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Polypyrrole/titanium dioxide composite adsorbent, its preparation, application and regeneration methods

A technology of titanium dioxide and composite adsorption, which is applied in the direction of chemical instruments and methods, separation methods, filter regeneration, etc., to achieve the effects of easy regeneration, easy availability of raw materials, and excellent adsorption performance

Active Publication Date: 2012-02-15
浙江宏铭环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Titanium dioxide composites modified by polymers have more excellent properties, but titanium dioxide composites modified by conductive polymers as dye adsorbents have not been reported in the literature

Method used

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  • Polypyrrole/titanium dioxide composite adsorbent, its preparation, application and regeneration methods
  • Polypyrrole/titanium dioxide composite adsorbent, its preparation, application and regeneration methods
  • Polypyrrole/titanium dioxide composite adsorbent, its preparation, application and regeneration methods

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Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0039] preparation:

[0040](1) Take 20 mL of butyl titanate and 20 mL of n-propanol to prepare the alcohol solution of butyl titanate; under vigorous stirring, slowly add the alcohol solution of butyl titanate until the pH is 1 and the temperature is Hydrolyze in 400 mL of nitric acid solution at 100°C and stir for 5 hours to obtain a transparent titanium dioxide sol.

[0041] (2) Add 0.10 mL of pyrrole monomer to the obtained sol at -20~10 °C, mix and stir for 0.5 h, then add 20 mL, 1 mol L -1 The ferric chloride solution was used as an oxidant to realize oxidative polymerization. After the dropwise addition, it was left to stand at this temperature for more than 20 h. After filtering and drying, a black product was obtained, which was the polypyrrole composite nano-titanium dioxide adsorption material.

[0042] application:

[0043] (3) The prepared adsorbent was used to remove the anionic dye acid red G in the solution. Add an initial concentration of 500 mg L to a dark...

specific Embodiment 2

[0046] preparation:

[0047] (1) Take 10 mL of butyl titanate and 10 mL of isopropanol to prepare an alcohol solution of butyl titanate; under vigorous stirring, slowly add the alcohol solution of butyl titanate until the pH is 2 and the temperature is Hydrolyze in 100 mL of nitric acid solution at 80°C and stir for 5 hours to obtain a transparent titanium dioxide sol.

[0048] (2) Add 5.0 mL of pyrrole monomer to the obtained sol at 10-25 °C, mix and stir for 0.5 h, then add 10 mL, 1 mol L -1 The ferric chloride solution was used as an oxidant to realize oxidative polymerization. After the dropwise addition, it was left to stand at this temperature for more than 20 h. After filtering and drying, a black product was obtained, which was the polypyrrole composite nano-titanium dioxide adsorption material.

[0049] application:

[0050] (3) The prepared adsorbent was used to remove acid red G in the solution. Add an initial concentration of 500 mg L to a darkened brown bottle...

specific Embodiment 3

[0053] preparation:

[0054] (1) Take 10 mL of butyl titanate and 20 mL of absolute ethanol to prepare an alcohol solution of butyl titanate; under vigorous stirring, slowly add the alcohol solution of butyl titanate until the pH is 2 and the temperature is Hydrolyze in 100 mL of nitric acid solution at 25 °C and stir for 5 hours to obtain a transparent titanium dioxide sol.

[0055] (2) Add 30 mL of pyrrole monomer to the obtained sol at 50-75 °C, mix and stir for 0.5 h, then add 150 mL, 1 mol L -1 The ammonium persulfate solution was used as an oxidant to realize oxidative polymerization. After the dropwise addition, the reaction was continued at this temperature for more than 20 h. After filtration and drying, a black product was obtained, which was the polypyrrole composite nano-titanium dioxide adsorption material.

[0056] application:

[0057] (3) The prepared adsorbent is used to remove methylene blue in the solution. Add an initial concentration of 500 mg L to a ...

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Abstract

The invention relates to an adsorbent for adsorbing dye in water, and its preparation, application and regeneration methods. The adsorbent provided by the invention is prepared by in situ composition of polypyrrole and titanium dioxide. The mass ratio of titanium dioxide to polypyrrole in the composite adsorbent is 1: 0.05-50. The preparation method comprises the following steps of: using an organic or inorganic titanium source as a raw material, and adopting a sol-gel method at the temperature of 0-100 DEG C to prepare a titanium dioxide sol; Mixing the obtained titanium dioxide sol with a pyrrole monomer at the temperature of minus 20-80 DEG C, realizing in situ composite by the chemical oxidation process, filtering and drying to obtain the polypyrrole nanometer titanium dioxide composite adsorbent. By the adoption of the adsorbent, dye in high-density dye wastewater can be effectively adsorbed. The preparation method is simple, and has short process and mild reaction condition; theaddition quantity of the prepared adsorbent during the dye wastewater treatment process is little; the adsorption balance time is short; the adsorbent can be repeatedly regenerated and used for a long time; and the regenerated adsorbent still has high adsorption performance.

Description

technical field [0001] The present invention relates to an adsorbent and its preparation method, in particular to a polypyrrole / titanium dioxide composite adsorbent and its preparation method. The invention also relates to the application of the adsorbent in treating dye wastewater by using the principle of adsorption and the regeneration method of the adsorbent . Background technique [0002] Every year, a large amount of dye wastewater from printing and dyeing, papermaking, plastics, leather, food and mineral processing industries is discharged into water bodies. Due to the characteristics of high concentration, dark color and complex composition of this type of wastewater, it not only causes Visual pollution can also interfere with the biological processes in the water body, so it will cause serious water pollution problems. Therefore, the removal of dyes from water bodies is of great environmental and technological importance. [0003] At present, the commonly used dye...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/20B01J20/34C02F1/28
Inventor 延卫李晶晶冯江涛
Owner 浙江宏铭环保有限公司
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