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Nano-copper array cathode for reductive degradation of organic pollutants as well as preparation and application thereof

A technology of organic pollutants and nano-copper, applied in water pollutants, water/sewage treatment, water/sludge/sewage treatment, etc. Problems such as being too scattered, achieving the effect of being suitable for large-scale production, compact arrangement, and reducing production costs

Inactive Publication Date: 2017-10-13
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN101250725A discloses a method for preparing copper octahedral nanoparticles uniformly distributed in a large area. The surface of nano-copper prepared by this method is evenly distributed and has good dispersion; The problem of increased strength and reduced plasticity, but both technologies are based on two-dimensional flat substrate materials, and the loaded nano-copper particles are too dispersed or too dense, resulting in low utilization efficiency of the substrate surface
Patent CN103046088A, patent CN106435665A, and patent CN103132111A disclose the method of preparing micro-nano-scale porous copper surface by electrodeposition using hydrogen bubble dynamic template method. The copper surface prepared by this method has a natural multi-scale surface structure and a large specific surface area. Nano-copper is not tightly attached, has low mechanical strength and is easy to fall off

Method used

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  • Nano-copper array cathode for reductive degradation of organic pollutants as well as preparation and application thereof
  • Nano-copper array cathode for reductive degradation of organic pollutants as well as preparation and application thereof
  • Nano-copper array cathode for reductive degradation of organic pollutants as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Take 6×2.5cm 2 Copper foam, ultrasonically soaked with acetone for 15 minutes, cleaned with ultrapure water, then ultrasonically soaked with 1% sulfuric acid for 15 minutes, cleaned with ultrapure water, and dried;

[0039] (2) Get 250mL electrolyte in 260mL electrolytic cell, take step (1) copper foam as working electrode, mixed oxide (MMO) electrode as counter electrode, Ag / AgCl saturated KCl as reference electrode, form three-electrode system; The electrolyte composition is: 0.03mol / L copper sulfate (CuSO 4 ·5H 2O), 0.0025mol / L nickel sulfate (NiSO 4 ·6H 2 O), 0.24mol / L sodium dihydrogen phosphate (NaH 2 PO 4 ·H 2 O), 0.05mol / L sodium citrate (Na 3 C 6 h 5 o 7 2H 2 O), 0.50mol / L boric acid (H 3 BO 3 );

[0040] (3) Set the cathode potential to -0.92V, carry out constant potential deposition at room temperature, the deposition time is 10 minutes, wash with ultrapure water and dry for later use.

[0041] Figure 1 ~ Figure 2 Shown is the topography ...

Embodiment 2

[0045] (1) Take 6×2.5cm 2 Copper foam, ultrasonically soaked with acetone for 15 minutes, cleaned with ultrapure water, then ultrasonically soaked with 1% sulfuric acid for 15 minutes, cleaned with ultrapure water, and dried;

[0046] (2) Get 250mL electrolyte in 260mL electrolytic cell, take step (1) copper foam as working electrode, mixed oxide (MMO) electrode as counter electrode, Ag / AgCl saturated KCl as reference electrode, form three-electrode system; The electrolyte composition is: 0.03mol / L copper sulfate (CuSO 4 ·5H 2 O), 0.0025mol / L nickel sulfate (NiSO 4 ·6H 2 O), 0.24mol / L sodium dihydrogen phosphate (NaH 2 PO 4 ·H 2 O), 0.05mol / L sodium citrate (Na 3 C 6 h 5 o 7 2H 2 O), 0.50mol / L boric acid (H 3 BO 3 );

[0047] (3) Set the cathode potential to -0.92V, carry out constant potential deposition at room temperature, the deposition time is 15 minutes, wash with ultrapure water and dry for later use.

[0048] The morphology of the nano-copper array catho...

Embodiment 3

[0052] (1) Take 6×2.5cm 2 Copper foam, ultrasonically soaked with acetone for 15 minutes, cleaned with ultrapure water, then ultrasonically soaked with 1% sulfuric acid for 15 minutes, cleaned with ultrapure water, and dried;

[0053] (2) Get 250mL electrolyte in 260mL electrolytic cell, take step (1) copper foam as working electrode, mixed oxide (MMO) electrode as counter electrode, Ag / AgCl saturated KCl as reference electrode, form three-electrode system; The electrolyte composition is: 0.03mol / L copper sulfate (CuSO 4 ·5H 2 O), 0.0025mol / L nickel sulfate (NiSO 4 ·6H 2 O), 0.24mol / L sodium dihydrogen phosphate (NaH 2 PO 4 ·H 2 O), 0.05mol / L sodium citrate (Na 3 C 6 h 5 o 7 2H 2 O), 0.50mol / L boric acid (H 3 BO 3 );

[0054] (3) Set the cathode potential to -0.92V, carry out constant potential deposition at room temperature, the deposition time is 5 minutes, wash with ultrapure water and dry for later use.

[0055] The nano-copper array cathode prepared in Exam...

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Abstract

The invention provides a nano-copper array cathode for reductive degradation of organic pollutants as well as preparation and application thereof. Under a condition of lower cathode constant electric potential, through one-step electrodeposition, nano-copper arrays are loaded on surfaces of substrate materials such as three-dimensional foam copper, the obtained nano-copper sheet arrays are uniformly distributed, tightly arranged and difficult to fall off; the dimension length of the nano-copper sheet is less than 500nm, the width is less than 100nm and the thickness is less than 10nm; the prepared nano-copper array cathode is applied to organic pollution water treatment, precious metal palladium with high price is replaced, so that the manufacturing cost of an electrode is greatly reduced while the degradation efficiency of the organic pollutants is improved at the same time. According to the nano-copper array cathode disclosed by the invention, the process is simple, raw materials are low in cost and easy to obtain, and the possibility is provided for magnification scale production.

Description

technical field [0001] The invention relates to the application of electrochemistry and nanotechnology in the field of water treatment, in particular to a nano-copper array cathode for reducing and degrading organic pollutants and its preparation and application. Background technique [0002] Organic pollutants are frequently detected in water pollution surveys around the world, especially the high detection rates of halogenated organic compounds and nitroaromatic hydrocarbons, which seriously threaten the safety of drinking water for residents. At present, the remediation technologies for organic pollutants mainly include physical, biological, and chemical methods. Due to the rapid and thorough degradation of pollutants in chemical remediation methods, it is a more commonly used technology. Compared with chemical oxidation, chemical reduction technology has the degradation selectivity to pollutants. Taking chlorinated organic pollutants as an example, due to the electroneg...

Claims

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Application Information

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IPC IPC(8): C02F1/461C25D3/38C25D5/34C25D7/00C02F101/30
CPCC02F1/46109C02F1/4676C02F2001/46138C02F2101/30C25D3/38C25D5/34C25D7/00
Inventor 张芳刘波陈文锶李广贺陆奇张旭侯德义
Owner TSINGHUA UNIV
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