Method for preparing metal/molybdenum oxide nanoparticles

Patent metadata

Field	Value
Publication number	US-10529460-B2
Application number	US-201815865971-A
Country	US
Kind code	B2
Filing date	Jan 9, 2018
Priority date	Sep 4, 2017
Publication date	Jan 7, 2020
Grant date	Jan 7, 2020

Abstract

Provided is a method for preparing metal/molybdenum oxide nanoparticles, the method including: preparing polycrystalline molybdenum oxide particles; and obtaining metal-doped molybdenum oxide nanoparticles by dissolving the polycrystalline molybdenum oxide particles and a metal precursor in a first solvent, and then performing a solvothermal reaction.

First claim

What is claimed is:

1. A method for preparing metal/molybdenum oxide nanoparticles, the method comprising:
(a) preparing polycrystalline molybdenum oxide particles; and
(b) obtaining metal-doped molybdenum oxide nanoparticles by dissolving the polycrystalline molybdenum oxide particles and a metal precursor having a concentration of 1 to 10 wt % in a first solvent, and then performing a solvothermal reaction,
wherein the metal precursor comprises one selected from a group consisting of Ti, Zr, Mn, Fe, Co, Cu, Ni, Pd, Ag, Au, and a mixture thereof, and
wherein the metal-doped molybdenum oxide nanoparticles are represented by the following Chemical Formula 1:
M/MoO 3-X , wherein 0<X≤1.

2. The method of claim 1 , wherein Step (a) comprises:
(a1) preparing a precursor solution by dissolving a molybdenum salt in a second solvent;
(a2) generating an aerosol by applying ultrasonic waves to the precursor solution, and spraying the aerosol into a reactor by using a carrier gas; and
(a3) obtaining the polycrystalline molybdenum oxide particles by pyrolyzing the aerosol.

3. The method of claim 2 , wherein the molybdenum salt is one selected from a group consisting of lithium molybdate (Li 2 MoO 4 ), calcium molybdate (CaMoO 4 ), potassium molybdate (K 2 MoO 4 ), sodium molybdate (NaMoO 4 ), molybdenum chlorides (MoCl 5 , MoCl 3 , MoOCl 4 ), ammonium molybdate ((NH 4 ) 6 Mo 7 O 24 .H 2 O), and a mixture thereof.

4. The method of claim 2 , wherein the second solvent is one selected from a group consisting of methanol, ethanol, propanol, butanol, methoxyethanol, ethoxyethanol, lactones, acetonitrile, n-methyl-2-pyrrolidone (NMP), formic acid, nitromethane, acetic acid, dimethyl sulfoxide, distilled water, and a mixture thereof.

5. The method of claim 2 , wherein a concentration of the precursor solution is 0.05 to 0.5 M.

6. The method of claim 2 , wherein the carrier gas is one selected from a group consisting of air, nitrogen, oxygen, helium, argon, and a mixture thereof.

7. The method of claim 2 , wherein in Step (a3), a pyrolysis temperature of pyrolyzing the aerosol is 450 to 650° C.

8. The method of claim 2 , wherein in Step (a3), the polycrystalline molybdenum oxide particles are molybdenum trioxide (MoO3).

9. The method of claim 1 , wherein the first solvent is a mixture of distilled water and a reducing solvent.

10. The method of claim 9 , wherein the first solvent is prepared by mixing the distilled water and the reducing solvent at a weight ratio of 1 to 3:1.

11. The method of claim 1 , wherein in Step (b), a temperature of the solvothermal reaction is 100 to 300° C.

12. The method of claim 1 , wherein in Step (b), a time of the solvothermal reaction is 1 to 12 hours.

Assignees

• Univ Industry Cooperation Group Kyung Hee Univ

Inventors

• Kim Jin Soo
• Im Sang Hyuk
• Heo Jin Hyuck
• Im Kyung Min
• Kim Woo Sik

Classifications

• B01J23/28

  Molybdenum · CPC title

• C01F11/00

  Compounds of calcium, strontium, or barium (C01F7/00 takes precedence) · CPC title

• C01P2004/61

  Micrometer sized, i.e. from 1-100 micrometer · CPC title

• C09C1/0003

  Compounds of molybdenum (C09C1/0015 takes precedence) · CPC title

• B01J23/882

  and cobalt · CPC title