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Novel method for removing indoor formaldehyde by nano manganese dioxide

A nano-manganese dioxide, a new method of technology, applied in the removal of indoor formaldehyde gas pollution, the use of non-photocatalyst MnO2 to absorb formaldehyde field, can solve the problem of excessive formaldehyde content, to achieve indoor air health, remove formaldehyde pollutants, indoor air more effect

Inactive Publication Date: 2017-06-20
TIANJIN CITY CENTSTAGE TECH INCUBATOR COMPANY
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of excessive formaldehyde content in existing decoration materials and new combined furniture, provide a method and practical material that can effectively solve indoor formaldehyde pollution, and remove indoor formaldehyde gas pollution simply and efficiently

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  • Novel method for removing indoor formaldehyde by nano manganese dioxide

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Embodiment Construction

[0010] The new method of removing indoor formaldehyde by nano manganese dioxide of the present invention uses KMnO 4 with MnSO 4 Synthesis of MnO at room temperature 2 , and doped with other metal ions to obtain nanocapsular MnO doped with different metals 2 sphere. Doping metal ions to prepare manganese dioxide powder steps: take a small amount of silver nitrate and 7.0gKMnO 4 solution mixed, a trace of copper sulfate or zinc sulfate and 10.0gMnSO 4 .H 2 O solutions were mixed to prepare 200ml solutions respectively, and then the MnSO 4 The solution was placed on a magnetic stirrer, and the above KMnO was added dropwise under rapid stirring. 4 Solution, the resulting precipitate was washed with distilled water and absolute ethanol, and vacuum filtered repeatedly until the filtrate was colorless, placed in a drying oven, and dried at 100°C for 12 hours to obtain MnO 2 powder.

[0011] MnO 2 BET specific surface analysis

[0012] Table 1 Physicochemical parameters of ...

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Abstract

The invention relates to a novel method for removing indoor formaldehyde by nano manganese dioxide. The method comprises the following steps: KMnO4 and MnSO4 are subjected to synthesis to obtain MnO2 at normal temperature, other metal ions are doped, and different metals-doped nanocapsule MnO2 spheres can be obtained. From the research result, the metal-supported nano MnO2 has a following sequence for oxidizing catalytic activity of formaldehyde under low temperature: Ag / MnO2 is greater than Cu / MnO2, Cu / MnO2 is greater than Zn / MnO2. A catalyst is composed for minimal rod-shaped object with average diameter of 40 nm. When the other metal is supported, the catalytic activity of the catalyst is greatly increased by comparing with pure MnO2. The supported metal is existed as simple substance and ion forms. The reason of increase of the catalyst activity is that when metal and MnO2 are combined, strong mutual effect is generated. Passing of oxygen in air through MnO2 to an active site is easier, so that formaldehyde oxidation under low temperature can be easier.

Description

technical field [0001] The invention relates to a method for removing indoor formaldehyde gas pollution, in particular, a method using a 2 The method for adsorbing formaldehyde belongs to the field of environmental protection. Background technique [0002] Formaldehyde (HCHO) is a colorless and soluble irritating gas. Formaldehyde can be absorbed through the respiratory tract, and its aqueous solution "formalin" can be absorbed through the digestive tract. Formaldehyde has strong carcinogenic and short cancer effects. The lot of documents record, formaldehyde mainly shows aspects such as allotriosmia, stimulation, allergy, abnormal pulmonary function, dysfunction of liver and immunologic dysfunction to health effects. When the concentration is too high, it can cause nausea and vomiting, cough, chest tightness, asthma and even pulmonary edema; up to 30mg / m 3 , it can cause immediate death. In 2004, the International Agency for Research on Cancer (IARC) raised formaldehyde...

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Application Information

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IPC IPC(8): B01D53/86B01D53/72B01J23/68B01J23/84B01J23/34B01J35/08B01J35/10B82Y40/00
CPCB01D53/72B01D53/8668B82Y40/00B01J23/34B01J23/688B01J23/84B01D53/88B01D2259/4508B01J35/51B01J35/613
Inventor 王振华
Owner TIANJIN CITY CENTSTAGE TECH INCUBATOR COMPANY
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