Nanometer MnO2/PTFE composite material and preparation method and application thereof

Abstract

The invention relates to a MnO2 / PTFE-based air pollutant degradation catalyst as well as a preparation method and application thereof. The MnO2 / PTFE-based air pollutant degradation catalyst is composed of PTFE and a nano material MnO2, and the nano MnO2 is uniformly attached to the PTFE. The preparation method comprises the following steps: (1) standing PTFE in a potassium permanganate solution for 2-6 hours, and conducting draining; (2) conducting aging in a soluble bivalent manganese salt solution for 8-48 hours; and (3) taking out the treated material, conducting washing, conducting drying, and conducting calcining at 180-300 DEG C for 3-6 hours. The method disclosed by the invention is simple and environment-friendly, and the synthesized composite material has a relatively large specific surface area due to the use of PTFE as a carrier, so that the adsorption capacity of the material to gaseous pollutants is improved, and the catalytic degradation capacity of the composite material in a gaseous pollutant removal process is further improved; and the composite material has good flexibility, is easy to recover, and has a wide application prospect in the field of adsorption-catalysis of air pollutant catalysts.

Description

technical field [0001] The invention relates to the field of polymer materials, the field of non-metallic materials, and the field of gas pollutant degradation, specifically a kind of nanometer MnO 2 / PTFE composite material and its preparation method and application. Background technique [0002] In recent years, air pollution has been serious, which has had a huge impact on human life and development. Many large-scale projects are limited to the emission of pollutants and exhaust gases. In fact, human beings are emitting all kinds of polluting exhaust gas all the time, such as automobile exhaust, chemical industry, pharmaceutical industry, household oil fumes, etc., will gradually accumulate and have a qualitative impact and hindrance on human life. If the exhaust gas is not treated, it will cause great harm to the environment. If the exhaust gas directly enters the atmosphere, it will easily cause acid rain, destroy the ozone layer, and aggravate the greenhouse effect an...

AI Technical Summary

Problems solved by technology

But existing MnO 2 The characteristics of the material itself and recycling issues restrict its large-scale commercial production

The main problems are as follows: first, the weight is light, and the mass loss of the catalyst itself is relatively serious under the condition of large space velocity, which leads to unsatisfactory cycle effect; second, the recycling is more complicated, and the pure MnO 2 In the process of powder recycling, a specific recovery device is often required due to the state of the powder, resulting in additional production costs; third, the adsorption effect is poor. In practical applications, it is easy to be difficult to adsorb due to the large gas flow rate, resulting in insufficient catalytic efficiency. Degrades the exhaust gas in a short time, so that the exhaust gas is released into the atmosphere

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