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Co-doped ZnO quantum dot/attapulgite nano composite antibacterial agent and preparation method thereof

An attapulgite and nanocomposite technology, applied in the directions of botanical equipment and methods, biocides, disinfectants, etc., can solve the problems of poor biocompatibility, easy recombination of electrons and holes, unfavorable and efficient antibacterial properties, etc., and achieve antibacterial properties. High activity and good biocompatibility

Inactive Publication Date: 2019-12-03
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relevant studies have shown that the smaller the size of nano-ZnO, the better the antibacterial performance, but the small-sized nano-ZnO itself has a large specific surface area, is easy to agglomerate, and has a wide band gap, poor biocompatibility, and easy electron-hole recombination. It is not conducive to its high-efficiency antibacterial performance

Method used

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  • Co-doped ZnO quantum dot/attapulgite nano composite antibacterial agent and preparation method thereof
  • Co-doped ZnO quantum dot/attapulgite nano composite antibacterial agent and preparation method thereof
  • Co-doped ZnO quantum dot/attapulgite nano composite antibacterial agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Weigh 4.5mmol of zinc acetate dihydrate and 0.032mmol of cobalt acetate tetrahydrate and disperse them in 100mL of absolute ethanol. After stirring evenly, add 395mg of APT, pour them into a three-necked flask, and heat the reaction in a water bath at 70°C for 1 hour to obtain zinc, Cobalt and attapulgite mixed precursor solution; add 6.3mmol potassium hydroxide to 50mL ethanol solution, stir magnetically for 20min, then add the resulting alkali solution dropwise to the previously prepared zinc, cobalt, attapulgite mixed precursor solution After mixing evenly, stir magnetically for 30min, heat and react in a water bath at 95°C for 5h, add 100mL deionized water until the solution turns milky white after the reaction, stir magnetically for 20min at room temperature, let stand, wash, and centrifuge to obtain attapulgite-loaded cobalt Doped zinc oxide quantum dot nanocomposite antibacterial agent.

[0022] Such as figure 1 As shown, it can be seen from the figure that the ...

Embodiment 2

[0024] Weigh 4.5mmol of zinc acetate dihydrate and 0.032mmol of cobalt acetate tetrahydrate and disperse them in 100mL of absolute ethanol. After stirring evenly, add 593mg of APT, pour them into a three-necked flask, and heat the reaction in a water bath at 90°C for 2 hours to obtain zinc, Cobalt and attapulgite mixed precursor solution; add 6.3mmol potassium hydroxide to 50mL ethanol solution, stir magnetically for 20min, then add the resulting alkali solution dropwise to the previously prepared zinc, cobalt, attapulgite mixed precursor solution After mixing evenly, stir magnetically for 30min, heat in a water bath at 95°C for 5h, add 100mL deionized water until the solution turns milky white after the reaction, stir magnetically for 20min at room temperature, let stand, wash, and centrifuge to obtain concave Co-doped ZnO Quantum dot / attapulgite nanocomposite antibacterial agent.

Embodiment 3

[0026] Weigh 4.5mmol of zinc acetate dihydrate and 0.032mmol of cobalt acetate tetrahydrate and disperse them in 100mL of absolute ethanol. After stirring evenly, add 494mg of APT, pour it into a three-necked flask, and heat it in a water bath at 85°C for 2.5h to obtain zinc. , cobalt, attapulgite mixed precursor solution; add 6.3mmol potassium hydroxide to 50mL ethanol solution, after magnetic stirring for 20min, add the resulting alkali solution dropwise to the zinc, cobalt, attapulgite mixed precursor solution prepared earlier After mixing evenly, stir magnetically for 30min, heat and react in a water bath at 95°C for 5h, add 100mL deionized water until the solution turns milky white after the reaction, stir magnetically for 20min at room temperature, let stand, wash, and centrifuge to obtain Co-doped ZnO Quantum dot / attapulgite nanocomposite antibacterial agent.

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Abstract

The invention discloses a Co-doped ZnO quantum dot / attapulgite nano composite antibacterial agent and a preparation method thereof. According to the preparation method, APT is used as a carrier, cobalt acetate tetrahydrate is used as a dopant, a novel photoelectric functional material ZnO quantum dot is used as a main antibacterial component, the size limitation effect and the quantum confinementeffect of ZnO quantum dot are utilized, and combination with coupling of ZnO quantum dot and Co < 2 + > is adopted, so that the combination of ZnO surface photo-induced electrons and holes is effectively inhibited; the surface of the attapulgite is loaded with the Co-doped ZnO quantum dots; under the effect of the huge specific surface area and high absorptivity of APT, bacteria are adsorbed to the surfaces, and then cobalt (Co) doped zinc oxide quantum dots (ZnO QDs) cooperatively loaded on attapulgite surfaces and among pore channels are provided with efficient antibacterial effects. The preparation method has the advantages of being safe, environmentally friendly, high in drug resistance and the like, and the inhibition rate of the prepared nano-composite antibacterial agent on escherichia coli can reach 85.71%.

Description

technical field [0001] The invention relates to a high-efficiency antibacterial agent, in particular to a Co-doped ZnO quantum dot / attapulgite nanocomposite antibacterial agent and a preparation method thereof. Background technique [0002] In recent years, due to insufficient anticipation and poor prevention of the negative impact of highly developed industries, people have led to three global crises: resource shortage, environmental pollution, and ecological destruction. At the same time, the improper use of antimicrobials has led to the emergence of various pathogenic bacteria, fungi and viruses, as well as the increase of drug-resistant bacteria and the emergence of super-resistant bacteria. The research and development of various antibacterial agents has become a current research hotspot, among which inorganic antibacterial materials have received more and more attention because of their low price, high safety performance, non-toxicity, and ability to efficiently and co...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N25/08A01P1/00
CPCA01N25/08A01N59/16
Inventor 刘俊莉张凯涛高朝阳刘辉李军奇
Owner SHAANXI UNIV OF SCI & TECH
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