Preparation method and application of sulfonic acid group modified super-paramagnetic nano material

A nanomaterial and superparamagnetic technology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve problems such as secondary pollution operations, high capital investment, and complexity, and achieve preparation The effect of low cost, low requirements for preparation conditions, and simple preparation process

Active Publication Date: 2016-03-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods have certain limitations, such as high capital investment, causing secondary pollution and complicated operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: The preparation method of this sulfonic acid group modified superparamagnetic nanomaterial is as follows:

[0015] (1) Add 0.006mol of FeCl 3 .6H 2 O, 0.049mol of sodium acetate and 0.005mol of sodium citrate were dissolved in 58ml of ethylene glycol, then stirred for 1h, added to the reactor and heated to 200°C for 10h; the obtained Fe 3 o 4 Nanoparticles were separated by magnetic separation and washed repeatedly with deionized water to obtain nano-Fe 3 o 4 particle;

[0016] (2) According to the ratio of adding 0.8g per 51mL, the step (1) nano-Fe 3 o 4 Particles are dispersed in an aqueous ethanol solution, which is prepared by mixing ethanol and water at a volume ratio of 50:1, ultrasonic treatment for 30 minutes, then adding 1.7ml of 25wt% ammonia solution, and adding 1ml of tetraethyl orthosilicate during stirring , kept stirring at 50°C for 6h, the obtained Fe 3 o 4 SiO 2 Nanoparticles were separated with a magnet, washed three times with ...

Embodiment 2

[0019] Embodiment 2: The preparation method of this sulfonic acid group modified superparamagnetic nanomaterial is as follows:

[0020] (1) Add 0.0061mol of FeCl 3 .6H 2 O, 0.05mol of sodium acetate and 0.0053mol of sodium citrate were dissolved in 59ml of ethylene glycol, then stirred for 1.5h, added to the reactor and heated to 195°C for 11h; the obtained Fe 3 o 4 Nanoparticles were separated by magnetic separation and washed repeatedly with deionized water to obtain nano-Fe 3 o 4 particle;

[0021] (2) According to the ratio of adding 0.85g per 65mL, the step (1) nano-Fe 3 o 4 Particles are dispersed in an aqueous ethanol solution, which is prepared by mixing ethanol and water at a volume ratio of 50:4, ultrasonic treatment for 40 minutes, and then adding 1.8ml of 25wt% ammonia solution, and adding 1.1ml of ethyl orthosilicate during the stirring process ester, and kept stirring at 55°C for 5h, the obtained Fe 3 o 4 SiO 2 Nanoparticles were separated with a magnet...

Embodiment 3

[0024] Embodiment 3: The preparation method of this sulfonic acid group modified superparamagnetic nanomaterial is as follows:

[0025] (1) Add 0.0062mol of FeCl 3 .6H 2O, 0.051mol of sodium acetate and 0.0056mol of sodium citrate were dissolved in 60ml of ethylene glycol, then stirred for 1.6h, added to the reactor and heated to 190°C for 12h; the obtained Fe 3 o 4 Nanoparticles were separated by magnetic separation and washed repeatedly with deionized water to obtain nano-Fe 3 o 4 particle;

[0026] (2) According to the ratio of 0.8g per 80mL, the step (1) nano-Fe 3 o 4 The particles are dispersed in an aqueous ethanol solution, which is prepared by mixing ethanol and water at a volume ratio of 50:5, ultrasonic treatment for 50 minutes, and then adding 1.9ml of 25wt% ammonia solution, and adding 1.1ml of ethyl orthosilicate during the stirring process ester, and kept stirring at 55°C for 5.5h, the obtained Fe 3 o 4 SiO 2 Nanoparticles were separated with a magnet, ...

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PUM

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Abstract

The invention discloses a preparation method of a sulfonic acid group modified super-paramagnetic nano material, and belongs to the field of material preparation and industrial wastewater treatment. The method comprises the following steps: preparing super-paramagnetic ferroferric oxide nanoparticles by using a coprecipitation method; by taking super-paramagnetic ferroferric oxide as a core, coating mono-dispersed spherical silicon dioxide nanoparticles on the surface of ferroferric oxide by using a stOber method; on the basis of coupling reaction principle, modifying on the core coated by silicon dioxide; and by taking 2-(4-sulfonyl chloride phenyl) ethyl trimethoxy silane as a modification reagent, modifying on a core-shell structure so as to connect the sulfonic acid group. The adsorbent is used for selectively adsorbing the heavy metal copper in sewage, is high in adsorption rate and can be repeatedly used.

Description

technical field [0001] The invention relates to a preparation method of a sulfonic acid group-modified superparamagnetic nanometer material and its application in treating heavy metals in sewage, belonging to the fields of material preparation and industrial waste water treatment. Background technique [0002] With the rapid development of modern society, the discharge of industrial pollution is becoming more and more serious, especially the discharge of heavy metals, such as zinc, mercury, copper, lead, nickel, etc., which pose a great threat to people's health. In the past, the treatment methods for heavy metals in sewage mainly included chemical precipitation, ion exchange, membrane filtration, electrochemical treatment, reverse osmosis, solvent extraction, and biological removal. However, these methods have certain limitations, such as high capital investment, causing secondary pollution, and complicated operations. Therefore, adsorption can be an alternative wastewater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28B01J20/06B01J20/30B01J20/28C02F101/20
CPCB01J20/06B01J20/22B01J20/28009B01J2220/46B01J2220/4806B01J2220/4812C02F1/288C02F2101/20
Inventor 汤立红包双友李凯宁平郭惠斌朱婷婷刘烨张贵剑韩伟明
Owner KUNMING UNIV OF SCI & TECH
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