Preparation method and application of three-dimensional Fe-Mo-S catalyst loaded porous carbon electrode

Abstract

The invention belongs to the technical field of electro-Fenton cathode material synthesis and electro-Fenton water treatment. A preparation method of a three-dimensional Fe-Mo-S catalyst loaded porous carbon electrode is characterized by comprising the following steps: S1, firstly, soaking clean carbon fiber felt in concentrated nitric acid, and then cleaning the carbon fiber felt to be neutral; S2, weighing 0.3475 to 1.0425 g of FeSO4. 7H2O, 0.3024 to 0.9072 g of Na2MoO4. 2H2O and 1.5993 to 4.7979 g of L-Cys amino acid , adding water, dissolving the materials in an inner container of a reaction kettle, carrying out ultrasonic treatment and stirring, and fixing the volume to 200 mL; S3, putting a cleaned carbon fiber felt; S4, putting the reaction kettle into an electric heating blast drying oven for synthesis; and S5, cleaning and drying to obtain a product. The Fe-Mo-S catalyst is loaded on the carbon fiber felt through a hydrothermal method, hydroxyl radicals are efficiently generated, then organic pollutants in sewage are oxidized and degraded, and the catalytic effect is remarkable; and the related preparation process is simple, and the material price is relatively low.

Description

Technical field [0001] The present invention belongs to the synthesis of the electropon cathode material and the technical field of electrostat water treatment, and in particular, the method of preparing a three-dimensional Fe-Mo-S catalyst load and its application in photoconduction water treatment apparatus. Background technique [0002] Carbon fiber felt (porous carbon) is a felt-shaped porous material made of high polymer high-temperature carbonization, its raw material is rich, cheap, easy to produce, loose porous, large surface area and has good chemical stability and conductivity. Therefore, it can be used as an ideal carrier of the catalyst. Have a hole structure results in a catalytic active edge site having more exposure. [0003] The rate of redox reactions determine the product's work efficiency, and the reaction rate is determined by the catalyst. Since the oxidation reaction (ORR) of the cathode is much larger than the oxidation reaction of the anode, the electrode ...

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Problems solved by technology

[0006] However, the current electric Fenton technology consumes a lot of power in practical applications, resulting in high operating costs; the traditional iron electrode is not effective as a catalytic electrode, and the anode iron plate will corrode and dissolve iron ions during operation. Regular replacement, and the dissolved iron ions will produce a large amount of iron sludge waste, because the iron sludge contains a large amount of toxic substances, it must be treated as hazardous waste, and the treatment cost is extremely high; however, in the traditional Fenton method, due to the need to add H 2 o 2 and Fe 2+ , thereby increasing the cost, a large amount of iron hydroxide sludge by-products that need secondary treatment will be produced during the reaction, and the Fe added at the beginning of the reaction 2+ will convert to Fe 3+ , to slow down the reaction rate

In addition, the traditional flat electrode has a small specific surface area, and the treatment effect is poor, especially when the wastewater conductivity is low.

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