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Active carbon-loaded nitrogen-doped cobalt catalyst and preparation method and application thereof

A technology of cobalt catalyst and activated carbon, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of biological toxicity, difficult recovery and reuse of catalysts, and secondary pollution, so as to reduce consumption, Excellent dye degradation effect and low cost effect

Active Publication Date: 2015-03-04
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Homogeneous Co / Na 2 CO 3 / H 2 o 2 Although the system has the advantages of high catalytic efficiency and strong oxidation ability, it also has limitations, such as the catalyst is not easy to recycle and reuse, and the biggest disadvantage is the Co in the homogeneous catalytic system. 2+ , although the dosage is not very large, it will still cause potential secondary pollution and biological toxicity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The activated carbon-supported nitrogen-doped cobalt catalyst described in this experiment can be prepared by high-temperature calcination. The specific preparation method is as follows: add 1.225 g of cobalt acetate tetrahydrate into 50 mL of absolute ethanol to fully dissolve, and then weigh 1.95 g of cobalt acetate tetrahydrate. 1,10-Phenanthroline was added to the above ethanol solution and continued to stir until fully dissolved. Then 9.8 g of granular activated carbon was weighed and added to the solution. After fully stirring for 30 min, it was placed in a 100°C incubator for ventilation and drying until the ethanol was completely volatilized. , and then put the dried solid in a tube furnace N 2 calcined at 700 °C for 3 h under protection to obtain a nitrogen-doped cobalt catalyst supported by activated carbon.

Embodiment 2

[0024] Sodium bicarbonate, hydrogen peroxide and the nitrogen-doped cobalt catalyst supported by activated carbon prepared in Example 1 were added to 50 μmol / L acid orange II dye wastewater, the concentration of sodium bicarbonate in the wastewater was 10 mmol / L, and the hydrogen peroxide was The concentration in the wastewater was 10 mmol / L, and the concentration of the nitrogen-doped cobalt catalyst supported by activated carbon in the wastewater was 1 g / L; the decolorization rate of the dye was 92% at 15 minutes, and the loss of cobalt ions was 0.02 mg / L; , without adding 1,10-phenanthroline in the process of preparing the catalyst, the activated carbon-supported cobalt catalyst was obtained, and the dye wastewater was degraded under the same conditions. L; Comparative experiment 2, without adding 1,10-phenanthroline and activated carbon during the preparation of the catalyst, a solid cobalt catalyst was obtained, and the dye wastewater was degraded under the same conditions...

Embodiment 3

[0026] Sodium bicarbonate, hydrogen peroxide and the nitrogen-doped cobalt catalyst supported by activated carbon prepared in Example 1 were added to 50 μmol / L acid orange II dye wastewater, the concentration of sodium bicarbonate in the wastewater was 0.5 mmol / L, and the hydrogen peroxide The concentration in the wastewater was 100 mmol / L, the concentration of the nitrogen-doped cobalt catalyst supported by activated carbon in the wastewater was 10 g / L, and the decolorization rate of the dye was 85.1% after 20 minutes.

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PUM

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Abstract

The invention discloses an active carbon-loaded nitrogen-doped cobalt catalyst and a preparation method and an application thereof. The catalyst adopts active carbon as a load carrier; a cobalt oxide and a nitrogen-containing compound are doped into the active carbon; the active carbon-loaded nitrogen-doped catalyst can be used for degrading pollutants in organic wastewater; a proper amount of bicarbonate, hydrogen peroxide and nitrogen-doped cobalt catalyst are added into the organic wastewater so as to degrade organic pollutants in the wastewater. A preparation method of the active carbon-loaded nitrogen-doped cobalt catalyst is simple, and the cost is low; the catalytic organic pollutant degrading effect is good, the degrading efficiency is high, and the metal ion dissolving rate is low; the active carbon-loaded nitrogen-doped cobalt catalyst can be repeatedly used.

Description

technical field [0001] The invention belongs to the technical field of activated carbon supported metal oxide catalysts, and in particular relates to an activated carbon supported nitrogen-doped cobalt catalyst and a preparation method and application thereof. Background technique [0002] With the continuous expansion of production scale and the rapid development of industrial technology, the pollution sources of organic wastewater containing high concentrations of refractory, toxic and harmful organic wastewater are increasing. The current methods of treating various organic wastewaters include physical, biological and chemical methods, wherein the physical method is to collect and transfer the pollutants, rather than eliminate them. Biological method is currently the most successful and widely used method, but the treatment period is long, and it is difficult to treat pollutants with poor biochemical activity and high biological toxicity. Chemical methods represented by ...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/72
Inventor 徐爱华段炼孙彬哲魏明瑜夏东升李晓霞
Owner WUHAN TEXTILE UNIV
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