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Catalyst for degrading chlorophenol pollutants and preparation method and applications thereof

A catalyst and chlorophenol technology, applied in the field of graphene-immobilized Schiff base-copper complex catalyst and its preparation, can solve problems such as secondary pollution of metal ions, and achieve the effects of high removal rate and low energy consumption

Active Publication Date: 2018-06-29
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In view of the reaction conditions of the catalytic degradation reaction of the Schiff base metal complex catalyst in the prior art, most of them are limited to the organic phase, and require a certain amount of external heating or pressure, and will cause a certain amount of secondary pollution of metal ions , the present invention aims to provide a graphene-immobilized Schiff base-copper complex catalyst and its preparation method, and the application of the catalyst in the process of activating persulfate to degrade chlorophenols

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  • Catalyst for degrading chlorophenol pollutants and preparation method and applications thereof
  • Catalyst for degrading chlorophenol pollutants and preparation method and applications thereof
  • Catalyst for degrading chlorophenol pollutants and preparation method and applications thereof

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Embodiment 1

[0048] The reagent material used in the present embodiment comprises aminated reduced graphene oxide (TEPA-rGO), 3,5-dibromosalicylaldehyde, copper acetate monohydrate and dehydrated alcohol, and described TEPA-rGO nitrogen content is 9.34%, purchased from Nanjing Xianfeng Nano Material Technology Co., Ltd., the described 3,5-dibromosalicylaldehyde was purchased from Bailingwei; the described copper acetate monohydrate was purchased from Nanjing Chemical Reagent Co., Ltd.; Water and ethanol were purchased from Nanjing Chemical Reagent Co., Ltd.

[0049] The synthesis process of the graphene-supported Schiff base-copper complex catalyst in this example is as follows: firstly, aminated reduction graphene oxide and 3,5-dibromosalicylaldehyde are reacted in an ethanol system to synthesize 3,5- Dibromosalicylaldehyde Schiff base; then reacting copper acetate monohydrate and 3,5-dibromosalicylaldehyde Schiff base in an ethanol system to synthesize a Schiff base-copper complex, the s...

Embodiment 2

[0066] The reagent material used in the present embodiment is the same as that of the embodiment 1, and the synthesis process of the graphene-supported Schiff base-copper complex catalyst in the present embodiment is as follows:

[0067] (1) Weigh 500 mg of aminated reduced graphene oxide and disperse it in 100 mL of absolute ethanol, ultrasonically disperse for 18 minutes with an ultrasonic disperser, and transfer the system to a round-bottomed flask.

[0068] (2) At the same time, weigh 373mg of 3,5-dibromosalicylaldehyde, dissolve it in 100mL of absolute ethanol, and slowly add it dropwise to the previous round bottom flask, keep stirring, condense and reflux, heat in a water bath, and keep the temperature at 65 °C, react for 11 hours. After the reaction was completed, the system was cooled down, and the filter cake was washed with absolute ethanol for 3 times, dried at 50° C. for 10 hours, and collected to obtain the intermediate product.

[0069] (3) Weigh 500 mg of the ...

Embodiment 3

[0073] The reagent material used in the present embodiment is the same as that of the embodiment 1, and the synthesis process of the graphene-supported Schiff base-copper complex catalyst in the present embodiment is as follows:

[0074] (1) Weigh 500 mg of aminated reduced graphene oxide and disperse it in 100 mL of absolute ethanol, ultrasonically disperse for 30 minutes with an ultrasonic disperser, and transfer the system to a round bottom flask.

[0075] (2) Weigh 373mg of 3,5-dibromosalicylaldehyde at the same time, dissolve it in 100mL of absolute ethanol, and slowly add it dropwise to the previous round bottom flask, keep stirring, condense and reflux, heat in a water bath, and keep the temperature at 70 °C, react for 12 hours. After the reaction was completed, the system was cooled down, and the filter cake was washed with absolute ethanol for 3 times, dried at 50° C. for 10 hours, and collected to obtain the intermediate product.

[0076] (3) Weigh 500 mg of the abo...

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Abstract

The invention discloses a catalyst for degrading chlorophenol pollutants and a preparation method and applications thereof, and belongs to the fields of environment function materials and catalysis. The catalyst is prepared by following steps: at first, reacting aminated reduced graphene oxide with 3,5-dibromo salicylaldehyde in an ethanol system to synthesize 3,5-dibromo salicylaldehyde Schiff base; and then reacting copper acetate monohydrate with 3,5-dibromo salicylaldehyde Schiff base in an ethanol system to synthesize a Schiff base-copper complex. The catalyst can activate chlorophenol pollutants in a potassium persulfate degradation water solution. The method of eliminating chlorophenol pollutants comprises following steps: (a) preparing a catalyst solution from the catalyst and deionized water, and preparing a potassium persulfate solution from potassium persulfate and deionized water; and (b) mixing the catalyst solution, the potassium persulfate solution, and a water solutioncontaining chlorophenol pollutants, adding the mixed solution into deionized water, and carrying out reactions under vibration in the absence of light. The preparation method is simple, the catalyst activates potassium sulfate under mild conditions, and the energy consumption and pollution are low.

Description

technical field [0001] The invention belongs to the field of environmental functional materials and catalysis, and relates to a preparation method and application of a heterogeneous catalyst supported by a novel nanomaterial, in particular to a method for degrading chlorophenols by activating persulfate in water under normal temperature and pressure Graphene-immobilized Schiff base-copper complex catalyst and preparation method thereof. Background technique [0002] Transition metal complexes have been extensively studied as homogeneous catalysts, but these complexes have problems such as difficult recovery and metal ion contamination in practical applications. [0003] Schiff base (Schiff base), mainly refers to a class of organic compounds containing imine or imine characteristic group (-RC=N-), usually Schiff base is formed by condensation of amine and active carbonyl or aldehyde group . Schiff bases are currently widely used in many fields, including the field of biolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J35/10C02F1/72
CPCC02F1/722C02F1/725B01J31/2217C02F2101/36C02F2101/345B01J35/61
Inventor 高士祥钱力邵帅
Owner NANJING UNIV
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