Catalyst for quickly degrading formaldehyde in air at room temperature and method for preparing catalyst

Abstract

The invention discloses a catalyst for quickly degrading formaldehyde in air at the room temperature. The catalyst comprises metal compounds and adsorption carriers for loading the metal compounds. Precious metal components are loaded on the metal compounds. The catalyst has the advantages that metal oxide is loaded on inexpensive adsorption materials such as zeolite, effects of adsorbing and enriching gas can be sufficiently realized by the adsorption materials, effects of quickly catalytically oxidizing the formaldehyde can be realized by oxide groups in the presence of molecular electrostatic fields, and effects of reducing the catalytic reaction temperatures can be realized by precious metal; the precious metal components are low in content, accordingly, the problems of high cost and quick room-temperature degradation of precious metal catalysts in the prior art can be solved by the aid of the catalyst, and the formaldehyde can be quickly oxidized into carbon dioxide and water at the room temperature by the catalyst; the low content of the precious metal components can reach 0.019-0.031% and is far lower than the contents of precious metal components in existing catalysts.

Description

technical field [0001] The invention relates to a catalyst for rapidly degrading formaldehyde in air at room temperature and a preparation method thereof. Background technique [0002] With the rapid growth of my country's economy and the rapid improvement of people's living consumption levels, urban construction has entered a period of rapid development, and consumers have put forward higher requirements for living and working environments. However, most of the building materials, furniture products and decoration materials used in living rooms and office buildings contain excessive or seriously excessive substances that are extremely harmful to human health. These gradually released pollutants cannot be effectively decomposed, making indoor pollution quite serious. [0003] According to the Environmental Monitoring Center of China Interior Decoration Association, the number of deaths caused by indoor air pollution in China has reached 110,000 people every year! In recent ...

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Problems solved by technology

However, due to the adsorption balance of activated carbon, when the adsorption is saturated, formaldehyde desorption will occur, resulting in secondary pollution; photocatalytic decomposition of pollutants technology is currently a more researched indoor air purification technology, and has achieved good indoor air purification effects. Such as the nano-solid superacid photocatalyst that has obtained the national invention patent (ZL98115808.0), but this type of catalyst mainly uses TiO2 nano-powder or coated film as the photocatalyst, the raw material preparation method is complicated, the process technology requirements are high, and This method needs to cooperate with ultraviolet lamps to play a role. In addition to being large in size, it will also produce secondary pollutants such as ozone.

[0007] The strong oxidation method mostly uses strong oxidants such as hypochlorous acid and peracetic acid to be sprayed indoors, and the efficiency is extremely high in the short term. However, because formaldehyde is in a state of continuous volatilization, it will return to a higher concentration after a period of time, and The above strong oxidants cannot be used in an environment with people, and can only be used for short-term treatment when the decoration is indoors and there is no one.

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