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Co/Ni-Keggin type heteropolyacid-carbon nanofiber electrode and preparation method and application thereof

A carbon nanofiber, porous carbon fiber technology, applied in chemical instruments and methods, water/sewage treatment, chemical/physical processes, etc., to achieve the effects of high porosity, improved electrical conductivity, enhanced mass transfer and pollutant degradation

Pending Publication Date: 2021-11-12
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the efficient uniform compounding of Co-POM and carbon nanofibers and its application in photocatalytic degradation of organic wastewater have not been reported yet.

Method used

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  • Co/Ni-Keggin type heteropolyacid-carbon nanofiber electrode and preparation method and application thereof
  • Co/Ni-Keggin type heteropolyacid-carbon nanofiber electrode and preparation method and application thereof
  • Co/Ni-Keggin type heteropolyacid-carbon nanofiber electrode and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of preparation method of Co-Keggin type heteropolyacid-carbon nanofiber electrode, concrete steps are as follows:

[0032] (1) Preparation of Co-Keggin type heteropolyacid: weigh 0.712g (CH 3COO) 2 Co 4H 2 O dissolved in 16 mL of 0.5 mol / L CH 3 In the COOK solution, adjust the pH to 8 with HCl, and stir for 15 min. To the above solution was added 1.977g Na 10 (α-SiW 9 o 34 )·19H 2 O, stirred at 40°C for 45min, cooled the mixture to room temperature, and put it in a refrigerator (-5°C) for 10min. The slurry was separated by centrifugation, and the obtained product was freeze-dried, placed in a quartz crucible, and high-purity N 2 (Purity 99.999%) Calcined under atmosphere protection, gas flow rate 100-200 mL / min, temperature raised to 700 °C at a rate of 5 °C / min, and calcined for 12 hours to obtain Co-Keggin type heteropolyacid.

[0033] (2) Preparation of Co-Keggin type heteropolyacid-carbon nanofiber composites by electrospinning: take 0.5g of Co-Keggi...

Embodiment 2

[0037] A kind of preparation method of Co / Ni-Keggin type heteropolyacid-carbon nanofiber electrode, concrete steps are as follows:

[0038] (1) Preparation of Co / Ni-Keggin type heteropolyacid: weigh 0.352g (CH 3 COO) 2 Co 4H 2 O and 0.336 g (CH 3 COO) 2 Ni·4H 2 O dissolved in 16 mL of 1mol / L CH 3 In the COOK solution, adjust the pH to 8 with HCl, and stir for 15 min. To the above solution was added 1.977g Na 10 (α-SiW 9 o 34 )·19H 2 O, stirred at 40°C for 45min, cooled the mixture to room temperature, and put it in a refrigerator (-5°C) for 10min. The slurry was separated by centrifugation, and the obtained product was freeze-dried, placed in a quartz crucible, and high-purity N 2 (Purity 99.999%) Calcined under atmosphere protection, gas flow rate 100-200mL / min, temperature raised to 700°C at a rate of 5°C / min, and calcined for 12h, to obtain Co / Ni-Keggin type heteropolyacid.

[0039] (2) Preparation of Co / Ni-Keggin type heteropolyacid-carbon nanofiber composites ...

Embodiment 3

[0044] The Co / Ni-Keggin type heteropolyacid-carbon nanofiber composite material that embodiment 2 makes is used as anode in the electrochemical oxidation device (the sewage of laboratory simulation), with common refractory erythromycin and high Toxic algae toxins are the target of degradation, and their degradation efficiency on typical highly toxic and refractory pollutants in actual industrial wastewater is investigated.

[0045] like image 3 Shown is that the Co / Ni-Keggin type heteropolyacid-carbon nanofiber composite material that embodiment 2 makes is used for degrading the degradation rate figure of erythromycin and algae toxin, by image 3 It can be seen that the Co / Ni-Keggin type heteropoly acid-carbon nanofiber composite material has a removal rate of more than 90% to erythromycin in 40 minutes, and a removal rate of algae toxins in 60 minutes has reached more than 90%. And the degradation effect of algae toxin is obvious.

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Abstract

The invention discloses a Co / Ni-Keggin type heteropolyacid-carbon nanofiber electrode and a preparation method and application thereof. The electrode comprises Co / Ni-Keggin type heteropolyacid and porous carbon fibers, and the Co / Ni-Keggin type heteropolyacid is embedded in the porous carbon fibers to form a Co / Ni-Keggin type heteropolyacid-carbon nanofiber composite material; and the Co / Ni-Keggin type heteropolyacid-carbon nanofiber composite material is prepared into the photoelectric active membrane electrode. The preparation method comprises the following steps: firstly preparing Co / Ni-Keggin type heteropolyacid, then preparing a Co / Ni-Keggin type heteropolyacid-carbon nanofiber composite material through electrostatic spinning, and finally preparing the Co / Ni-Keggin type heteropolyacid-carbon nanofiber into the photoelectric active membrane electrode. The electrode material obtained through electrostatic spinning is of a porous carbon fiber structure, is high in porosity, large in specific surface area and large in membrane flux and has the characteristic of efficiently degrading organic pollutants.

Description

technical field [0001] The invention belongs to the field of electrode materials for industrial wastewater treatment, and in particular relates to a Co / Ni-Keggin type heteropolyacid-carbon nanofiber electrode and its preparation method and application. Background technique [0002] With the development of the economy, the discharge of refractory industrial wastewater has increased sharply, and the resulting water pollution has become an important issue of environmental pollution in my country and even in the world. Industrial organic wastewater has high hydrophilicity and bioaccumulation, which is extremely harmful to human health, so the treatment of industrial organic wastewater is urgent. The treatment process of industrial organic wastewater includes biological methods, physical methods and chemical methods. Organic wastewater has a certain toxicity to microorganisms, making them unable to effectively degrade organic pollutants such as mineralized water. Physical metho...

Claims

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Application Information

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IPC IPC(8): B01J31/22B01J35/10C02F1/72C02F101/30
CPCB01J27/188C02F1/725C02F2101/30C02F2101/305B01J35/61
Inventor 程峰丁静亚许琦
Owner YANCHENG INST OF TECH