Chlorine-doped catalyst and preparation method and application thereof

Abstract

The invention discloses a chlorine-doped catalyst and a preparation method and application thereof, and belongs to the technical field of catalyst preparation. The preparation method of the chlorine-doped catalyst comprises the following steps: carrying out primary roasting on an anodized aluminum base material, then carrying out a hot hydration reaction, and then carrying out secondary roasting to obtain a metal-based carrier; the metal-based carrier is subjected to chlorine doping modification, iron compound loading, noble metal loading and reduction to obtain the chlorine-doped catalyst. The prepared catalyst is stable in property, the contained precious metal Pd can generate hydrogen peroxide on line, Fe can further convert the hydrogen peroxide into hydroxyl free radicals with strong oxidizing property, and the doped chlorine element can inhibit side reactions of the hydrogen peroxide in the synthesis process and hydrogenation / decomposition side reactions generated after hydrogen peroxide synthesis. Therefore, the generation amount of hydrogen peroxide is further increased, and the purposes of improving the effect of the electro-Fenton reaction and the degradation rate of pollutants are achieved.

Description

technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a chlorine-doped catalyst and its preparation method and application. Background technique [0002] In wastewater, printing and dyeing wastewater has the characteristics of high chroma, low biodegradability, and complex composition, which is difficult to treat. And with the development of printing and dyeing technology, the refractory substances in printing and dyeing wastewater are increasing, and the traditional wastewater treatment process and equipment of early sewage plants can no longer meet the increasingly stringent standards. How to develop efficient and widely used wastewater treatment methods has become a problem that cannot be ignored. [0003] At present, the main methods for treating printing and dyeing wastewater include physical methods (such as adsorption, extraction, membrane separation, etc.), chemical methods (such as electrochemical, chemical co...

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Problems solved by technology

Compared with the traditional chemical Fenton, these two catalysts have greatly reduced the process cost, improved the reaction efficiency and the utilization rate of raw materials, but still need to add iron salt or hydrogen peroxide in the reaction, and there is a large amount of catalyst , the disadvantage of not being easy to recycle

[0005] Although there are many types of catalysts for wastewater treatment, most of them are granular or powdery, which is not conducive to the recovery of catalysts, and the addition of iron ions promotes the catalytic reaction, which inevitably dissolves a large amount of iron ions, causing certain pollution. Precious metal catalysts are used Although the catalytic effect is very good, the price is expensive, and the preparation process of some catalysts is relatively complicated, and it is difficult to industrialize production. However, how to prepare a catalyst that is easy to recycle, low in price and high in catalytic efficiency and simplify the preparation method has become an urgent need for those skilled in the art. problem solved

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