Nanometer manganese catalyst for room-temperature catalytic oxidation of formaldehyde and preparation method thereof

Abstract

The invention provides a nanometer manganese catalyst for room-temperature catalytic oxidation of formaldehyde and a preparation method thereof. The nanometer manganese catalyst comprises an oxide carrier and an active component MnO2 which is loaded on the oxide carrier. The oxide carrier accounts for 0-85 % of mass of the nanometer manganese catalyst; the active component MnO2 accounts for 15-100% of mass of the nanometer manganese catalyst; and a surfactant accounts for 0-15% of mass of the nanometer manganese catalyst. By the use of the catalyst, formaldehyde can be completely oxidized intocarbon dioxide and water under the condition of room temperature. The catalyst has high catalytic efficiency, good stability and long service life. After 120 h of the reaction, formaldehyde removal rate is still maintained at 82% and above, and there is no secondary pollution. There is no need to provide light source, heat source, complex equipment and external conditions. The preparation methodis low-cost, has a simple and feasible production process, and has a wide application prospect.

Description

technical field [0001] The present invention relates to a kind of nano-catalyst, more specifically, relate to a kind of nano-manganese catalyst used for catalytic oxidation of formaldehyde at room temperature. carbon dioxide and water. Background technique [0002] Formaldehyde (HCHO) is one of the most serious pollutants. It has a wide range of sources, long-term pollution, and strong toxicity. After entering the human body through the respiratory tract and skin, it will cause teratogenic, carcinogenic, and mutagenic effects on the human respiratory system, liver system, and organs. other permanent damage. According to statistics, within 1 to 6 months after decoration, the rate of formaldehyde exceeding the standard reaches 80%, and the rate of meeting rooms and offices is close to 100%. After 3 years of decoration, the rate of exceeding the standard is still above 50%. People spend more than 70% of their time in life and work, and the quality of the environment is very i...

AI Technical Summary

Problems solved by technology

Chinese invention patent CN 103894194 A discloses a supported catalyst for removing formaldehyde at room temperature. The catalyst uses nano-rod ceria with exposed crystal planes {220} and {200} planes as the carrier, and precious metal gold as the active component. After drying, calcining, and grinding, a supported catalyst is obtained, which can quickly oxidize formaldehyde into carbon dioxide and water, but the catalyst has disadvantages such as expensive active component gold, complicated catalyst preparation process, and not suitable for large-scale production; China Invention patent CN105854592 A discloses a material for purifying air and its preparation method and application. The material uses aluminum or aluminum alloy as the base material to support manganese oxide with birnessite structure, which can quickly decompose formaldehyde or ozone in the air at room temperature. , but this method has problems such as the degradation rate of formaldehyde is lower than 80% at room temperature, the catalytic material has a short service life, and poor stability.

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