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Preparation method and application of a halloysite nanotube/polypyrrole composite adsorbent

A technology of halloysite nanotubes and composite adsorption, which is applied to chemical instruments and methods, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. Solve the problems of practical application in the field and low adsorption capacity, and achieve the effects of uniform size, easy regeneration, and high adsorption capacity

Active Publication Date: 2019-10-18
四川科尔瑞环保科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pure halloysite nanotube powder has small particles and is difficult to separate from the solution. In addition, its adsorption capacity is relatively low, which limits its practical application in the field of water treatment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This example relates to a method for preparing a halloysite nanotube / polypyrrole composite adsorbent, comprising the following steps: Step 1, adding 1 part of halloysite nanotube and 1 part of γ-aminopropyltriethyl to a three-necked flask Oxysilane and 70mL 95% ethanol were dispersed by ultrasonic wave for 30min, then placed at 40°C-80°C for 3-8h, stirred and reacted for 3-8h, then suction filtered, washed, and the product was vacuum-dried to obtain γ-aminopropyltriethoxysilane Modified halloysite nanotubes;

[0029] Step 2, disperse the halloysite nanotubes modified by γ-aminopropyltriethoxysilane in 80 mL of 0.8 mol / L hydrochloric acid solution, add 0.5 parts of polyvinylpyrrolidone, and ultrasonically disperse for 20 minutes to obtain uniformly dispersed mixed system;

[0030] Step 3, put the mixed system in an ice bath, add 10 parts of ethanol solution of pyrrole monomer (containing 1 part of pyrrole monomer, 9 parts of ethanol), stir for 10-30 minutes, and slowly ...

Embodiment 2

[0032] This embodiment relates to a preparation method of halloysite nanotube / polypyrrole composite adsorbent, comprising the following steps:

[0033] Step 1: Add 1 part of halloysite nanotubes, 1.2 parts of γ-aminopropyltriethoxysilane and 80 mL of 95% ethanol into a three-necked flask, disperse with ultrasonic wave for 30 minutes, and place it at 40°C-80°C to stir and react 5 ~8h, after suction filtration, washing, the product is vacuum-dried to obtain halloysite nanotubes modified by γ-aminopropyltriethoxysilane;

[0034] Step 2, disperse the halloysite nanotubes modified by γ-aminopropyltriethoxysilane in 90mL of 1.2mol / L hydrochloric acid solution, add 0.3 parts of polyvinylpyrrolidone, and ultrasonically disperse for 20min to obtain uniformly dispersed mixed system,

[0035] Step 3, put the mixed system in an ice bath, add 15 parts of ethanol solution of pyrrole monomer (containing 1.5 parts of pyrrole monomer, 13.5 parts of ethanol), stir for 10-30 minutes, and slowly...

Embodiment 3

[0037] This embodiment relates to a preparation method of halloysite nanotube / polypyrrole composite adsorbent, comprising the following steps:

[0038] Step 1, add 1 part of halloysite nanotubes, 2 parts of γ-aminopropyltriethoxysilane and 90mL of 95% ethanol into a three-necked flask, disperse with ultrasonic wave for 30min, then place it at 40°C-80°C for 3~ 6h, after suction filtration, washing, the product is vacuum-dried to obtain halloysite nanotubes modified by γ-aminopropyltriethoxysilane;

[0039] Step 2, disperse the halloysite nanotubes modified by γ-aminopropyltriethoxysilane in 90mL of 1.5mol / L hydrochloric acid solution, add 1 part of polyvinylpyrrolidone, and ultrasonically disperse for 30min to obtain evenly dispersed mixed system,

[0040] Step 3, put the mixed system in an ice bath, add 20 parts of ethanol solution of pyrrole monomer (containing 2 parts of pyrrole monomer and 18 parts of ethanol), stir for 10-30 minutes, and slowly drop the mixture when the t...

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Abstract

The invention provides a preparation method and an application of a halloysite nanotube / polypyrrole composite adsorbent. The method comprises the following steps: adding ethanol, halloysite nanotubesand gamma-aminopropyltriethoxysilane into a three-mouth flask, carrying out stirring for reaction, and carrying out suction filtration, washing and vacuum drying to obtain gamma-aminopropyltriethoxysilane modified halloysite nanotubes; then dispersing the gamma-aminopropyltriethoxysilane modified halloysite nanotubes in a hydrochloric acid solution, adding polyvinylpyrrolidone, and carrying out ultrasonic dispersion to obtain a uniformly dispersed mixed system; and dropwise adding an ethanol solution of pyrrole monomers, carrying out ice bath after stirring, dropwise adding a ferric trichloride solution slowly after the temperature is reduced to 5 DEG C or below, carrying out stirring for reaction so that the solution gradually turns to black, carrying out suction filtration to obtain black powder, carrying out washing with ethanol and distilled water, and carrying out vacuum drying to obtain the halloysite nanotube / polypyrrole composite adsorbent. The halloysite nanotube / polypyrrole composite adsorbent provided by the invention has the advantages of good stability, easy recovery and simple and convenient activation treatment, can be repeatedly used, and has a promotion and application value.

Description

technical field [0001] The invention belongs to the technical field of water pollution purification, and in particular relates to a preparation method and application of a halloysite nanotube / polypyrrole composite adsorbent. Background technique [0002] Halloysite nanotubes are a kind of natural clay-like silicate minerals, which have the characteristics of non-toxicity, good stability, and large specific surface area. As adsorbents, halloysite nanotubes have attracted widespread attention in sewage treatment. However, the fine particles of halloysite nanotube powder are difficult to separate from the solution, and its adsorption capacity is relatively low, which limits its practical application in the field of water treatment. [0003] Polypyrrole is a conductive polymer material, which has been widely studied due to its many excellent properties, such as non-toxicity, easy recycling, excellent environmental stability, and easy preparation. There are also positively charg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/34C02F101/38
Inventor 张梦萌何妍钱勇
Owner 四川科尔瑞环保科技有限责任公司