, wherein the hydrocarbons are selected from the group consisting of hexadecane, heptadecane, and octadecane.

### Claim 6 (depends on 3)

The method according to claim 3, wherein the unsaturated hydrocarbons are selected from the group consisting of octene, heptadecene, and octadecene.

### Claim 7 (depends on 3)

The method according to claim 3, wherein the organic acids are selected from the group consisting of oleic acid, lauric acid, stearic acid, mysteric acid, and hexadecanoic acid.

### Claim 8 (depends on 3)

The method according to claim 3, wherein, in step (c), the Fe solution is injected dropwise into the chalcogen solution, followed by heating to 250 to 400° C. to prepare a mixture solution in which an iron chalcogenide is formed.

### Claim 9 (depends on 3)

The method according to claim 3, wherein, in step (c), a surfactant is added to and mixed with the mixed solution.

### Claim 10 (depends on 9)

The method according to claim 9, wherein the surfactant is an organic acid selected from the group consisting of oleic acid, lauric acid, stearic acid, mysteric acid, and hexadecanoic acid or is a mixture of these organic acids.

### Claim 11 (depends on 3)

The method according to claim 3, wherein the Fe precursor and the chalcogen precursor are used in a molar ratio of 1:1-2.

### Claim 12 (depends on 3)

The method according to claim 3, wherein the chalcogen is S, Se or Te.

### Claim 13 (depends on 12)

The method according to claim 12, wherein the iron chalcogenide is FeSe or FeSe2.