Efficient ecotype inorganic formaldehyde adsorbing material and preparation method thereof

Abstract

The invention relates to an efficient ecotype inorganic formaldehyde adsorbing material which is obtained by mixing and curing 50%-75% of a solid raw material containing aluminosilicate, 10-40% of alkaline solution and 10%-15% of a complex reaction activator, wherein the solid raw material containing the aluminosilicate comprises at least one of the following raw materials: clay, kaolin, coal gangue, fly ash, waste incineration ash, slag, red mud and the like; alkali content of the alkaline solution is 3-12mol / L[OH-]; and the complex reaction activator comprises two components at mass ratio of 75-85% of a silicate substance and 15-25% of Al2O3 particle size of which is more than 1000 meshes. The inorganic adsorbing material is of a net porous gel structure, total pore volume is 0.17mL / g-0.36mL / g, specific surface area is 300-650m<2> / g, and pore distribution mainly adopt two modes of micropores (pore diameter is less than 2nm) and mesopores (pore diameter is 2-50nm), wherein the pore volume of the micropores (45%-60%) and the mesopores (25%-50%) accounts for 85%-95% of the total pore volume. The inorganic adsorbing material comprises 80-95% of an amorphous component and 5-20% of a crystal component based on the total mass of the material.

Description

technical field [0001] The invention relates to an inorganic adsorption material that can be used for indoor air purification, in particular to an inorganic adsorption material with the function of removing aldehydes and a preparation method thereof. Background technique [0002] With the continuous heating up of interior decoration and the wide application of various building materials, the resulting indoor air pollution has attracted more and more attention. Among them, the main pollutants are from paint, plywood, particle board, interior wall paint, plastic Formaldehyde, benzene, VOCs (Volatile Organic Compounds) and other volatile organic compounds in veneers and other materials. At present, formaldehyde is the main pollutant in newly decorated homes in my country, and has been identified as a class I carcinogen by the World Health Organization. The modern scientific research shows: formaldehyde mainly shows aspects such as allotriosmia, stimulation, allergy, abnormal p...

AI Technical Summary

Problems solved by technology

At present, solid adsorbents based on various types of activated carbon and its products have unsatisfactory adsorption effects, mainly because activated carbon is composed of non-polar molecules; by adjusting raw materials and preparation processes, activated carbon can be enriched with carboxyl, phenol, carbonyl, etc. The acidic functional group makes the activated carbon have a certain polarity. However, compared with the adsorption performance of polar adsorption materials, the adsorption capacity of this modified activated carbon for small molecules such as formaldehyde and substances with acidic properties is still very limited.