Modified nano particle as well as preparation method and application thereof

Abstract

The invention relates to the technical field of compounds, in particular to a modified nano particle as well as a preparation method and application thereof. The modified nano particle comprise an inorganic nano particle, and a poly-o-phenylenediamine layer coating the surface of the inorganic nano particle. The applicant creatively discovers that the modified nano particle can catalyze the reaction of oxygen and water under a neutral condition (pH value is 7.0) to generate hydrogen peroxide; and a substrate TMB (3, 3 ', 5, 5'-tetramethyl benzidine) can be oxidized, so that an obvious absorption peak is generated at the 658 nm position of the ultraviolet-visible spectrum, and the unique oxidation-reduction type nano-enzyme catalytic activity is provided;.

Description

technical field

[0001] The invention relates to the technical field of compounds, in particular to a modified nanoparticle, its preparation method and application. Background technique

[0002] Aromatic polymers are the most commonly used semiconducting polymers. Their conjugated structures provide excellent electrical conductivity and electrochemical activity, and their electrical conductivity and dielectric properties can be tuned by controlling the proton doping state. Coupling plasmonics with active dielectrics holds promise for the development and design of multifunctional responsive smart materials, such as terahertz phase-modulated metamaterials. The surface of aromatic polymers (such as poly-o-phenylenediamine) is rich in amino and imine groups, making it easy to functionalize and modify, expanding its application range, such as in biosensing, metal ion adsorption, supercapacitors , Catalysis, sensing, electrochromic devices and many other fields.

[0003] For poly...

Examples

preparation example Construction

[0045] The present invention also provides a method for preparing the above-mentioned modified nanoparticles, comprising the following steps:

[0046] A) mixing the inorganic nanoparticle dispersion, the aqueous solution of the surfactant, the aqueous solution of o-phenylenediamine and the hydrogen peroxide solution to obtain a mixed solution;

[0047] B) After adjusting the pH value of the mixed solution to 4-6, react at 35-45° C. to obtain modified nanoparticles.

[0048] In the invention, the inorganic nano particle dispersion liquid, the aqueous solution of the surfactant, the aqueous solution of o-phenylenediamine and the hydrogen peroxide solution are mixed uniformly to obtain the mixed liquid.

[0049] The components of the inorganic nanoparticles are the same as above, and will not be repeated here.

[0050] The present invention has no special limitation on the preparation method of the inorganic nanoparticles, which can be commercially available or self-made.

[00...

Embodiment 1

[0078] 1. Synthesis of Prussian blue nanoparticles:

[0079] Prepare 20mL ferric chloride aqueous solution (1.0mmol / L) and 20mL potassium ferricyanide aqueous solution (1.0mmol / L) in advance. The potassium ferricyanide aqueous solution was placed in an ice-water bath for 30 minutes, then 1 mmol of citric acid was added, and shaken for 5 minutes to make it evenly mixed. Prepare a 100ml round-bottom flask and a magnet, pour the above ferric chloride aqueous solution into the flask, and transfer it to a 60°C oil bath for 10 minutes to stabilize. The above potassium ferricyanide solution was added dropwise into the round bottom flask under vigorous stirring, and the solution gradually turned bright blue. Stirring was stopped after 20 min, and 40 mL of acetone was added after the solution was cooled to room temperature, and then centrifuged at 12,000 rpm for 15 min to obtain a blue product, which was washed several times with acetone to obtain Prussian blue nanoparticles. Finally...

Embodiment 2

[0086] 1. Synthesis of Fe3O4 nanoparticles:

[0087] Dissolve 0.811g of ferric chloride in 40mL of ethylene glycol, shake for 30min to form a clear solution, then add 3.6g of sodium acetate and 2.0g of polyethylene glycol (PEG), stir the mixture magnetically for 30min, then put it into a 50mL autoclave , the autoclave was moved into a blast oven at 190° C. for 9 h. Then the reactant was cooled, centrifuged at 12000 rpm for 10 min, the product was alternately washed six times with ethanol and water, and dried in a vacuum oven at 60° C. for 6 h to obtain ferric oxide nanoparticles. Finally, the obtained Fe3O4 nanoparticles were dispersed in 10 mL of deionized water for storage.

[0088] 2. Take 0.2mL ferric oxide nanoparticle dispersion (concentration is 15mmol / L, particle diameter of ferric oxide nanoparticle is 300-500nm), add 3mL sodium lauryl sulfate aqueous solution (concentration is 10mmol / L ), the molar ratio of iron ferric oxide nanoparticles to sodium lauryl sulfate i...

technical field

[0001] The invention relates to the technical field of compounds, in particular to a modified nanoparticle, its preparation method and application. Background technique

[0002] Aromatic polymers are the most commonly used semiconducting polymers. Their conjugated structures provide excellent electrical conductivity and electrochemical activity, and their electrical conductivity and dielectric properties can be tuned by controlling the proton doping state. Coupling plasmonics with active dielectrics holds promise for the development and design of multifunctional responsive smart materials, such as terahertz phase-modulated metamaterials. The surface of aromatic polymers (such as poly-o-phenylenediamine) is rich in amino and imine groups, making it easy to functionalize and modify, expanding its application range, such as in biosensing, metal ion adsorption, supercapacitors , Catalysis, sensing, electrochromic devices and many other fields.

[0003] For poly...

Examples

preparation example Construction

[0045] The present invention also provides a method for preparing the above-mentioned modified nanoparticles, comprising the following steps:

[0046] A) mixing the inorganic nanoparticle dispersion, the aqueous solution of the surfactant, the aqueous solution of o-phenylenediamine and the hydrogen peroxide solution to obtain a mixed solution;

[0047] B) After adjusting the pH value of the mixed solution to 4-6, react at 35-45° C. to obtain modified nanoparticles.

[0048] In the invention, the inorganic nano particle dispersion liquid, the aqueous solution of the surfactant, the aqueous solution of o-phenylenediamine and the hydrogen peroxide solution are mixed uniformly to obtain the mixed liquid.

[0049] The components of the inorganic nanoparticles are the same as above, and will not be repeated here.

[0050] The present invention has no special limitation on the preparation method of the inorganic nanoparticles, which can be commercially available or self-made.

[00...

Embodiment 1

[0078] 1. Synthesis of Prussian blue nanoparticles:

[0079] Prepare 20mL ferric chloride aqueous solution (1.0mmol / L) and 20mL potassium ferricyanide aqueous solution (1.0mmol / L) in advance. The potassium ferricyanide aqueous solution was placed in an ice-water bath for 30 minutes, then 1 mmol of citric acid was added, and shaken for 5 minutes to make it evenly mixed. Prepare a 100ml round-bottom flask and a magnet, pour the above ferric chloride aqueous solution into the flask, and transfer it to a 60°C oil bath for 10 minutes to stabilize. The above potassium ferricyanide solution was added dropwise into the round bottom flask under vigorous stirring, and the solution gradually turned bright blue. Stirring was stopped after 20 min, and 40 mL of acetone was added after the solution was cooled to room temperature, and then centrifuged at 12,000 rpm for 15 min to obtain a blue product, which was washed several times with acetone to obtain Prussian blue nanoparticles. Finally...

Embodiment 2

[0086] 1. Synthesis of Fe3O4 nanoparticles:

[0087] Dissolve 0.811g of ferric chloride in 40mL of ethylene glycol, shake for 30min to form a clear solution, then add 3.6g of sodium acetate and 2.0g of polyethylene glycol (PEG), stir the mixture magnetically for 30min, then put it into a 50mL autoclave , the autoclave was moved into a blast oven at 190° C. for 9 h. Then the reactant was cooled, centrifuged at 12000 rpm for 10 min, the product was alternately washed six times with ethanol and water, and dried in a vacuum oven at 60° C. for 6 h to obtain ferric oxide nanoparticles. Finally, the obtained Fe3O4 nanoparticles were dispersed in 10 mL of deionized water for storage.

[0088] 2. Take 0.2mL ferric oxide nanoparticle dispersion (concentration is 15mmol / L, particle diameter of ferric oxide nanoparticle is 300-500nm), add 3mL sodium lauryl sulfate aqueous solution (concentration is 10mmol / L ), the molar ratio of iron ferric oxide nanoparticles to sodium lauryl sulfate i...

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