A preparation method of catalyst crystal and its application in catalytic degradation of organic wastewater

Abstract

The invention belongs to the technical field of organic catalysis, and particularly relates to a preparation method of catalyst crystal and application of the catalyst crystal in catalytic degradation of organic wastewater, particularly, in catalytic degradation of 2,4-dichlorophenol. According to the preparation method, ammonium paramolybdate is adopted as a molybdenum source, melamine is adopted as a nitrogen source, ferric rhodanide is adopted as a sulfur source and an iron source to modify titanium dioxide, and brown catalyst crystal is prepared through in-situ reaction. A relatively high specific surface and catalytic activity are achieved, and the degradation rate for the 2,4-dichlorophenol is as high as 99% or greater.

Description

technical field [0001] The invention belongs to the technical field of organic catalysis, and in particular relates to a preparation method of a catalyst crystal and its application in catalytic degradation of organic wastewater, in particular to catalytic degradation of 2,4-dichlorophenol. Background technique [0002] 2,4-dichlorophenol (2,4-dichlorophenol) is an important organic intermediate, mainly used in chemical industry, insecticide, preservative and paper industry. It has a foul smell and a high degree of toxicity. It is an environmental hormone and can accumulate in animals through the food chain. These pollutants are some organic substances that are difficult to be biodegraded. They not only hinder the growth and reproduction of aquatic organisms, but are also harmful to human health. Toxic pollutants on blacklist. Therefore, it is of great practical significance to control and remove low-concentration and highly toxic pollutants in the environment. Photocatal...

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Problems solved by technology

[0006] The purpose of the present invention overcomes the shortcomings of low catalytic efficiency and high catalyst cost in the catalytic degradation of 2,4-dichlorophenol in the prior art, and provides a method for preparing a catalyst crystal, which is used to catalyze the degradation of 2,4-dichlorophenol; In the present invention, ammonium paramolybdate is used as molybdenum source, melamine is used as nitrogen source, ferric thiocyanate is used as sulfur source and iron source to modify titanium dioxide, and brown catalyst crystals are prepared through in-situ reaction, which has a relatively high specific surface area. and catalytic activity

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