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Preparation method and application of polydopamine-modified magnetic nanoparticle

A technology of magnetic nanoparticles and polydopamine, applied in chemical instruments and methods, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of high cost and complicated operation, achieve high stability and simple preparation process , the effect of mild reaction conditions

Pending Publication Date: 2019-08-20
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the treatment methods for heavy metals in water pollution proposed by domestic and foreign scholars include chemical precipitation method, redox method, ion exchange method, electrolysis method, biological method, etc., but these methods have high cost, complicated operation or need specific conditions, etc. shortcoming

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  • Preparation method and application of polydopamine-modified magnetic nanoparticle

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: a kind of preparation method of the magnetic nanoparticle of polydopamine modification, concrete steps are as follows:

[0026] (1) FeCl 3 ·6H 2 O, Na 3 C 6 h 5 o 7 2H 2 O and CH 3 COONa was added to the ethylene glycol solution and dissolved under ultrasonic conditions, and then reacted for 30min at a stirring rate of 750rpm to obtain a precursor solution; wherein FeCl 3 ·6H 2 O, Na 3 C 6 h 5 o 7 2H 2 O and CH 3 The mass ratio of COONa is 1.35:1.00:3.60;

[0027] (2) Place the precursor solution in step (1) at a temperature of 180°C for 10 hours to obtain nano-Fe 3 o 4 particles, cooled to room temperature, and nano-Fe collected by an external magnetic field 3 o 4 Particles were washed with ethanol and deionized water for more than 2 times;

[0028] (3) Concentrated hydrochloric acid is added to deionized water to prepare dilute hydrochloric acid solution, trishydroxymethylaminomethane is dissolved in deionized water to obtain Tris solu...

Embodiment 2

[0032] Embodiment 2: a kind of preparation method of the magnetic nanoparticle of polydopamine modification, concrete steps are as follows:

[0033] (1) FeCl 3 ·6H 2 O, Na 3 C 6 h 5 o 7 2H 2 O and CH 3 COONa was added to the ethylene glycol solution and dissolved under ultrasonic conditions, and then reacted at a stirring rate of 780rpm for 35min to obtain a precursor solution; wherein FeCl 3 ·6H 2 O, Na 3 C 6 h 5 o 7 2H 2 O and CH 3 The mass ratio of COONa is 1.35:1.00:3.60;

[0034] (2) Place the precursor solution in step (1) at a temperature of 190°C for 9 hours to obtain nano-Fe 3 o 4 particles, cooled to room temperature, and nano-Fe collected by an external magnetic field 3 o 4 Particles were washed with ethanol and deionized water for more than 2 times;

[0035] (3) Concentrated hydrochloric acid is added to deionized water to prepare dilute hydrochloric acid solution, trishydroxymethylaminomethane is dissolved in deionized water to obtain Tris solut...

Embodiment 3

[0039] Embodiment 3: a kind of preparation method of the magnetic nanoparticle of polydopamine modification, concrete steps are as follows:

[0040] (1) FeCl 3 ·6H 2 O, Na 3 C 6 h 5 o 7 2H 2 O and CH 3 COONa was added to the ethylene glycol solution and dissolved under ultrasonic conditions, and then reacted for 45min at a stirring rate of 800rpm to obtain a precursor solution; wherein FeCl 3 ·6H 2 O, Na 3 C 6 h 5 o 7 2H 2 O and CH 3 The mass ratio of COONa is 1.35:1.00:3.60;

[0041] (2) Place the precursor solution in step (1) at a temperature of 200°C for 8 hours to obtain nano-Fe 3 o 4 particles, cooled to room temperature, and nano-Fe collected by an external magnetic field 3 o 4 Particles were washed with ethanol and deionized water for more than 2 times;

[0042] (3) Concentrated hydrochloric acid is added to deionized water to prepare dilute hydrochloric acid solution, trishydroxymethylaminomethane is dissolved in deionized water to obtain Tris solut...

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Abstract

The invention discloses a preparation method and application of a polydopamine-modified magnetic nanoparticle, belonging to the technical field of magnetic nanoparticle modification. The preparation method comprises the following steps: preparing Fe3O4 nanoparticles from FeCl3.6H2O, Na3C6H5O7.2H2O and CH3COONa; adjusting the pH value of a Tris solution to 8.0-8.5 by using dilute hydrochloric acidso as to obtain a Tris-HCl buffer solution; adding the Fe3O4 nanoparticles into the Tris-HCl buffer solution for ultrasonic dispersion treatment for 5-10 min so as to obtain a solution A; adding dopamine hydrochloride into the Tris-HCl buffer solution for ultrasonic dispersion treatment for 1-2 min to obtain a solution B; adding the solution B into the solution A, performing a reaction for 10 to 24 h under stirring so as to obtain Fe3O4@PDA particles, collecting the nano-Fe3O4@PDA particles via an external magnetic field, separately washing the nano-Fe3O4@PDA particles with deionized water andethanol twice or more times, and carrying out drying under vacuum to obtain the polydopamine-modified magnetic nanoparticle. The polydopamine-modified magnetic nanoparticle, as a heavy metal adsorbent, has good biocompatibility, high stability, high adsorption capacity and superparamagnetism.

Description

technical field [0001] The invention relates to a preparation method and application of polydopamine-modified magnetic nanoparticles, belonging to the technical field of magnetic nanoparticles modification. Background technique [0002] With the rapid development of industrialization, various water pollution problems emerge one after another, and heavy metal ions have become the focus and difficulty of water treatment due to their toxicity and biorefractory properties. If heavy metal pollution is not dealt with in a timely and effective manner, it will endanger ecology and human health. Therefore, removing heavy metal ions in water is a problem that scientific researchers can't wait to solve. At present, the treatment methods for heavy metals in water pollution proposed by domestic and foreign scholars include chemical precipitation method, redox method, ion exchange method, electrolysis method, biological method, etc., but these methods have high cost, complicated operatio...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20
CPCB01J20/262C02F1/285C02F2101/20
Inventor 王世雄雷婷汤立红杨项军蒋芳李声剑王利莲任子旋
Owner YUNNAN UNIV
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