Preparation method of activated carbon loaded nano zero-valent iron composite material

Abstract

The invention discloses a preparation method of an activated carbon loaded nano zero-valent iron composite material. The preparation method comprises the following steps that 1, an activated carbon electrode slice is prepared by adopting a diaphragm roller pressing method; 2, an electrodeposition liquid is prepared; 3, the electrodeposition liquid obtained in the step 2 is placed in a constant-temperature water bath state, the activated carbon electrode slice in the step 1 is taken as a cathode, a pure iron sheet serves as an anode, a direct current with constant current density is additionally used for carrying out electrodeposition reaction, and nitrogen is continuously fed in the process; and 4, after electrodeposition is completed, the activated carbon electrode slice is taken out, ultrapure water is used for washing, then ultrasonic oscillation is carried out, the ultrapure water and ethanol are adopted for alternate washing, and the activated carbon loaded nano zero-valent iron composite material is obtained after vacuum drying. According to the activated carbon loaded nano composite material which is prepared based on the electrodeposition method, the equipment is simple, operation is convenient, the reaction temperature is low, the time is short, the cost is low, and the prepared activated carbon loaded nano composite material is good in dispersibility, large in specific surface area and controllable in load amount.

Description

technical field

[0001] The invention relates to the field of material preparation, in particular to a preparation method of activated carbon-supported nano zero-valent iron composite material. Background technique

[0002] With the rapid development of our country's society and economy, the problem of environmental pollution is becoming more and more prominent, and its negative impact is also becoming more and more significant. Therefore, it is more and more urgent to strengthen the research and development of environmental pollution control materials.

[0003] Nano zero-valent iron is a new and efficient environmental remediation technology. Because of its small particles, large specific surface area and high reactivity, it can be used in the field of environmental remediation, especially for the removal of heavy metals, halogenated compounds, nitrates and other pollution in water and soil. Nanoparticles have broad application prospects, so nano-zero-valent iron has gradua...

Examples

Embodiment 1

[0030] Embodiment one, a kind of preparation method of activated carbon loaded nanometer zero-valent iron composite material, it comprises the following steps:

[0031] Step 1, mix activated carbon, graphite and polytetrafluoroethylene emulsion according to the mass ratio of 8:1:1, use absolute ethanol as the dispersant, take out the mixed slurry after ball milling for 6 hours, the ball milling speed is 120 rpm, and the mixed slurry After the material is gradually converted from a viscous state to a semi-dry state, it is rolled into an activated carbon film with a thickness of 0.35mm on a double-roller machine, and then from top to bottom in the order of activated carbon film, conductive layer, and activated carbon film. The conductive layer is Nickel foam, with a thickness of 0.5mm, is rolled on a double-roller machine several times, boiled in ultrapure water for 30 minutes, vacuum-dried at 60°C for 2 hours, and cut into activated carbon electrode sheets of 40mm×40mm;

[0032...

Embodiment 2

[0036] Embodiment two, a kind of preparation method of activated carbon loaded nanometer zero-valent iron composite material, it comprises the following steps:

[0037] Step 1, mix activated carbon, graphite and polytetrafluoroethylene emulsion according to the mass ratio of 8:1:1, use absolute ethanol as the dispersant, take out the mixed slurry after ball milling for 4 hours, the ball milling speed is 100 rpm, and the mixed slurry After the material is gradually converted from a viscous state to a semi-dry state, it is rolled into an activated carbon film with a thickness of 0.40mm on a double-roller machine, and then from top to bottom in the order of activated carbon film, conductive layer, and activated carbon film. The conductive layer is Nickel foam, with a thickness of 0.7mm, is rolled on a double-roller machine several times, boiled in ultra-pure water for 35 minutes, vacuum-dried at 65°C for 2.5 hours, and cut into activated carbon electrode sheets of 32mm×32mm;

[0...

Embodiment 3

[0041] Embodiment three, a preparation method of activated carbon-loaded nano-zero-valent iron composite material, which comprises the following steps:

[0042] Step 1, mix activated carbon, graphite and polytetrafluoroethylene emulsion according to the mass ratio of 8:1:1, use absolute ethanol as the dispersant, take out the mixed slurry after ball milling for 6 hours, the ball milling speed is 150 rpm, and the mixed slurry After the material is gradually converted from a viscous state to a semi-dry state, it is rolled into an activated carbon film with a thickness of 0.40mm on a double-roller machine, and then from top to bottom in the order of activated carbon film, conductive layer, and activated carbon film. The conductive layer is Nickel foam, with a thickness of 1.0mm, is rolled on a double-roller machine several times, boiled in ultrapure water for 40 minutes, vacuum-dried at a temperature of 63°C for 3 hours, and cut into activated carbon electrode sheets of 48mm×48mm;...

technical field

[0001] The invention relates to the field of material preparation, in particular to a preparation method of activated carbon-supported nano zero-valent iron composite material. Background technique

[0002] With the rapid development of our country's society and economy, the problem of environmental pollution is becoming more and more prominent, and its negative impact is also becoming more and more significant. Therefore, it is more and more urgent to strengthen the research and development of environmental pollution control materials.

[0003] Nano zero-valent iron is a new and efficient environmental remediation technology. Because of its small particles, large specific surface area and high reactivity, it can be used in the field of environmental remediation, especially for the removal of heavy metals, halogenated compounds, nitrates and other pollution in water and soil. Nanoparticles have broad application prospects, so nano-zero-valent iron has gradua...

Examples

Embodiment 1

[0030] Embodiment one, a kind of preparation method of activated carbon loaded nanometer zero-valent iron composite material, it comprises the following steps:

[0031] Step 1, mix activated carbon, graphite and polytetrafluoroethylene emulsion according to the mass ratio of 8:1:1, use absolute ethanol as the dispersant, take out the mixed slurry after ball milling for 6 hours, the ball milling speed is 120 rpm, and the mixed slurry After the material is gradually converted from a viscous state to a semi-dry state, it is rolled into an activated carbon film with a thickness of 0.35mm on a double-roller machine, and then from top to bottom in the order of activated carbon film, conductive layer, and activated carbon film. The conductive layer is Nickel foam, with a thickness of 0.5mm, is rolled on a double-roller machine several times, boiled in ultrapure water for 30 minutes, vacuum-dried at 60°C for 2 hours, and cut into activated carbon electrode sheets of 40mm×40mm;

[0032...

Embodiment 2

[0036] Embodiment two, a kind of preparation method of activated carbon loaded nanometer zero-valent iron composite material, it comprises the following steps:

[0037] Step 1, mix activated carbon, graphite and polytetrafluoroethylene emulsion according to the mass ratio of 8:1:1, use absolute ethanol as the dispersant, take out the mixed slurry after ball milling for 4 hours, the ball milling speed is 100 rpm, and the mixed slurry After the material is gradually converted from a viscous state to a semi-dry state, it is rolled into an activated carbon film with a thickness of 0.40mm on a double-roller machine, and then from top to bottom in the order of activated carbon film, conductive layer, and activated carbon film. The conductive layer is Nickel foam, with a thickness of 0.7mm, is rolled on a double-roller machine several times, boiled in ultra-pure water for 35 minutes, vacuum-dried at 65°C for 2.5 hours, and cut into activated carbon electrode sheets of 32mm×32mm;

[0...

Embodiment 3

[0041] Embodiment three, a preparation method of activated carbon-loaded nano-zero-valent iron composite material, which comprises the following steps:

[0042] Step 1, mix activated carbon, graphite and polytetrafluoroethylene emulsion according to the mass ratio of 8:1:1, use absolute ethanol as the dispersant, take out the mixed slurry after ball milling for 6 hours, the ball milling speed is 150 rpm, and the mixed slurry After the material is gradually converted from a viscous state to a semi-dry state, it is rolled into an activated carbon film with a thickness of 0.40mm on a double-roller machine, and then from top to bottom in the order of activated carbon film, conductive layer, and activated carbon film. The conductive layer is Nickel foam, with a thickness of 1.0mm, is rolled on a double-roller machine several times, boiled in ultrapure water for 40 minutes, vacuum-dried at a temperature of 63°C for 3 hours, and cut into activated carbon electrode sheets of 48mm×48mm;...

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