Preparation method and use of cobalt nanoparticle/boron nitride composite

Patent metadata

Field	Value
Publication number	US-12478957-B2
Application number	US-202218147243-A
Country	US
Kind code	B2
Filing date	Dec 28, 2022
Priority date	Feb 23, 2022
Publication date	Nov 25, 2025
Grant date	Nov 25, 2025

Abstract

The present disclosure belongs to the technical field of sewage treatment, and relates to a preparation method and use of a cobalt nanoparticle/boron nitride composite. The preparation method includes the following steps: dissolving 2-methylimidazole and boric acid in deionized water, and stirring to obtain a solution A; dissolving Co(NO 3 ) 2 ·6H 2 O and Zn(NO) 3 ·6H 2 O in deionized water, and conducting ultrasonic dispersion to obtain a solution B; transferring the solution B into the solution A, and stirring to form a clear and transparent solution; transferring the clear and transparent solution into a container lined with Teflon, and conducting a reaction; subjecting an obtained product to cooling, filtration, washing, and drying sequentially to obtain a precursor of the composite; and conducting roasting on the precursor in an ammonia gas atmosphere to obtain the cobalt nanoparticle/boron nitride composite with a spherical superstructure.

First claim

What is claimed is:

1 . A preparation method of a cobalt nanoparticle/boron nitride composite, comprising the following steps:
S1, preparation of a solution A: dissolving 2-methylimidazole and boric acid at a molar ratio of (0.5-1):(1-2) in deionized water, and stirring for 15 min to obtain the solution A; S2, preparation of a solution B: dissolving Co(NO 3 ) 2 ·6H 2 O and Zn(NO) 3 ·6H 2 O at a molar ratio of (0.5-1):(1-2) in deionized water, and conducting ultrasonic dispersion for 15 min to obtain the solution B; S3, preparation of a precursor: transferring the solution B into the solution A, and stirring for 15 min to form a clear and transparent solution; transferring the clear and transparent solution into a container lined with Teflon, and conducting a reaction at 150° C. for 6 h to 18 h; subjecting an obtained product to cooling, filtration, washing, and drying sequentially to obtain the precursor of the cobalt nanoparticle/boron nitride composite; and S4, conducting roasting on the precursor obtained in step S3 at 800° C. to 1,200° C. for 2 h to 5 h in an ammonia gas atmosphere to obtain the cobalt nanoparticle/boron nitride composite with a spherical superstructure.

2 . The preparation method of the cobalt nanoparticle/boron nitride composite according to claim 1 , wherein in step S1, 10 mL to 20 mL of the deionized water is used for every 15 mmol of the 2-methylimidazole, and wherein in step S2, 10 mL to 20 mL of the deionized water is used for every 2.6 mmol of the Zn(NO 3 ) 2 ·6H 2 O.

3 . The preparation method of the cobalt nanoparticle/boron nitride composite according to claim 1 , wherein in step S3, the cooling, filtration, washing, and drying specifically comprises: cooling the clear and transparent solution to room temperature, and conducting filtration to collect a solid product; washing the solid product 3 to 5 times with deionized water; and drying a resulting washed solid product in an oven at 50° C. to 80° C. for 6 h to 12 h.

4 . The preparation method of the cobalt nanoparticle/boron nitride composite according to claim 1 , wherein in step S3, the container is a stainless steel autoclave lined with the Teflon.

Assignees

• Univ China Petroleum East China

Inventors

• Dai Pengcheng
• Feng Yan
• Li Yang
• Zhao Xuebo
• Yang Dehong
• Gan Hongyu
• Tian Yubin

Classifications

• B01J35/40

  characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77) · CPC title

• B01J35/51

  Spheres · CPC title

• C02F2101/38

  containing nitrogen · CPC title

• C02F2101/345

  Phenols · CPC title

• C02F2101/308

  Dyes; Colorants; Fluorescent agents · CPC title