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Preparation method and application of a kind of fenton catalyst

A catalyst and a type of technology, applied in the field of preparation of Fenton-like catalysts, can solve the problems of easy formation of iron sludge, insufficient pH application range, low catalytic degradation efficiency, etc., and achieve low cost, good catalytic degradation performance and good catalytic effect. Effect

Active Publication Date: 2017-12-22
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems of organic waste water pollution, low catalytic degradation efficiency of heterogeneous Fenton catalysts, insufficient range of pH application, and easy formation of iron sludge, etc., breaks through the traditional concept, and provides a non-ferrous ion-free catalyst with good catalytic effect. , a preparation method of a Fenton-like catalyst for catalytic degradation of methyl orange with a wide pH range, easy recovery and environmental friendliness

Method used

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  • Preparation method and application of a kind of fenton catalyst
  • Preparation method and application of a kind of fenton catalyst
  • Preparation method and application of a kind of fenton catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 0.025mol of Co(NO 3 ) 2 ·6H 2 O and 0.01mol Cu(NO 3 ) 2 ·3H 2 O was dissolved in 15mL of water, and 60mL of NaOH solution with a concentration of 3.3mol / L was added dropwise to the mixed solution of cobalt nitrate and copper nitrate, while stirring continuously, the obtained solution was ultrasonicated for 10min, then stirred for 10min, and 1mL of propionaldehyde was added Finally, pour the solution into a 100mL reaction kettle, seal it and place the reaction kettle in an oven at 180°C for 48 hours of reaction. Put it in a vacuum drying oven for 24 hours, and finally grind it.

[0031] figure 1 and figure 2 It is a scanning and projection photo of the sample. It can be seen from the figure that the sample presents an irregular hexagonal sheet structure, with particle sizes ranging from 0.5 μm to 5 μm. The surface of the particles is smooth and there are gaps between them.

[0032] image 3 is the XRD diffraction pattern of the sample, from which the stan...

Embodiment 2

[0035] Take 100mL of methyl orange simulated wastewater with a concentration of 200mg / L and an Erlenmeyer flask, adjust the pH to 2, add 0.2g of the Fenton-like catalyst prepared in Example 1, and then ultrasonically or vibrate for 30min to complete the adsorption, and then add Immediately put 4mL of hydrogen peroxide into a constant temperature oscillator with a temperature of 40°C, count this time as the start time of the reaction, take a sample after reacting for 50 minutes, and measure the degradation rate of methyl orange to be 95.58% after measuring COD.

Embodiment 3

[0037] Take 100mL concentration of 50mg / L methyl orange simulated wastewater and Erlenmeyer flask, adjust the pH to 7, add 0.05g of the Fenton-like catalyst prepared in Example 1, then ultrasonic or shake for 30min to make it complete the adsorption, then add Immediately put 2mL of hydrogen peroxide into a constant temperature oscillator at 40°C, count this time as the start time of the reaction, take a sample after 50 minutes of reaction, and measure the degradation rate of methyl orange as 93.74% after measuring COD.

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Abstract

The invention provides a preparation method and application of a Fenton-like catalyst. The method comprises the steps that cobalt nitrate and cupric nitrate mixed liquid A is prepared; a sodium hydroxide solution is added to the mixed liquid A to obtain mixed liquid B; a surface active agent is added to the mixed liquid B to obtain mixed liquid C; the mixed liquid C is subjected to a constant-temperature hydrothermal reaction; products obtained after the hydrothermal reaction are subjected to suction filtration, washing and vacuum drying. The prepared Fenton-like catalyst only contains two metallic elements, namely, cobalt and copper, the advantage that transition metal can improve the catalytic performance of the catalyst is fully utilized, and the advantage that cobalt and copper can widen the pH range is also utilized, so that the prepared catalyst is good in catalytic degradation performance and high in stability, and the catalyst has good catalytic performance when the pH ranges from 2 to 10.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation for wastewater treatment, and in particular relates to a preparation method and application of a Fenton-like catalyst. The Fenton-like reagent prepared by the method can be used to catalyze and degrade methyl orange. Background technique [0002] Advanced oxidation is an important emerging method in the water treatment process, which can directly mineralize pollutants into non-toxic CO2, H2O and trace inorganic salts, or improve the biodegradability of pollutants. Among them, the heterogeneous Fenton method has received more and more attention because of its fast reaction rate, mild reaction conditions, simple operation, relatively low operating cost, and the catalyst exists in a solid state, which is easy to separate and can be recycled. However, the current heterogeneous Fenton method still has the disadvantages of low catalytic degradation efficiency, narrow pH range, and easy form...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75C02F1/72C02F101/34C02F101/38
Inventor 张波陈闪闪许小红吴春笃徐汉
Owner JIANGSU UNIV