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Micron-order Fenton-like catalyst, and preparation method and application thereof

A catalyst, a type of technology, applied in the field of catalysis, can solve problems such as instability, difficult recovery, and low catalyst activity, and achieve the effects of easy recovery, simple preparation process, and wide application value

Inactive Publication Date: 2013-09-11
SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The task of the present invention is to provide a Fenton-like catalyst, which has the characteristics of simple preparation process, environmental protection, cheap and easy-to-obtain raw materials, high catalytic activity, stable chemical performance, and easy recovery, so as to overcome the catalyst activity in the use process of the existing Fenton-like catalyst. Not high, unstable, difficult to recycle, etc.

Method used

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  • Micron-order Fenton-like catalyst, and preparation method and application thereof
  • Micron-order Fenton-like catalyst, and preparation method and application thereof
  • Micron-order Fenton-like catalyst, and preparation method and application thereof

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Embodiment 1

[0033] Weigh 2.416g Cu(NO 3 ) 2 ·3H 2 O with 4.04g Fe(NO 3 ) 3 9H 2 O was dissolved in 60mL of water and stirred at 25°C for 2h. With stirring, 15 mL of a solution containing 8 g of NaOH was added dropwise. Stir for another 30 min, add 1 mL of n-propionaldehyde, and continue stirring for 10 min to obtain a dark brown sol. Finally, the obtained 75mL dark brown sol was transferred to a 10mL polytetrafluoroethylene reactor and kept at 180°C for 48h to obtain micron-sized CuFeO 2 Fenton-like catalyst.

Embodiment 2

[0035] The XRD collection of illustrative plates of the granular product prepared by the inventive method and chalcopyrite CuFeO 2 Standard XRD card (No.75-2146) compares, finds that the product that the inventive method makes has typical chalcopyrite structure, does not have the generation of impurity phases such as iron oxide, cupric oxide and cuprous oxide, and its result and CuFeO 2 Standard XRD spectrogram (JCPDS File No.75-2146) is consistent, proves that the product prepared by the present invention is indeed chalcopyrite CuFeO 2 ,See figure 1 . The binding energy of the product surface Cu2p3 / 2 and Cu2p1 / 2 that the inventive method makes is respectively 932.1eV and 951.8eV, proves that the valence state of Cu on the product surface that the inventive method makes is monovalent, see figure 2 . The granular product prepared by the method of the invention is a rhombohedral hexahedron, and the particle diameter is about 2-3 μm. See image 3 . After the dispersion liq...

Embodiment 3

[0037] Micron CuFeO of the present invention 2 The Fenton-like catalyst was dispersed in 3mL distilled water, ultrasonically dispersed, and an equal volume of 1mmol L -1 3,3,5,5-Tetramethylbenzidine aqueous solution mixed, then add H 2 o 2 (final concentration is 5.0×10 -7 ~2.0×10 -4 mol L -1 ). At this time, the substrate 3,3,5,5-tetramethylbenzidine will be catalyzed and oxidized to generate a blue product with a maximum absorption wavelength of 650nm. After reacting for 15 minutes, quickly take 2 mL of the reaction solution and centrifuge it, and measure its absorbance at 650 nm on a UV-Vis spectrophotometer. The change value of the absorbance A of this kind of enzyme catalytic system at 650nm and H 2 o 2 Concentration at 5.0×10 -7 ~2.0×10 -4 mol L -1 There is a good linear relationship in the range. Utilizing the excellent performance of this kind of enzyme catalytic system, it can be conveniently used in low concentration H in actual samples such as food, envi...

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Abstract

The invention provides a Fenton-like catalyst which is chalcopyrite CuFeO2. A preparation method for the Fenton-like catalyst comprises the following steps: dissolving the raw materials ferric nitrate and cupric nitrate in water; adding alkali and a weak reducing agent to prepare a sol; and subjecting the sol to a hydro-thermal reaction so as to prepare the CuFeO2 Fenton-like catalyst. The Fenton-like catalyst provided by the invention has the advantages of simple preparation process, low cost, no organic solvent, environment-friendliness and stable chemical activity; since the particle of the Fenton-like catalyst is micron order, the Fenton-like catalyst can rapidly settle, and thus, the Fenton-like catalyst can be easily recovered and be repeatedly used many times. The Fenton-like catalyst can be used as a natural peroxidase substitute and used for detection and analysis of H2O2 content in food, biological and environmental samples and for degradation and mineralization of organic pollutants.

Description

technical field [0001] The invention relates to the field of catalysis, in particular to CuFeO with a cuprite structure 2 With Fenton-like catalytic activity, it can efficiently activate hydrogen peroxide and persulfate under near-neutral, room temperature and no external energy conditions, thereby decomposing and mineralizing organic pollutants, and can also be used in Hydrogen peroxide analysis and water pollution treatment. technical background [0002] my country is a water-scarce country. Environmental pollution, especially water pollution, will further reduce available water resources and restrict my country's economic and social development. Common sewage treatment methods include physical, chemical and microbial methods. Physical methods can only realize the transfer of pollutants, but cannot eliminate their environmental hazards. Biological method is the most common sewage treatment method, but its treatment cycle is long, and the treatment effect on industrial ...

Claims

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Application Information

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IPC IPC(8): B01J23/745C01G49/00G01N21/33G01N21/64C02F1/72
Inventor 唐和清丁耀彬朱丽华韩小彦
Owner SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES
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