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Method for preparing cerium oxide nano-enzyme based on laser liquid phase irradiation and application of cerium oxide nano-enzyme

A technology of cerium oxide and nanozyme, which is applied in chemical instruments and methods, botanical equipment and methods, chemicals for biological control, etc., can solve the problem of lack of high activity cerium oxide nanozyme and achieve excellent visible light response ability , controllable preparation process and simple preparation method

Active Publication Date: 2022-03-18
HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] According to the review, the prior art still lacks highly active cerium oxide nanozymes applied to visible light photocatalytic antibacterial

Method used

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  • Method for preparing cerium oxide nano-enzyme based on laser liquid phase irradiation and application of cerium oxide nano-enzyme
  • Method for preparing cerium oxide nano-enzyme based on laser liquid phase irradiation and application of cerium oxide nano-enzyme
  • Method for preparing cerium oxide nano-enzyme based on laser liquid phase irradiation and application of cerium oxide nano-enzyme

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Preparation of Silver-Cerium Oxide Nanocomposites by Laser Liquid Phase Irradiation

[0032] (1) Precursor material and liquid phase solvent preparation: Commercial silver nanoparticles are provided by Sigma-Aldrich, cerium oxide nanoparticles are provided by Shanghai Macklin Biochemical Technology Co., Ltd., and the ethanol solvent used for dispersion of precursor materials is provided by Sinopharm Chemical Reagents Limited offer.

[0033] (2) Preparation of colloidal suspension: transfer 20mL of ethanol solvent with a pipette gun and place it in a reagent bottle with a capacity of 25mL, weigh 5mg of silver nanoparticles and 5mg of cerium oxide nanoparticles with an electronic balance, and disperse them in the In the ethanol solvent described above, a colloidal suspension was formed.

[0034] (3) Ultrasonic oscillation: place the colloidal suspension in an ultrasonic pot and ultrasonically oscillate for 30 minutes to disperse it evenly.

[0035] (4) Laser ...

Embodiment 2

[0038] The difference between this embodiment and Example 1 is that the quality of silver nanoparticles and cerium oxide nanoparticles in step (2) is different, specifically weighing 2 mg of silver nanoparticles and 8 mg of cerium oxide nanoparticles with an electronic balance, and Disperse it in the ethanol solvent to form a colloidal suspension.

[0039] Test Example

[0040] figure 1 The TEM image of the cerium oxide nanozyme was prepared for Example 1.

[0041] Depend on figure 1It can be seen that after laser liquid phase irradiation, silver nanoparticles are successfully loaded on the surface of bulk cerium oxide nanoparticles.

[0042] figure 2 Prepare the HAADF figure and EDS energy spectrum figure of described cerium oxide nanozyme for embodiment 1, wherein, figure 2 (a) is the distribution HAADF diagram of the hybrid region; figure 2 (b) is the full-element Mapping diagram corresponding to the HAADF diagram; figure 2 (c) in (b) is the energy spectrum of th...

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Abstract

The invention belongs to the technical field of nano-enzyme catalytic antibiosis, and particularly relates to a method for preparing cerium oxide nano-enzyme based on laser liquid phase irradiation and application. The preparation method comprises the following steps: (1) dispersing silver nanoparticles and cerium oxide nanoparticles in a liquid phase solvent to obtain a colloidal suspension; and (2) irradiating the suspension by using a laser beam to weld the silver nanoparticles and the cerium oxide nanoparticles into composite nanoparticles, and carrying out centrifugal separation, cleaning and drying to obtain the cerium oxide nano-enzyme. Silver nanoparticles are loaded on cerium oxide nanoparticles to prepare the silver-cerium oxide nano composite material, so that the visible light response capability of the cerium oxide nanoparticles is improved, the silver nanoparticles are introduced as a new active center, the catalytic activity of the cerium oxide nanoparticles is enhanced, and the silver-cerium oxide nano composite material is applied to the antibacterial field and has good application prospects. The antibacterial rate reaches up to 80% or above, and the antibacterial effect is extremely high.

Description

technical field [0001] The invention belongs to the technical field of nanozyme catalysis and antibacterial, in particular to a method and application for preparing cerium oxide nanozyme based on laser liquid phase irradiation. Background technique [0002] In biomedicine, nanozymes are a class of nanomaterials with enzyme-like functions, which not only have the inherent optical, electrical, and magnetic properties of nanomaterials, but also exhibit excellent catalytic performance. Compared with traditional biological enzymes, it has the advantages of easy preparation, low cost, good stability, and controllable size. widely used in. Among them, the nanozyme used to catalyze antibacterial, also known as nanozyme antibacterial agent, it stimulates a large amount of active oxygen in its surface environment through light. The active oxygen has a strong redox ability and can act on the cell membrane of bacteria, protein, genetic material, etc., causing rapid apoptosis to achiev...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01P1/00B01J23/66B01J35/00B82Y30/00
CPCA01N59/16B01J23/66B82Y30/00B01J35/39Y02A50/30
Inventor 李祥友李阳刘可李殊涵朱晨薇王泽敏卢璟祥王燕
Owner HUAZHONG UNIV OF SCI & TECH
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