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Porous graphene loaded cerium nano composite antibacterial agent and preparation method thereof

A porous graphene and nanocomposite technology, applied in the directions of botanical equipment and methods, biocides, disinfectants, etc., to achieve the effects of improving stability, reducing use costs, and controlling particle size.

Inactive Publication Date: 2013-05-08
湖南元素密码石墨烯研究院(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is to provide a porous graphene-cerium nanocomposite antibacterial material and its preparation method with controllable cerium particle size, difficult agglomeration and stable antibacterial activity, so as to solve the defects pointed out in the background technology

Method used

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  • Porous graphene loaded cerium nano composite antibacterial agent and preparation method thereof
  • Porous graphene loaded cerium nano composite antibacterial agent and preparation method thereof
  • Porous graphene loaded cerium nano composite antibacterial agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Add 1 g of graphite powder into 25 mL of concentrated sulfuric acid, cool in an ice-salt bath to 0 °C, and slowly add 2.5 g of KMnO 4 , then heated up to 30 ℃, stirred at 60 rpm for 2 h, added 200 mL of water, then added 2 mL of hydrogen peroxide, centrifuged at 600 rpm to remove impurities, treated with ultrasonic (400 W, 50 Hz) for 1 h, and then microwaved (800 W, 2450 Hz) for 1 h to obtain graphene oxide, then add 5 g NaOH, and heat in a tube furnace at 760 °C for 1 h under nitrogen protection to obtain porous graphene; the specific surface area of ​​porous graphene is 350 m 2 / g; its conductivity is 60 S m -1 ; The weight loss at 900 ℃ is 4 wt%.

[0023] Take 10 mL of the prepared porous graphene solution (10 mg / mL) and disperse it in 40 mL of ultrapure water, and ultrasonicate the water bath for two hours to obtain a uniform and stable dispersion, then add 43.4 mg of cerium nitrate and oscillate with ultrasonic Until the solution is clear and transparent without ...

Embodiment 2

[0027] Add 1 g of graphite powder into 25 mL of concentrated sulfuric acid, cool in an ice-salt bath to 0 °C, and slowly add 2.6 g of KMnO 4 , then heated up to 30 ℃, stirred at 60 rpm for 2 h, added 200 mL of water, then added 3 mL of hydrogen peroxide, centrifuged at 600 rpm to remove impurities, treated with ultrasonic (400 W, 50 Hz) for 1 h, and then microwaved (800 W, 2450 Hz) for 1 h to obtain graphene oxide, then add 4 g NaOH, and heat in a tube furnace at 760 °C for 1 h under nitrogen protection to obtain porous graphene; the specific surface area of ​​porous graphene is 370 m 2 / g; its conductivity is 50 S m -1 ; The weight loss at 900 ℃ was 4.5 wt%.

[0028] Take 10 mL of the prepared porous graphene solution (10 mg / mL) and disperse it in 40 mL of ultrapure water, and ultrasonicate the water bath for two hours to obtain a uniform and stable dispersion, then add 86.8 mg of cerium nitrate, and oscillate with ultrasonic Until the solution is clear and transparent with...

Embodiment 3

[0031] Add 1 g of graphite powder into 25 mL of concentrated sulfuric acid, cool in an ice-salt bath to 0 °C, and slowly add 2.7 g of KMnO 4 , then heated up to 30 ℃, stirred at 60 rpm for 2 h, added 200 mL of water, then added 2 mL of hydrogen peroxide, centrifuged at 600 rpm to remove impurities, treated with ultrasonic (400 W, 50 Hz) for 1 h, and then microwaved (800 W, 2450 Hz) for 1 h to obtain graphene oxide, then add 3 g NaOH, and heat in a tube furnace at 760 °C for 1 h under nitrogen protection to obtain porous graphene; the specific surface area of ​​porous graphene is 390 m 2 / g; its conductivity is 40 S m -1 ; The weight loss at 900 ℃ is 5 wt%.

[0032] Take 10 mL of the prepared porous graphene solution (10 mg / mL) and disperse it in 40 mL of ultrapure water, and ultrasonicate the water bath for two hours to obtain a uniform and stable dispersion, then add 434 mg of cerium nitrate and oscillate with ultrasonic Until the solution is clear and transparent without p...

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Abstract

The invention discloses a porous graphene loaded cerium nano composite antibacterial agent which is compounded from porous graphene and cerium, wherein nano cerium is deposited on a porous graphene layer; the particle size of the nano cerium is within 5-20nm; the specific surface area of the porous graphene is 350-450m<2> / g; the conductivity of the porous graphene is 20-60S.m<-1>; and the weightlessness of the porous graphene within 900 DEG C is 4-6wt%. The invention further discloses a preparation method of the porous graphene loaded cerium nano composite antibacterial agent. The method comprises the preparation of the porous graphene and the preparation of the porous graphene loaded cerium. The porous graphene loaded cerium has longer antimicrobial activity, can improve the security and reduce the use cost, and has wide prospects in industrial applications.

Description

technical field [0001] The invention belongs to the field of composite antibacterial materials, and relates to a porous graphene-loaded cerium nanocomposite antibacterial agent and a preparation method thereof. Background technique [0002] The development and application of antibacterial materials has set up a green barrier for the protection of human health, which is of great significance for improving the living environment of human beings, reducing diseases and protecting the health of the whole people. Humans have long recognized that certain metals such as silver, copper, zinc, mercury, bismuth, cadmium, etc. have antibacterial effects and are safe to humans and animals (Fumiyasu Ishiguro, Takeshi Nishkawa, Ryozo Amano, et al. Development of nickel- chromium coating with antibacterial performance [J]. Materia Japan, 1999, 38(1): 64.). Compared with organic antibacterial agents, metal antibacterial agents have the characteristics of high temperature resistance, broad-s...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/08A01P1/00
Inventor 夏燎原谭彬叶国富邓凌峰袁志庆何新快刘奇龙
Owner 湖南元素密码石墨烯研究院(有限合伙)
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