Catalytic material for degrading indoor formaldehyde in room temperature and preparation method thereof

Abstract

The invention provides a catalytic material for degrading indoor formaldehyde in a room temperature and a preparation method thereof. The catalytic material can be an active component of a pure active component MnO2, or comprises a molecular sieve carrier material. The active component MnO2 is generated by divalent manganese salt solution and alkali solution through an acid base titration reaction. The active component MnO2 is in-situ loaded on the molecular sieve carrier material. The preparation process of the catalytic material is simple, the operation is convenient, and the price of the catalytic material is cheap. A specific light source and additional electric power and heating power do not need to be provided in the preparation process, and the energy is saved. The catalytic material can be effectively used for degrading the indoor formaldehyde in the room temperature condition, and converting the formaldehyde into harmless carbon dioxide and water, wherein the formaldehyde conversion percent within 100 h is more than 90%.

Description

technical field [0001] The invention relates to a catalytic material, in particular to a catalytic material for degrading indoor formaldehyde at room temperature and a preparation method thereof, belonging to the technical field of adsorbents. Background technique [0002] my country is facing severe air pollution, and indoor air quality continues to deteriorate. People spend more than 80% of their time in the indoor environment every day, and air intake accounts for more than 75% of the total intake of the human body. Formaldehyde is one of the main indoor pollutants and one of the carcinogens recognized by the World Health Organization. Long-term exposure to formaldehyde in an environment exceeding the standard is very harmful to the human body. According to the survey of relevant international organizations, nearly 3 million people die directly or indirectly from decoration pollution all over the world every year. Recently, the General Administration of Quality Supervis...

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Problems solved by technology

Chinese invention patent CN105879908A discloses a formaldehyde oxidation catalyst at room temperature. The catalyst uses tetrabutyl titanate and a porous material modified by a silane coupling agent as a carrier, and supports Ag with a core-grain structure. x -Pd nanomaterials, separated by suction filtration, dried, heated to 350°C for at least 2 hours under a hydrogen atmosphere, and then used with a volume ratio of 1% O 2 / N 2 The mixed gas is purged for at least 2 hours to obtain a supported catalyst. The formaldehyde degradation rate of the catalyst can reach 76.4% at room temperature. Low degradation rate, not suitable for large-scale production and other shortcomings; Chinese invention patent CN 105435740 A discloses a preparation method of activated carbon formaldehyde adsorbent loaded with manganese dioxide, using potassium permanganate to carbon-etch the surface of activated carbon to realize Activated carbon regenerates pores, adjusts the pore structure and pore size on the surface of activated carbon, and improves the adsorption capacity of formaldehyde. The amount of formaldehyde adsorbed per gram of product can reach 195mg / g after being modified by loading manganese dioxide, but this method cannot completely eliminate formaldehyde. The energy consumption of the agent modification process is large, the adsorbent is easily saturated, and the service life is short

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