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One-step synthesized SiO2 nanocapsule inlaid with Ag nanoparticles and preparation method of SiO2 nanocapsule

A nanoparticle and nanocapsule technology, applied in the field of nanomaterials and composite materials, can solve the problems of cumbersome steps and difficult control, and achieve the effects of saving raw materials, simplifying operations, and having great commercial prospects.

Inactive Publication Date: 2017-12-12
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Patent application number 200710023920.5 discloses a composite of silver nanoparticles and polymer microsphere carrier, which not only requires acrylonitrile and styrene as the first and second monomers, dispersion stabilizer and other synthetic microspheres, but also needs to be added separately Alcohol as a reducing agent, the steps are cumbersome and difficult to control

Method used

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  • One-step synthesized SiO2 nanocapsule inlaid with Ag nanoparticles and preparation method of SiO2 nanocapsule
  • One-step synthesized SiO2 nanocapsule inlaid with Ag nanoparticles and preparation method of SiO2 nanocapsule
  • One-step synthesized SiO2 nanocapsule inlaid with Ag nanoparticles and preparation method of SiO2 nanocapsule

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Embodiment 1

[0025] A method for synthesizing SiO nanocapsules inlaid with Ag nanoparticles in one step, specifically comprising the following steps:

[0026] 1) Add 200mg of silica nanoparticles with a diameter of 500±10nm into a 50mL glass bottle, then add 10mL of deionized water, and oscillate with ultrasonic waves for 30min to evenly obtain a colloidal silica solution;

[0027] 2) Take 1 mL of 1 mM silver nitrate prepared in advance with a pipette gun and add it to the above silica colloidal solution, place it on a shaker and mix for 24 hours;

[0028] 3) Spin the obtained above-mentioned silver nitrate silica mixed solution with a centrifuge at 3000r / min for 2min, centrifuge to obtain a precipitate, absorb the upper clear layer and wash it with deionized water, repeat three times;

[0029] 4) Add the silica nanoparticles adsorbing silver ions obtained above into 11 mL of deionized water, and add 0.5 mg of sodium borohydride solid;

[0030] 5) The above solution was transferred to a 2...

Embodiment 2

[0036] One-step synthesis of SiO embedded with Ag nanoparticles 2 The method for nanocapsules specifically comprises the following steps:

[0037] 1) Add 200mg of silica nanoparticles with a diameter of 500±10nm into a 50mL glass bottle, then add 10mL of deionized water, and oscillate with ultrasonic waves for 30min to evenly obtain a colloidal silica solution;

[0038] 2) Take 1 mL of 1 mM silver nitrate prepared in advance with a pipette gun and add it to the above silica colloidal solution, place it on a shaker and mix for 24 hours;

[0039] 3) Spin the obtained above-mentioned silver nitrate silica mixed solution with a centrifuge at 3000r / min for 2min, centrifuge to obtain a precipitate, absorb the upper clear layer and wash it with deionized water, repeat three times;

[0040] 4) Add the silica nanoparticles adsorbing silver ions obtained above into 11 mL of deionized water, and add 0.75 mg of sodium borohydride solid;

[0041] 5) The above solution was transferred to a ...

Embodiment 3

[0045] A method for synthesizing SiO nanocapsules inlaid with Ag nanoparticles in one step, specifically comprising the following steps:

[0046] 1) Add 200mg of silica nanoparticles with a diameter of 500±10nm into a 50mL glass bottle, then add 10mL of deionized water, and oscillate with ultrasonic waves for 30min to evenly obtain a colloidal silica solution;

[0047] 2) Take 1 mL of 1 mM silver nitrate prepared in advance with a pipette gun and add it to the above silica colloidal solution, place it on a shaker and mix for 24 hours;

[0048] 3) Spin the obtained above-mentioned silver nitrate silica mixed solution with a centrifuge at 3000r / min for 2min, centrifuge to obtain a precipitate, absorb the upper clear layer and wash it with deionized water, repeat three times;

[0049] 4) Add the silica nanoparticles adsorbing silver ions obtained above into 11 mL of deionized water, and add 0.75 mg of sodium borohydride solid;

[0050] 5) The above solution was transferred to a ...

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Abstract

The invention discloses a method for synthesizing an SiO2 nanocapsule inlaid with Ag nanoparticles at one step. The SiO2 nanocapsule inlaid with Ag nanoparticles is synthesized at one step, SiO2 is converted into a hollow nanocapsule structure composed of a nanosheet network under the action of NaBH4, and meanwhile, Ag+ is subjected to in-situ reduction. The structure achieves good antibacterial activity in an antibacterial experiment, and catechuic acid is compounded into the hollow nanostructure on the basis to obtain a double antibacterial mode with a better effect. The preparation method disclosed by the invention is mild in reaction condition, simple in preparation process and high in repeatability, the synthesized Ag nanoparticles are stable in dispersion, and the obtained hollow nanocapsule structure is large in specific surface area and high in porosity, has more channels facilitating loading and releasing drugs and can be widely used on the aspect of biomedical sciences.

Description

technical field [0001] The invention relates to a one-step method for synthesizing SiO2 nanocapsules inlaid with Ag nanoparticles and a preparation method thereof, belonging to the technical field of nanomaterials and composite materials. Background technique [0002] The antibacterial properties of silver nanoparticles have been widely used in antibacterial materials and medical materials in recent years. The broad-spectrum antibacterial properties of silver nanoparticles are used in various aspects of life, such as biomedicine, water purification, food preservation, cosmetics and even clothing. processing. In order to solve the shortcomings of silver nanoparticles being easily oxidized and agglomerated, compounding silver nanoparticles with polymers, supramolecular structures, ceramic materials and other inorganic porous materials can effectively prevent the oxidation and agglomeration of silver nanoparticles. However, in many current preparation methods of silver nanopar...

Claims

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Application Information

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IPC IPC(8): B01J13/14B01J13/20A01N59/16A01N43/16A01P1/00A01P3/00
CPCA01N43/16A01N59/16B01J13/14B01J13/203A01N2300/00
Inventor 吉庆敏汤琴
Owner NANJING UNIV OF SCI & TECH
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