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Method for preparing nickel ferrite nano-material from nickel-iron-containing electroplating wastewater and applications

A technology of electroplating wastewater and nanomaterials, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of poor performance of carbon dioxide, etc., and achieve the effects of easy recycling, significant environmental protection and economic benefits, and simple synthesis steps

Pending Publication Date: 2021-07-16
佛山经纬纳科环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, nickel ferrite prepared by solvothermal-thermal decomposition method has poor performance in decomposing carbon dioxide.
[0008] The applicant has investigated a large number of patent documents and found that there is no report on the preparation of nickel ferrite nanocrystals by using electroplating wastewater, and using this material for photocatalytic reduction of CO in a specific system. 2 produce H 2 and CO

Method used

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  • Method for preparing nickel ferrite nano-material from nickel-iron-containing electroplating wastewater and applications
  • Method for preparing nickel ferrite nano-material from nickel-iron-containing electroplating wastewater and applications
  • Method for preparing nickel ferrite nano-material from nickel-iron-containing electroplating wastewater and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040](1) Transfer the metal ions in the electroplating wastewater to the organic phase: take 20ml of 0.05mol / L nickel-iron-containing electroplating wastewater, add 10ml of ethanol, 20ml of n-hexane, and 2mmol of oleylamine. The heating and stirring system was maintained at 70°C for 1h. The metal ions are transferred from the lower aqueous phase to the upper organic solution phase.

[0041] (2) Cool the system in step (1) to room temperature and transfer it to a reaction kettle, add 10ml of NaOH solution with 5mmol, 10mmol, and 15mmol of substances, respectively, heat to 180°C, and react at constant temperature for 24h. After the reaction is finished, the solution system is separated into layers, the lower aqueous phase is removed, the nickel ferrite in the organic phase is centrifuged, washed and dried to obtain the nickel ferrite nanomaterial.

[0042] The XRD spectrum of the nickel ferrite synthesized in this embodiment under different alkali addition conditions is as fol...

Embodiment 2

[0044] (1) Transfer the metal ions in the electroplating wastewater to the organic phase: take 20ml of 0.05mol / L ferronickel-containing electroplating wastewater, add 10ml of ethanol, 20ml of n-hexane, and 2mmol of sodium dodecylbenzenesulfonate. The heating and stirring system was maintained at 70°C for 1h. The metal ions are transferred from the lower aqueous phase to the upper organic solution phase.

[0045] (2) Cool the system in step (1) to room temperature and transfer it to a reaction kettle, add 10ml of NaOH solution with a substance amount of 10mmol, heat to 180°C, and react at a constant temperature for 24h. After the reaction is finished, the solution system is separated into layers, the lower aqueous phase is removed, the nickel ferrite in the organic phase is centrifuged, washed, and dried to obtain flower-shaped nickel ferrite nanomaterials.

Embodiment 3

[0047] (1) Transfer the metal ions in the electroplating wastewater to the organic phase: take 20ml of 0.05mol / L nickel-iron-containing electroplating wastewater, add 10ml of ethanol, 20ml of n-hexane, and 2mmol of polyacrylamide. The heating and stirring system was maintained at 70°C for 1h. The metal ions are transferred from the lower aqueous phase to the upper organic solution phase.

[0048] (2) Cool the system in step (1) to room temperature and transfer it to a reaction kettle, add 10ml of NaOH solution with a substance amount of 10mmol, heat to 180°C, and react at a constant temperature for 24h. After the reaction is finished, the solution system is separated into layers, the lower aqueous phase is removed, the nickel ferrite in the organic phase is centrifuged, washed, and dried to obtain flower-shaped nickel ferrite nanomaterials.

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Abstract

The invention belongs to the technical field of resourceful treatment of electroplating wastewater, and discloses a method for preparing a nickel ferrite nano-material from nickel-iron-containing electroplating wastewater and applications. The method comprises the following steps: adding an organic solvent and a surfactant into the nickel-iron-containing electroplating wastewater, carrying out a phase transfer reaction at 20-70 DEG C under a stirring condition to transfer metal ions from a lower-layer water phase to an upper-layer organic solution phase, then transferring the solution subjected to the phase transfer reaction into a reaction kettle, adding alkali, carrying out a solvothermal reaction at 80-200 DEG C, and layering the solution system after the reaction is finished; and finally, removing the lower-layer water phase, and centrifuging, washing and drying nickel ferrite in the organic phase to obtain the nickel ferrite nano material. According to the method, nickel ferrite is synthesized by using nickel-iron ions in the electroplating wastewater, and meanwhile, the treatment problem of the electroplating wastewater is solved, wherein the obtained nickel ferrite nano material can be used for photocatalytic reduction of CO2 to generate H2 and CO, and greenhouse effect gas is converted into energy. The method has remarkable environmental protection benefits and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of recycling treatment of electroplating wastewater, and in particular relates to a method and application for preparing nickel ferrite nanomaterials from electroplating wastewater containing nickel and iron. Background technique [0002] Electroplating wastewater is wastewater generated during the electroplating production process, and its main pollutants are various metal ions, among which electroplating wastewater containing nickel, iron, copper, chromium, lead, etc. is one of the common wastewater. The discharge of these heavy metals into nature will have a great poisonous effect on organisms. At present, the common treatment method of electroplating wastewater is to use chemical precipitation to convert the heavy metals in the wastewater into water-insoluble compounds, so as to meet the discharge standards. However, the chemical precipitation method will produce a large amount of electroplating sludge,...

Claims

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Application Information

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IPC IPC(8): C01G53/00B01J23/755B01J37/10B82Y30/00B82Y40/00
CPCC01G53/00B01J23/755B01J23/002B01J37/10B82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2004/30C01P2004/38B01J35/23B01J35/33B01J35/39
Inventor 冯春全李政颜炼红
Owner 佛山经纬纳科环境科技有限公司
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