Application of nano composite material in degradation of organic toxic molecule and sterilization

A composite material and organic technology, which is applied in the application field of nanocomposite materials in degrading organic toxic molecules and sterilization, can solve the problems of stability and dispersibility of nano-silver antibacterial agents, and reduce production costs, improve time and efficiency. Effect

Inactive Publication Date: 2015-04-22
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its stability and dispersibility have always been a difficult problem in the research of nano silver antibacterial agents.

Method used

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  • Application of nano composite material in degradation of organic toxic molecule and sterilization
  • Application of nano composite material in degradation of organic toxic molecule and sterilization
  • Application of nano composite material in degradation of organic toxic molecule and sterilization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 : Preparation of Ag / AgCl / PDDA / GE Nanocomposites

[0025] Refer to the method of nanomaterials in patent CN 103416436 A to prepare Ag / AgCl / PDDA / GE nanocomposites:

[0026] 1) Graphene oxide (GO) prepared by the Hummers method was prepared into a GO aqueous solution with a concentration of 0.5 mg / mL;

[0027] 2) Weigh 10 mg AgNO 3 Dissolved in 5 mL of deionized water, then mixed the solution with 20 mL of GO solution, and ultrasonically oscillated for 30 min to obtain Ag + / GO precursor solution;

[0028] 3) Add 800 mg of PDDA to three groups of Ag prepared above + / GO precursor solution, stirred for a few minutes, then transferred to the autoclave, set the vacuum oven at 140 °C for 24 h, and then took it out;

[0029] 4) Wash the obtained composite by centrifugation, wash with ethanol several times, and then dry at 30°C. The obtained composite powder is designated as Ag / AgCl / PDDA / GE. Its TEM photo and particle size distribution are shown in figure 1 . ...

Embodiment 2

[0031] Example 2 : Ag / AgCl / PDDA / GE nanomaterials catalyze 3‰H 2 o 2 degrade organic toxic molecules

[0032] Take the common organic toxic molecule methyl orange as an example:

[0033] 1) Through the scanning spectrum of methyl orange (300-800nm), it is obtained that methyl orange has a maximum absorption peak at 464nm;

[0034] 2) Draw a methyl orange standard curve; the maximum absorption wavelength of methyl orange is around 464nm, prepare methyl orange standard solutions of 5, 10, 15, 20, 25, and 30 mg / L (using the mother liquor dilution method), and dilute each standard The absorbance value of the solution at the maximum absorption wavelength and the corresponding concentration value are listed in Table 1, and the concentration C of the methyl orange solution is the abscissa, and the absorbance value A at 464 nm is the ordinate, and a standard curve is made. The curve equation y=0.064x is obtained.

[0035] Table 1. The absorbance value and corresponding concentrat...

Embodiment 3

[0043] Example 3 : Ag / AgCl / PDDA / GE nanomaterials catalyze the degradation of organic toxic molecules by oxygen in the air

[0044] 1) Prepare 10 mL of methyl orange solution with a final concentration of 30mg / L, add a nanocomposite catalyst with a final concentration of 100mg / L to expose the solution to air, incubate at 37°C with shaking at 180rpm, and react under ordinary sunlight. Samples were taken at regular intervals, 200 μL of the solution was taken for centrifugation, the supernatant was taken, and the obtained filtrate was measured with a UV-visible spectrophotometer to measure its absorbance at 464 nm.

[0045] 2) Referring to Example 2, according to the degradation rate formula D O2 =(C 0 -C O2 ) / C 0 ]×100% to calculate the degradation rate D of methyl orange O2 .

[0046] where C 0 and C O2 They are the initial concentration and instantaneous concentration (mg / L) when Ag / AgCl / PDDA / GE nanomaterials catalyze the degradation of methyl orange with oxygen in ai...

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Abstract

The invention relates to application of a nano composite material in degradation of organic toxic molecules and sterilization, belongs to the technical field of antibacterial agents and pollution control, and in particular relates to a nano composite material Ag/AgCl/PDDA/GE formed by modifying silver (Ag) loaded on graphene by using phthalic acid diethylene glycol diacrylic ester (PDDA). Due to the good charge conductivity of graphene and the property that PDDA has positive charges, the catalysis activity and the antibacterial property of the material are improved; the experiment that H2O2 or O2 in air is catalyzed by using Ag/AgCl/PDDA/GE so as to degrade organic toxic molecules shows that the nano material is not only capable of catalyzing H2O2 to degrade the organic toxic molecules within a short time, but also capable of catalyzing oxygen in the air to degrade the organic toxic molecules; the sterilization experiment on ordinary representative pathogenic bacteria and tolerant bacteria shows that the nano material has remarkable lethal effects on gram positive pathogenic bacteria, gram negative pathogenic bacteria and some resistance bacteria.

Description

technical field [0001] The invention relates to the application of a nanocomposite material in degrading organic toxic molecules and sterilizing, and belongs to the field of antibacterial agents and pollution control and technology. Background technique [0002] With the development of economy and the continuous expansion of industrial scale, the treatment of organic toxic molecules in the environment has always been a difficult problem in the treatment of environmental pollution. Graphene is a two-dimensional carbon atom crystal with a thickness of one atom. It has the advantages of extremely low resistivity, extremely fast electron migration, high specific surface area and stable chemical properties, making it a superior optoelectronic material. It is an excellent electron acceptor in the field of batteries and photocatalytic materials. In addition, graphene also has high mechanical strength, large specific surface area, convenient surface treatment and low preparation co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26A01N59/16A01P1/00A01P3/00C02F1/72B01D53/94B01D53/86B01D53/72
Inventor 施海峰陈茹周亚洲王继锋刘海涛贺婷婷杨娟马双彪程晓农
Owner JIANGSU UNIV
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