A preparation method of activated carbon-supported catalyst for electrocatalytic degradation of organic wastewater

Abstract

The invention relates to a method for preparing an activated carbon-supported catalyst for electrocatalytic degradation of organic wastewater, and belongs to the technical field of catalyst preparation. The present invention prepares activated carbon solids containing multiple active metals through the sol-gel method, and then adds P2O5 powder to the activated carbon solids containing active metals for roasting. The P2O5 powder sublimates into gas at high temperature, and the gas expands and escapes under high temperature conditions. When it comes out, many small pores will be generated in the activated carbon, which increases the specific surface area and adsorption capacity of the activated carbon. The present invention uses rare earth metals in conjunction with other active metals to make the surface particles of the catalyst uniform and refined. At the same time, combined with the method of adding P2O5 powder for roasting, the catalytic efficiency of the prepared activated carbon-loaded catalyst can be increased by 5% to 15%. above. The method of the invention has simple process, convenient operation and low cost, and the prepared catalyst does not need to add other oxidants in the process of electrocatalytically degrading organic wastewater, which is beneficial to large-scale industrial application.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and relates to a preparation method of an activated carbon-supported catalyst, in particular to a preparation method of an activated carbon-supported catalyst used for electrocatalytically degrading organic wastewater. Background technique [0002] Due to the rapid development of modern industry, coking, oil refining, papermaking, plastics, ceramics, textiles and other processes, as well as production processes such as petroleum cracking to ethylene, synthetic phenol, polyamide fiber, organic pesticides and phenolic resins, etc., produce a large amount of phenolic organic pollutant wastewater . Phenol and its derivatives (such as cresol, xylenol, and nitrocresol) in wastewater are all aromatic compounds, which are very toxic to organisms in water bodies, and are difficult to degrade, which can easily cause serious damage to water bodies. Pollution, solving the problem of phenol-cont...

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Problems solved by technology

However, the preparation process of this patent is complex and requires high production equipment. It is necessary to use hydrogen-nitrogen mixed gas to reduce the activated carbon, and this patent also needs to impregnate the reduced activated carbon with a barium-containing solution before impregnating a potassium-containing solution, which is easy to cause The dissolution of the barium ions impregnated for the first time in the second potassium solution not only contaminates the second potassium solution, but also causes a large difference between the actual load of metal ions and the theoretical amount. In addition, if the used impregnating solution is poured directly The discharge will inevitably cause environmental pollution, and if post-treatment is carried out, the production cost of the catalyst will be increased accordingly

In addition, the above two invention patents mainly rely on the carrier activated carbon to adsorb the catalyst ions in the wastewater in the process of using the catalyst to degrade the organic wastewater. However, the adsorption capacity of the activated carbon is limited and it is easy to be saturated, so it is difficult to completely adsorb the catalyst ions to the activated carbon. Therefore, these catalysts are not only used in a large amount in the treatment of wastewater, but also have low effectiveness. These factors limit the large-scale application of these catalysts in actual wastewater treatment.

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