Renewable high-efficiency formaldehyde removal material and preparation method thereof

Abstract

The invention relates to a renewable high-efficiency formaldehyde removal material and a preparation method thereof. The preparation method comprises the following steps of mixing tetramethylammonium hydroxide with a H2O2 solution to make a solution A; dissolving manganese chloride tetrahydrate in ultrapure water to make a solution B; dropwise adding the solution A into the solution B, then ultrasonically dispersing, and agitating to obtain nigger-brown ultrathin MnO2 nanosheet colloidal turbid liquid; dissolving alkaline sepiolite and nano molybdenum carbide in a solution of ethanol and water, dropwise adding the ultrathin MnO2 nanosheet colloidal turbid liquid, centrifugally separating reaction liquid, and drying, so that the high-efficiency formaldehyde removal material loaded with an ultrathin MnO2 nanosheet is obtained. The reaction, of the renewable high-efficiency formaldehyde removal material, of catalytically oxidizing formaldehyde can be carried out at room temperature, is excellent in recycling performance, is an environment-friendly and nontoxic powdery catalyst, can be used for effectively removing the formaldehyde released from various house furnishing materials and free formaldehyde in air, and is thoroughly free from secondary pollution; thus, obsession and threat which are brought by the formaldehyde in a living environment to the normal life of people are guaranteed to remove.

Description

technical field [0001] The invention belongs to the technical field of formaldehyde catalysis, and in particular relates to a renewable high-efficiency formaldehyde removal material and a preparation method thereof. Background technique [0002] Formaldehyde is one of the most serious indoor pollutants, ranking second on my country's priority list of toxic chemicals, and has been identified as a carcinogenic and teratogenic substance by the World Health Organization. Formaldehyde can combine with the amino group in human protein to denature the protein and cause harm to the human body. Formaldehyde can harm the human body in many ways, and high-concentration formaldehyde is also toxic to the nervous system, immune system, and liver. Studies have shown that the problem of excessive free formaldehyde in wood-based panels is still quite serious. The emission of free formaldehyde in wood-based panels is one of the important sources of formaldehyde pollution in indoor air. The...

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Problems solved by technology

Although free formaldehyde in the air can be adsorbed, desorption will occur after the adsorption is saturated, and it does not have the characteristics of long-term cure

Some formaldehyde scavengers have good scavenging effects, such as CN 102500224 A, etc. They have prepared formaldehyde scavengers in the form of adsorption materials combined with oxidizing agents or reducing agents. Although formaldehyde pollution can be eliminated, other chemical substances produced after the reaction are likely to cause Secondary pollution of the environment

Although some formaldehyde scavengers use natural extracts (such as pineapple essential oil, jasmine essential oil, etc.) such as CN 103447006 A, the extraction process of the natural extracts is relatively complicated, and the ability to capture free formaldehyde in the air is insufficient

In the research of photocatalytic water splitting to produce hydrogen, some scholars put WO 3 、TiO 2 As the main materials, good results have been achieved, but related materials mainly respond in the ultraviolet region, which limits the reaction efficiency of materials in the application process.

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