Supported advanced oxidation catalyst material and preparation method thereof

Abstract

The invention belongs to the field of catalyst materials for waste water treatment, and provides a supported advanced oxidation catalyst material and a preparation method thereof. The method includes the steps: (1) pre-treating carrier materials; (2) placing the pretreated carrier materials into plating solution with a pH (potential of hydrogen) value of 3-13, stirring mixture for at least 5 minutes at the temperature ranging from 30 DEG C to 90 DEG C, performing solid-liquid separation, cleaning a solid phase by the aid of water and organic solvents, and drying the cleaned solid phase to chemically-plated carrier materials; (3) aerobically roasting the chemically-plated carrier materials for 1-8 hours at the temperature ranging from 200 DEG C to 1000 DEG C to obtain the catalyst material. According to the catalyst material, metal oxides are uniformly loaded on the surfaces of the carrier materials, binding force among the loaded metal oxides and the carrier materials can be effectively improved, loading capacity is improved, the service life of the catalyst material is prolonged, catalytic activity is improved, and secondary pollution caused by metal ion leaching is effectively relieved.

Description

technical field [0001] The invention belongs to the field of catalytic materials for wastewater treatment, and in particular relates to a loaded advanced oxidation catalytic material and a preparation method thereof. Background technique [0002] Water pollution has become an increasingly serious problem that endangers human health and the natural environment. Effective treatment of wastewater can curb water pollution from the source. Advanced oxidation technologies such as ozone oxidation, persulfate oxidation, Fenton oxidation, photochemical oxidation, and electrochemical oxidation, as wastewater pretreatment and advanced treatment technologies, have been widely used to degrade toxic and refractory pollutants in wastewater, reduce the toxicity of wastewater, and improve the quality of wastewater. biodegradability. [0003] Advanced oxidation technology mainly uses catalysts to catalyze the decomposition of oxidants such as hydrogen peroxide, persulfate, and ozone to gene...

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Problems solved by technology

This "impregnation + roasting" preparation method and the prepared catalytic material have the following disadvantages: (1) the metal oxide loaded on the surface of the carrier material exists in the form of large particles, which is not dense enough, and the binding force with the carrier material is also weak, In the process of wastewater treatment, due to the stirring and shearing force, metal oxides are easy to fall off, and metal ions are prone to leaching in an acidic environment, which will easily lead to a decrease in catalytic performance and a shortened service life of the catalyst. Metal ion leaching will also cause secondary pollution. secondary pollution, which is not conducive to the engineering application of catalytic materials; (2) metal oxides in the form of large particles are discretely distributed on the surface of carrier materials, the loading capacity is limited and unevenly distributed, and the catalytic activity needs to be improved; (3) impregnation method Only by ion exchange or adsorption to transfer metal ions to the surface of the carrier material, it is difficult to accurately control the loading amount of catalytic metal on the surface of the carrier material; (4) when using the impregnation method to load multiple metal ions, the same metal ions are often easy to aggregate Together, it is difficult for various metal ions to be evenly distributed on the surface of the carrier material. After calcination, various individual metal oxides are still formed on the surface of the carrier material, and it is difficult to form multiple composite metal oxides.

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