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Magnetic Co3O4-C nano material and preparation method thereof as well as application of magnetic Co3O4-C nano material as catalyst for activating peroxymonosulfate to wastewater treatment

A nano-material, co3o4-c technology, applied in the field of wastewater treatment, can solve the problems of difficult recycling of catalysts and environmental hazards, achieve broad practical application prospects, use less catalysts, and improve degradation efficiency

Inactive Publication Date: 2016-08-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the homogeneous Co / PMS system, there are problems such as the difficulty of recycling the catalyst and the potential harm to the environment. Therefore, efficient, stable and easy-to-recycle heterogeneous catalysts have become a research hotspot.

Method used

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  • Magnetic Co3O4-C nano material and preparation method thereof as well as application of magnetic Co3O4-C nano material as catalyst for activating peroxymonosulfate to wastewater treatment
  • Magnetic Co3O4-C nano material and preparation method thereof as well as application of magnetic Co3O4-C nano material as catalyst for activating peroxymonosulfate to wastewater treatment
  • Magnetic Co3O4-C nano material and preparation method thereof as well as application of magnetic Co3O4-C nano material as catalyst for activating peroxymonosulfate to wastewater treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: Experiments compared the use of magnetic Co 3 o 4 -C nanomaterial activated potassium hydrogen persulfate, adding magnetic Co alone 3 o 4 -C nanomaterials and the removal rate of RhB in three ways of adding potassium monopersulfate alone.

[0041] (1) Dissolve 10mmol fumaric acid and 20mmol NaOH in 50mL deionized water, stir until clear and transparent, then place in an oven and dry overnight at 110°C, the resulting white powder is disodium fumarate; then add 10mmol Co(NO 3 ) 2 ·6H 2 O and 10 mL of disodium fumarate were dissolved in 20 mL of deionized water, and stirred at room temperature for 2 h. The resulting precipitate was vacuum filtered, washed with deionized water three times, and dried at 100 ° C for 12 h to obtain a cobalt-based metal organic framework. compound; then the cobalt-based metal-organic framework compound was calcined at 500°C for 4h under the protection of nitrogen, and then calcined at 450°C for 1h in air to obtain magnetic Co 3...

Embodiment 2

[0048] Example 2: The experiment compares the magnetic Co synthesized by different organic ligands 3 o 4 -C nanomaterials activated potassium hydrogen persulfate on the degradation of RhB.

[0049] (1) Dissolve 10mmol fumaric acid and 20mmol NaOH in 50mL deionized water, stir until clear and transparent, then place in an oven and dry overnight at 110°C, the resulting white powder is disodium fumarate; then add 10mmol Co(NO 3 ) 2 ·6H 2 O and 10 mL of disodium fumarate were dissolved in 20 mL of deionized water, and stirred at room temperature for 2 h. The resulting precipitate was vacuum filtered, washed with deionized water three times, and dried at 100 ° C for 12 h to obtain a cobalt-based metal organic framework. compound; then the cobalt-based metal-organic framework compound was calcined at 500°C for 4h under the protection of argon, and then calcined at 450°C for 1h in air to obtain magnetic Co 3 o 4 -C nanomaterials. The prepared magnetic Co 3 o 4 -C nanomaterial...

Embodiment 3

[0056] Example 3: Experiments compared the use of different cobalt metal organic framework materials as precursors to prepare magnetic Co 3 o 4 The removal rate of RhB activated by C nanomaterials under acidic, neutral and alkaline conditions.

[0057] (1) Dissolve 10mmol fumaric acid and 20mmol NaOH in 50mL deionized water, stir until clear and transparent, then place in an oven and dry overnight at 110°C, the resulting white powder is disodium fumarate; then add 10mmol Co(NO 3 ) 2 ·6H 2 O and 10 mL of disodium fumarate were dissolved in 20 mL of deionized water, and stirred at room temperature for 3 h. The resulting precipitate was vacuum filtered, washed with deionized water for 4 times, and dried at 90°C for 18 h to obtain a cobalt-based metal-organic framework. compound; then the cobalt-based metal-organic framework compound was calcined at 650°C for 5h under the protection of nitrogen, and then calcined at 450°C for 3h in air to obtain magnetic Co 3 o 4 -C nanomater...

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Abstract

The invention discloses a magnetic Co3O4-C nano material and a preparation method thereof as well as application of the magnetic Co3O4-C nano material as a catalyst for activating peroxymonosulfate to wastewater treatment and belongs to the technical field of water pollution control. The method takes a cobalt metal-organic framework compound as a precursor, and the precursor is calcined at a high temperature in a certain atmosphere to finally obtain the magnetic Co3O4-C nano material. A porous carbon component in the material can be used as a carrier of metal oxide so that catalytic sites are uniformly distributed, and pollutants in a water body can be effectively enriched so that the system degradation efficiency is improved; and a magnetic Co3O4 component in the material can be used as a heterogeneous catalyst for efficiently activating peroxymonosulfate to generate free radicals for degrading the pollutants in the water body. The method has the characteristics of high efficiency and convenience, wide pH applicable range, capability of recycling the catalyst through an external magnetic field, good circulating usability and environmental friendliness, and has an extremely great potential to actual treatment application of organic wastewater.

Description

technical field [0001] The invention relates to the technical field of water pollution control, in particular to a magnetic Co 3 o 4 -C nanometer material and its preparation method are used as catalyst to activate persulfate in wastewater treatment. Background technique [0002] In recent years, based on the sulfate radical (SO 4 -· ) advanced oxidation technology has been favored more and more because of its advantages such as wide application range, high treatment efficiency and low cost. Generate SO 4 -· The oxidizing agent has persulfate (PMS, HSO 5 - ) and peroxodisulfate (PDS, S 2 o 8 2- ) two kinds. Compared with peroxodisulfate, peroxomonosulfate has the following characteristics: (1) It is more easily activated by transition metals, and has the dual properties of oxidizing agent and reducing agent at the same time, which is beneficial to the catalytic reaction in the activation system; (2) PMS HCO 3 - , CO 3 2- (3) PMS can generate OH and SO at the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75C02F1/72
CPCC02F1/725B01J23/75B01J37/086C02F2305/02B01J35/33
Inventor 万金泉蒲嘉懿王艳马邕文
Owner SOUTH CHINA UNIV OF TECH
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