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A preparation method of zero-valent iron-carbon nanotube modified zeolite composite material

A carbon nanotube modification and composite material technology is applied in the field of preparation of zero-valent iron-carbon nanotube modified zeolite composite materials, which can solve the problems of many sources of waste water, environmental hazards, large discharge and the like, and achieves a simple preparation process. , the effect of improving efficiency and flexibility

Active Publication Date: 2019-10-01
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Wastewater rich in high-concentration organic matter has many sources and a large amount of discharge. Untreated or incompletely treated wastewater will cause great harm to the environment.

Method used

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  • A preparation method of zero-valent iron-carbon nanotube modified zeolite composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Disperse 20 g of artificial zeolite 5A in 300 mL of 10 mol / L NaOH solution, and stir at 110° C. for 7 hours to form a hydrogel. Then add 2g of zero-valent iron / carbon nanotubes (mass ratio 1.5:1), stir evenly, put the material into a polytetrafluoroethylene-lined reactor, and crystallize at 99°C for 3-4 hours. Then filter, wash, and dry at 60°C for 24 hours.

Embodiment 2

[0027] 13X zeolite is mixed with sodium hydroxide solution, wherein, the concentration of sodium hydroxide solution is 10mol / L, and the volume-to-weight ratio (mL solution / g zeolite) of sodium hydroxide solution and zeolite is 5:1, after fully mixing, in 100 The hydrogel was prepared by reacting at ℃ for 24 hours; the hydrogel was mixed with 2g of zero-valent iron / carbon nanotubes (mass ratio 1.5:1), crystallized at 105℃ and autogenous pressure for 24 hours, and then separated , washing and drying steps to obtain the sample.

Embodiment 3

[0029] P zeolite is mixed with potassium hydroxide solution, wherein, the concentration of potassium hydroxide solution is 5mol / L, and the volume-to-weight ratio (mL solution / g zeolite) of sodium hydroxide solution and zeolite is 10:1, after fully mixing, in 100 The hydrogel was prepared by reacting at ℃ for 3 hours; the hydrogel was mixed with 2g of zero-valent iron / carbon nanotubes (mass ratio 1.5:1), crystallized at 110℃ and autogenous pressure for 24 hours, and then separated , washing and drying steps to obtain the sample.

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Abstract

The invention relates to a method for preparing zero-valent iron-carbon nanotube modified zeolite composite materials. The method specifically includes the following steps: (1) Add zeolite or zeolite precursor to an alkali solution, mix thoroughly, and prepare water. gel; (2) Add zero-valent iron and carbon nanotubes to the hydrogel and mix evenly to prepare a mixed gel; (3) Crystallize the mixed gel, and after the crystallization is completed, separate , washing and drying to obtain the zero-valent iron-carbon nanotube modified zeolite composite material. Compared with the existing technology, the present invention uses zeolite or silicon source or aluminum source to synthesize the zeolite precursor. Under alkaline conditions, the zeolite is modified by zero-valent iron and carbon nanotubes, which greatly improves the degradation of organic pollution by the composite material. The efficiency of the material, the preparation process is simple, the flexibility is high, the silicon-aluminum ratio has a large adjustable range, and it has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a preparation method of a zero-valent iron-carbon nanotube modified zeolite composite material. Background technique [0002] With the rapid development of agriculture and industry, a large amount of waste water has caused great harm to the natural environment and human body. Agricultural and industrial wastewater is rich in organic pollutants such as antibiotics, humic acids, etc. High concentrations of organic pollutants lead to environmental damage. Animal husbandry, urban and agricultural wastewater, industrial wastewater will increase the concentration of organic matter in the water environment. Wastewater rich in high concentrations of organic matter has many sources and a large amount of discharge. Untreated or incompletely treated wastewater will cause great harm to the environment. Therefore, the treatment of high-concentration organic pollutants has attract...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/072B01J29/14B01J29/76B01J29/82B01J35/10C02F1/30C02F101/38
CPCC02F1/30B01J29/072B01J29/143B01J29/7607B01J29/82C02F2101/40C02F2305/10B01J2229/18B01J35/39B01J35/60
Inventor 刘敏敏于水利
Owner TONGJI UNIV
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