Sea urchin-shaped nickel-cobalt hydrotalcite stainless steel net film and preparation method and application thereof

A stainless steel mesh and sea urchin-shaped technology, applied in the field of water treatment, can solve problems such as difficulty in applying large-scale industrial production, difficult to meet oil-water separation, complex and cumbersome preparation process, etc., achieve excellent anti-pollution ability, excellent anti-oil pollution ability, reduce cost effect

Active Publication Date: 2021-07-23
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The inherent lipophilicity of SSM still poses a great challenge to its anti-pollution ability. Even the separation filter modified by related methods is only tested for low-viscosity light oil, not suitable for crude oil Such viscous oil is difficult to meet the oil-water separation under complex conditions;
[0005] (2) SSM has a large pore size and poor oil pressure resistance. It is only used for the separation of oil-water mixtures and does not meet the needs of high-precision oil-water emulsions;
[0006] (3) The related preparation process (such as plasma etching, ATR atom transfer polymerization, etc.) is complex and cumbersome, and the equipment requirements are high, so it is difficult to apply to large-scale industrial production

Method used

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  • Sea urchin-shaped nickel-cobalt hydrotalcite stainless steel net film and preparation method and application thereof
  • Sea urchin-shaped nickel-cobalt hydrotalcite stainless steel net film and preparation method and application thereof
  • Sea urchin-shaped nickel-cobalt hydrotalcite stainless steel net film and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A sea urchin-like nickel-cobalt hydrotalcite stainless steel mesh is prepared through the following steps:

[0048] (1) Take a 2500-mesh stainless steel mesh and cut it into a square with a size of 5cm×5cm, and wash it with ethanol and deionized water for several minutes;

[0049] (2) Carry out surface hydroxylation treatment to the cleaned stainless steel mesh, specifically: configure piranha solution, take the cleaned stainless steel mesh and put it into the piranha solution, react at 60°C for 3 hours, and take out the stainless steel mesh and washed with deionized water, and stored in deionized water for later use;

[0050] (3) Weigh 4mmol of nickel nitrate hexahydrate, 2mmol of cobalt nitrate, 25mmol of urea and 8mmol of ammonium fluoride and dissolve in 120mL of deionized water, and disperse evenly by ultrasonic to obtain a precursor solution;

[0051] (4) Transfer the precursor solution to a 200mL polytetrafluoroethylene hydrothermal kettle, put the stainless ste...

Embodiment 2

[0054] Different from Example 1, the mesh number of stainless steel in step (1) in this example is 2000 mesh.

Embodiment 3

[0056] The difference from Example 1 is that step (2) in this example uses a mixed solution of sodium hydroxide and sodium persulfate to oxidize the cleaned stainless steel mesh.

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Abstract

The invention discloses a sea urchin-shaped nickel-cobalt hydrotalcite stainless steel net film and a preparation method and application thereof. The preparation method comprises the following steps: cleaning a stainless steel net, performing surface hydroxylation or oxidation treatment on the cleaned stainless steel net, and obtaining the stainless steel net with the hydroxylated or oxidized surface; preparing a precursor solution, wherein the precursor solution comprises a nickel source, a cobalt source, urea and ammonium fluoride; dipping the stainless steel mesh subjected to surface hydroxylation or oxidation in the precursor solution, and modifying the stainless steel mesh by adopting a hydrothermal method; and taking out the modified stainless steel mesh, washing and drying, and obtaining the sea urchin-shaped nickel-cobalt hydrotalcite stainless steel net film. The sea urchin-shaped nickel-cobalt hydrotalcite stainless steel net film has excellent anti-pollution capacity, oil-in-water emulsion and various oil-water mixtures can be separated through gravity, and water-soluble aromatic dye can be efficiently and rapidly degraded.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a sea urchin-shaped nickel-cobalt hydrotalcite stainless steel mesh and its preparation method and application. Background technique [0002] In the face of frequent oil spill accidents and a large amount of printing and dyeing wastewater discharged from the manufacturing industry, membrane separation is an efficient and convenient wastewater treatment technology. However, traditional membrane separation materials are prone to membrane fouling in oil-water separation, resulting in a sharp decrease in membrane flux and separation efficiency. And for the treatment of complex oily wastewater containing oil-in-water emulsions of small-sized oil droplets and small-molecule dyes, membrane separation technology often faces problems such as low selectivity and high operating pressure, which seriously restricts its practical application development. Therefore, there is an urgent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/02B01D67/00B01D61/40C02F1/40C02F1/44C02F1/72B01J23/755C02F101/30
CPCB01D71/022B01D71/024B01D67/0039B01D67/0051B01D69/02B01D61/40C02F1/40C02F1/44C02F1/722C02F1/725B01J23/755C02F2101/308
Inventor 何毅殷祥英麻晓宇范毅李虹杰吴靖成
Owner SOUTHWEST PETROLEUM UNIV
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