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A kind of preparation method and application of silver-zinc oxide composite nanoparticles

A composite nanoparticle and zinc oxide technology, applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, nanotechnology, etc., can solve the problems of undiscovered synthesis process, high reaction temperature surfactant, etc., and achieve strong Raman scattering enhancement effect, Raman spectrum intensity enhancement, effect of mild conditions

Active Publication Date: 2022-05-20
JIMEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the common synthesis methods of nano-scale zinc oxide particles require high reaction temperature and the participation of surfactants, and no simple and efficient synthesis process has been found.

Method used

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  • A kind of preparation method and application of silver-zinc oxide composite nanoparticles
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  • A kind of preparation method and application of silver-zinc oxide composite nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]Prepare 200mL of zinc nitrate hexahydrate solution with a concentration of 0.006g / mL, preheat to 40°C in a magnetic stirring oil bath and keep stirring at a speed of 200rpm for 10min; then add 1.5mL of ammonia water with a concentration of 28wt% to the solution, and Set the temperature to 50°C and keep the rotation speed of 200rpm for 10h; after the reaction, cool the white turbid solution to room temperature, then centrifuge at 8000rpm for 15min, discard the supernatant, and deionize the collected white precipitate with deionized water. Washing; continue to centrifuge under the same conditions, discard the supernatant, and wash the white precipitate with absolute ethanol, centrifuge again at 8000rpm for 15min, wash with deionized water and collect the white precipitate after centrifugation, which is pure zinc oxide Particles are dried at 50° C. for 8 hours to finally obtain nanometer zinc oxide particles.

[0034] Take 0.3g of the above-mentioned nano-zinc oxide particl...

Embodiment 2

[0037] Prepare 200mL of zinc nitrate hexahydrate solution with a concentration of 0.004g / mL, preheat to 40°C in a magnetically stirred water bath and keep stirring at 200rpm for 10min; then add 0.5mL of 25wt% ammonia water to the solution, and set the temperature to at 40°C, keep the rotation speed of 200rpm for 16h; after the reaction, cool the white turbid solution to room temperature, then centrifuge at 8000rpm for 15min, discard the supernatant, and wash the collected white precipitate with deionized water; Continue to centrifuge under the same conditions, discard the supernatant, and use absolute ethanol to wash the white precipitate, centrifuge again at 8000rpm for 15 minutes, use deionized water to wash and collect the white precipitate after centrifugation, which is pure zinc oxide particles. The precipitate was dried at 50° C. for 8 hours to finally obtain nanometer zinc oxide particles.

[0038] Take 0.2g of the above-mentioned nano-zinc oxide particles, 0.5g PVP K60...

Embodiment 3

[0040] Prepare 200mL of zinc nitrate hexahydrate solution with a concentration of 0.01g / mL, preheat to 40°C in a magnetically stirred water bath and keep stirring at 200rpm for 10min; then add 3mL of 28wt% ammonia water to the solution and set the temperature to 45°C, Keep the speed of reaction at 200rpm for 18h; after the reaction, cool the obtained white turbid liquid to room temperature, then centrifuge at 8000rpm for 15min, discard the supernatant, and wash the collected white precipitate with deionized water; continue centrifugation under the same conditions , discard the supernatant, and wash the white precipitate with absolute ethanol, centrifuge again at 8000rpm for 15min, wash with deionized water and collect the white precipitate after centrifugation, which is pure zinc oxide particles. The precipitate was dried for 8 hours to finally obtain nanometer zinc oxide particles.

[0041] Take 0.5 g of the above-mentioned nano-zinc oxide particles, 2.5 g of PVP (K30:K90=1:1...

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Abstract

The invention relates to a method for preparing silver-zinc oxide composite nanoflowers, which belongs to the field of nanomaterials; the specific preparation method is as follows: dissolving zinc nitrate hexahydrate in deionized water, heating and stirring, and then adding ammonia water to the zinc nitrate solution to maintain the temperature And continue to stir, centrifuge the obtained turbid solution successively, wash with ethanol, wash with distilled water, and obtain nano-zinc oxide particles after vacuum drying; then dissolve nano-zinc oxide particles, polyvinylpyrrolidone and glucose in deionized water respectively, heat and stir, and add nitric acid The silver solution is stirred, centrifuged and cleaned, and dried in a vacuum to obtain a black powder, which is a silver-zinc oxide composite nanoparticle; the present invention obtains a silver-zinc oxide composite through a mild and cheap two-step wet chemical synthesis method, and the obtained The compound has good dispersion and good Raman scattering enhancement effect, and can be applied to the detection of organic pollutants in food and environment.

Description

technical field [0001] The invention relates to a preparation method and application of silver-zinc oxide composite nanoparticles, belonging to the field of nanomaterial preparation and application. Background technique [0002] The improvement of people's living standards has not only increased consumers' demand for high-quality food, medicine and living environment, but also put forward higher requirements for the detection technology of pesticide residues and other pollutant residues. During the production process, crops are easily affected by insects and weeds, which ultimately affect the yield. In order to ensure the smooth growth of crops, pesticides such as insecticides, herbicides and growth regulators are widely used in agriculture. However, pesticides such as chlorpyrifos, thiram, and 2,4-D have been proven to have potential threats to human health such as carcinogenicity, chromosome damage, and arteriosclerosis; therefore, if pesticides in agricultural products ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/054B22F1/18B82Y30/00B82Y40/00C01G9/02G01N21/65
CPCG01N21/658B82Y30/00B82Y40/00C01G9/02B22F9/24C01P2004/30C01P2004/80B22F1/17Y02A50/30
Inventor 焦天慧陈全胜许艺李欢欢程武欧阳琴
Owner JIMEI UNIV
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