Manganese bioxide/carbon nano tube composite adsorbent and its preparing method

A carbon nanotube composite, manganese dioxide technology, applied in chemical instruments and methods, other chemical processes and other directions, can solve problems such as unsatisfactory adsorption of organic matter, and achieve improved ability to remove organic matter, strong adsorption capacity, large ratio The effect of surface area

Inactive Publication Date: 2007-03-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most studies on carbon nanotubes and their related composite materials focus on the removal of heavy metal ions, while the adsorption of organic matter is not satisfactory.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The preparation method of manganese dioxide / carbon nanotube composite adsorbent is:

[0012] (1) Pretreatment of carbon nanotubes. The carbon nanotubes were successively put into concentrated nitric acid and hydrofluoric acid and soaked for 6 hours to dissolve the catalyst particles and catalyst carrier in the tube, after washing and filtering, the carbon nanotubes were immersed in the mixed solution of nitric acid and sulfuric acid (nitric acid and sulfuric acid The volume ratio is 5:3) and boiled for 1 h to remove the amorphous carbon particles, then filter the carbon nanotubes with a nuclear pore membrane (pore size 2-4 μm), and wash repeatedly until the pH value of the carbon nanotube aqueous solution reaches 7.

[0013] (2) MnO 2 load. Add 4 g of pretreated carbon nanotubes to 1 L of water, and stir with high intensity. Add 1.4g (CH 3 COO) 2 Mn, followed by 50mL KMnO 4 (0.13mol / L) solution, keep stirring during the whole process, until the solution color turn...

Embodiment 2

[0015] The preparation method of manganese dioxide / carbon nanotube composite adsorbent is:

[0016] (1) Pretreatment of carbon nanotubes. Put the carbon nanotubes into concentrated nitric acid and hydrofluoric acid and soak them for 12 hours respectively to dissolve the catalyst particles and the catalyst carrier in the carbon nanotubes. After washing and filtering, put the carbon nanotubes into the mixed solution of nitric acid and sulfuric acid (volume (ratio 5:3) for 0.5 h to remove amorphous carbon particles, then filter the carbon nanotubes with a nuclear pore membrane (pore size 2-4 μm), and wash repeatedly until the pH value of the carbon nanotube aqueous solution reaches 7.

[0017] (2) MnO 2 load. Add 4 g of pretreated carbon nanotubes to 1 L of water, and stir with high intensity. Add 0.7g (CH 3 COO) 2 Mn, followed by 25 mL KMnO 4 (0.13mol / L) solution, keep stirring during the whole process, until the solution color turns brown-black, it shows that MnO 2 gener...

Embodiment 3

[0019] The preparation method of manganese dioxide / carbon nanotube composite adsorbent is:

[0020] (1) Pretreatment of carbon nanotubes. Put the carbon nanotubes into concentrated nitric acid and hydrofluoric acid and soak them for 24 hours respectively to dissolve the catalyst particles and the catalyst carrier in the tube. After washing and filtering, put the carbon nanotubes into the mixed solution of nitric acid and sulfuric acid (volume ratio 5 : 3) and boiled for 2 hours to remove the amorphous carbon particles, then filter the carbon nanotubes with a nuclear pore membrane (pore size 2-4 μm), and wash repeatedly until the pH value of the carbon nanotube aqueous solution reaches 7.

[0021] (2)MnO 2 load. Add 4 g of pretreated carbon nanotubes to 1 L of water, and stir with high intensity. Add 2.8g (CH 3 COO) 2 Mn, followed by 75 mL KMnO 4 (0.13mol / L) solution, keep stirring during the whole process, until the solution color turns brownish black, it shows that MnO2...

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Abstract

The present invention provides a manganese dioxide / carbon nano tube composite adsorbing agent. Said adsorbing agent includes manganese dioxide and carbon nano tube, the manganese dioxide can be adsorbed on the carbon nano tube, the manganese dioxide content is 10%-40% of total mass. Besides, said invention also provides its preparation method and its concrete steps.

Description

technical field [0001] The invention relates to an adsorbent and a preparation method thereof, belonging to the field of adsorbents for water treatment. Background technique [0002] As a new member of the carbon family, carbon nanotubes have been extensively studied in terms of properties and applications, such as reinforcing matrix for composite materials, field emitters, hydrogen storage materials, microelectronic components and catalyst supports. [0003] In recent years, carbon nanotubes and their related composite materials as supports have also been intensively studied as adsorbents in the field of water treatment. However, most studies on carbon nanotubes and their related composite materials focus on the removal of heavy metal ions, while the adsorption of organic matter is not satisfactory. Hydrated manganese dioxide has a large specific surface area and abundant surface hydroxyl groups, so it exhibits excellent adsorption properties for many pollutants, especiall...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/30
Inventor 王曙光聂玮姚雅伟巩文信刘贤伟栾兆坤张栋华
Owner SHANDONG UNIV
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