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Manufacturing method for nanoscale zero-valent iron

A nano-zero-valent iron, a preparation process technology, applied in the field of environmental pollution control and chemical synthesis, can solve the problems of difficult control, small particle size of zero-valent iron, and reduced reactivity, so as to facilitate sampling analysis, convenient access, and avoid Effects of reduced or lost activity

Inactive Publication Date: 2016-01-20
张有科
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In recent years, there have been more and more studies on the synthesis and modification of zero-valent iron. However, the particle size of zero-valent iron is small, and it is easy to agglomerate and reduce the specific surface area, and it is easy to oxidize and reduce the reactivity. During the synthesis of zero-valent iron, The washing and sampling process for zero-valent iron is more cumbersome and difficult to control
At present, there are still some limitations in the control of reaction conditions in the research process of zero-valent iron. In the synthesis process of zero-valent iron, it is usually completed in glass instruments such as round bottom flasks. For the washing of zero-valent iron The sampling process is cumbersome and difficult to control

Method used

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  • Manufacturing method for nanoscale zero-valent iron

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Comparison scheme
Effect test

Embodiment 1

[0013] like figure 1 As shown, place the device on a magnetic stirrer, open the sealed cover, and mix 0.7993g FeSO 4 ·7H 2 0. 40mL distilled water and 0.05g polyethylene glycol are added into the reaction chamber, then the sealing cover is sealed with the reaction chamber through the frosted surface interface, the air inlet device is installed, that is, the gas pipeline interface, and the gas pipeline interface is connected with the nitrogen cylinder, and opened The gas flow control valve continuously feeds nitrogen gas, which is discharged through the exhaust device to replace the air in the reaction chamber. Under vigorous stirring, dilute HNO was added dropwise through the constant pressure separatory funnel 3 0.1mol / L NaBH with pH=3 4 The solution is 200mL, the drop rate of the reaction solution is controlled by the flow control valve of the constant pressure separatory funnel, and the chemical synthesis reaction of nanometer zero-valent iron is carried out in the react...

Embodiment 2

[0015] like figure 1 As shown, place the device on a magnetic stirrer, open the sealed cover, and mix 0.7993g FeSO 4 ·7H 2 0. 40mL of distilled water, 1.0g of molecular sieve and 0.05g of polyethylene glycol are added into the reaction chamber, then the sealing cover is sealed with the reaction chamber through the frosted surface interface, the air inlet device is installed, that is, the gas pipeline interface, and the gas pipeline interface is connected to the nitrogen cylinder Connect, open the gas flow control valve, continuously feed in nitrogen, discharge it through the exhaust device, and replace the air in the reaction chamber. Under vigorous stirring, dilute HNO was added dropwise through the constant pressure separatory funnel 3 0.1mol / L NaBH with pH=3 4 The solution is 200mL, the drop rate of the reaction solution is controlled by the flow control valve of the constant pressure separatory funnel, and the chemical synthesis reaction of nanometer zero-valent iron is...

Embodiment 3

[0017] like figure 1 As shown, place the device on a magnetic stirrer, open the sealed cover, and mix 0.4996g FeSO 4 ·7H 2 0. 40mL distilled water and 0.05g polyethylene glycol are added into the reaction chamber, then the sealing cover is sealed with the reaction chamber through the frosted surface interface, then the air inlet device is installed, that is, the gas pipeline interface, and the gas pipeline interface is connected with the nitrogen cylinder, and opened The gas flow control valve continuously feeds nitrogen gas, which is discharged through the exhaust device to replace the air in the reaction chamber. Under vigorous stirring, dilute HNO was added dropwise through the constant pressure separatory funnel 3 0.1mol / L NaBH with pH=3 4 The solution is 200mL, the drop rate of the reaction solution is controlled by the flow control valve of the constant pressure separatory funnel, and the chemical synthesis reaction of nanometer zero-valent iron is carried out in the ...

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Abstract

The invention discloses a manufacturing method for nanoscale zero-valent iron, and particularly discloses a specific structure of a synthesizing and washing integrated device and a specific synthesizing process of the nanoscale zero-valent iron. The manufacturing process is finished through the synthesizing and washing integrated device. By the adoption of the method, nitrogen can be effectively and continuously led in so as to exhaust oxygen in a reaction chamber, the synthesized zero-valent iron can be simply and conveniently washed under the protective effect of the nitrogen and conveniently filtered out the synthesized zero-valent iron through a filter membrane, sampling analysis is facilitated, the reduction or loss of the activity of the zero-valent iron due to oxidization can be effectively avoided, and the synthesized zero-valent iron can be more conveniently taken and used.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution control and chemical synthesis, and in particular relates to a preparation method of zero-valent iron. Background technique [0002] Zero-valent iron materials have become a very active research field in environmental pollution remediation technology. Zero-valent iron has a large specific surface area, small particle size, large surface energy and high surface activity, and is an environmentally friendly reducing agent. In recent years, zero-valent iron has been able to treat a variety of pollutants, such as organochlorine pesticides, pentachlorophenol, pesticides, halogenated alkanes, halogenated aromatics, polychlorinated biphenyls, heavy metal ions, arsenate and chromate, etc. A variety of pollutants have the function of reduction and transformation, therefore, zero-valent iron can be used in the treatment of environmental pollution and as a new pollution control technology. ...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 张有科
Owner 张有科
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