Preparation method of 2-mercaptopyridine modified magnetic carbon nanotube porous adsorbent

A technology of magnetic carbon nanotubes and porous adsorbents, which is applied in the fields of environment and chemistry, can solve the problems of difficult solid-liquid separation of adsorbents and hinder the progress of adsorption technology, and achieve good physical and chemical stability, excellent mechanical strength, and good desorption performance Effect

Inactive Publication Date: 2017-05-31
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at the same time, there are also many shortcomings in the adsorption method. Among them, the difficulty of solid-liquid separation of adsorbents has always been a major problem hinder

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of oxidized carbon nanotubes: In the reactor, add potassium permanganate: 13g, deionized water: 63 mL, stir to dissolve, add sulfuric acid: 8 mL, mix well, then add carbon nanotubes: 10g, room temperature Soak for 5 hours, boil for 15 minutes, wash with deionized water until neutral after cooling, separate solid and liquid, and dry to obtain carbon dioxide nanotubes;

[0024] (2) Preparation of magnetic carbon nanotube porous material: In a polytetrafluoroethylene reactor, add deionized water: 60 mL, nano-Fe 3 o 4 Magnetic particles: 6g, glyceryl stearate: 1.0g, γ-glycidyl etheroxypropyl trimethoxysilane: 10g, add carbon dioxide nanotubes: 10g, ultrasonically disperse into a suspension, ethylenediaminetetramethylene Sodium phosphonate: 2g, polyvinylpyrrolidone: 9g, stir and mix well, seal the reactor, raise the temperature to 200°C, react for 4 hours, cool to room temperature, soak the product in deionized water for 72 hours, freeze at -18°C for 6 hours...

Embodiment 2

[0028] (1) Preparation of oxidized carbon nanotubes: In the reactor, add potassium permanganate: 10g, deionized water: 66 mL, stir to dissolve, add sulfuric acid: 9 mL, mix well, then add carbon nanotubes: 8g, at room temperature Soak for 5 hours, boil for 15 minutes, wash with deionized water until neutral after cooling, separate solid and liquid, and dry to obtain carbon dioxide nanotubes;

[0029] (2) Preparation of magnetic carbon nanotube porous material: In a polytetrafluoroethylene reactor, add deionized water: 66 mL, nano-Fe 3 o 4 Magnetic particles: 4g, glyceryl stearate: 0.5g, γ-glycidyl etheroxypropyl trimethoxysilane: 13g, adding carbon dioxide nanotubes: 8g, ultrasonically dispersed into a suspension, ethylenediaminetetramethylene Sodium phosphonate: 1g, polyvinylpyrrolidone: 8g, stir and mix well, seal the reactor, raise the temperature to 200°C, react for 4 hours, cool to room temperature, soak the product in deionized water for 72 hours, freeze at -18°C for 6 ...

Embodiment 3

[0033] (1) Preparation of oxidized carbon nanotubes: In the reactor, add potassium permanganate: 16g, deionized water: 60 mL, stir to dissolve, add sulfuric acid: 8.5 mL, mix well, then add carbon nanotubes: 9g, room temperature Soak for 5 hours, boil for 15 minutes, wash with deionized water until neutral after cooling, separate solid and liquid, and dry to obtain carbon dioxide nanotubes;

[0034] (2) Preparation of magnetic carbon nanotube porous material: In a polytetrafluoroethylene reactor, add deionized water: 58 mL, nano-Fe 3 o 4 Magnetic particles: 7g, glyceryl stearate: 2.0g, γ-glycidyl etheroxypropyl trimethoxysilane: 8g, adding carbon dioxide nanotubes: 12g, ultrasonically dispersed into a suspension, ethylenediaminetetramethylene Sodium phosphonate: 3g, polyvinylpyrrolidone: 10g, stir and mix well, seal the reactor, raise the temperature to 200°C, react for 4 hours, cool to room temperature, soak the product in deionized water for 72 hours, freeze at -18°C for 6 ...

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Abstract

The invention discloses a preparation method of a 2-mercaptopyridine modified magnetic carbon nanotube porous adsorbent. The preparation method is characterized by comprising the following steps of firstly, oxidizing a carbon nanotube; magnetizing, so as to obtain a magnetic carbon nanotube porous material; aminating the magnetic carbon nanotube porous material, so as to obtain the aminated magnetic carbon nanotube porous material; adding 78 to 85% of tetrahydrofuran, 1 to 4% of 2-mercaptopyridine and 8 to 16% of aminated magnetic carbon nanotube porous material into a reactor in percentage by mass, stirring, dripping 1.5 to 5.5% of fumaryl chloride, stirring at constant temperature of 85+/-2 DEG C, stirring, and refluxing to react for 5h; cooling, washing by deionized water to neutral state, separating solid and liquid, and drying, so as to obtain the 2-mercaptopyridine modified magnetic carbon nanotube porous adsorbent. The 2-mercaptopyridine modified magnetic carbon nanotube porous adsorbent has the advantages that the adsorbing capacity on silver is high, the selective adsorbing capacity on silver is high, the cost is low, the mechanical strength is low, the adsorbent can be repeatedly used for not less than 10 times, and the separation is easy.

Description

technical field [0001] The invention relates to a preparation method of a modified magnetic adsorbent, in particular to a preparation method of a 2-mercaptopyrimidine modified magnetic carbon nanotube porous adsorbent and an application technology for silver adsorption, belonging to the technical field of environment and chemistry. Background technique [0002] Due to the needs of industrial development and life, many heavy metals are discharged into the atmosphere and water, endangering the ecological environment and human health. The wide application of silver and silver-containing products in the fields of electronic electroplating, photosensitive materials, chemical industry and scientific research has produced a large amount of Silver-containing waste liquid not only causes serious environmental pollution, but also causes a large waste of silver resources. Therefore, the removal and recovery of silver in waste liquid containing silver ions has very important research an...

Claims

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Application Information

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IPC IPC(8): B01J20/28B01J20/20B01J20/30C02F1/28C02F101/20
CPCB01J20/205B01J20/28009C02F1/288C02F2101/20C02F2303/16
Inventor 李慧芝翟玉博
Owner UNIV OF JINAN
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