200 results about "Formaldehyde degradation" patented technology

The invention discloses slow-release immobilized chlorine dioxide particles and a preparation method of the particles. The method comprises the following steps that S1, a surfactant is added to an acid solution, natural zeolite particles are immersed into the acid solution, and then modified natural zeolite particles are obtained through solid-liquid separation; S2, the modified natural zeolite particles are soaked in a transition metal salt solution, and then through solid-liquid separation and calcination, load transition metal zeolite particles are obtained; S3, sodium chlorite powder, silica gel powder and diatomite are mixed according to a proportion, and a covering agent is obtained; S4, the covering agent and the load transition metal zeolite particles are mixed, put into a pelletizer and sprayed with a binding agent, and after covering, pelletizing and drying are conducted, the slow-release immobilized chlorine dioxide particles are obtained; S5, the slow-release immobilized chlorine dioxide particles are placed in a ventilation bag. The slow-release immobilized chlorine dioxide particles release chlorine dioxide gas slowly, the preservation and application period is long,and the particles have the functions such as sterilization and formaldehyde degradation.

The invention discloses a g-C3N4-ZnS composite nanomaterial as well as a preparation method and an application thereof. The particle size of the material is 30-100 nm, and the material contains 5wt%-25wt% of g-C3N4 and the balance of ZnS. The method comprises steps as follows: a Zn source, g-C3N4 nanosheets, a surfactant and an S source are added to aqueous ethanol solution successively, the solution is ultrasonically dispersed and subjected to a hydrothermal reaction and then is separated, washed and dried, and the composite nanomaterial can be obtained. The composite nanomaterial is subjected to ball milling with a curing agent and filler, an inorganic adhesive is added, all materials are stirred uniformly, spray slurry is obtained and sprayed to the surface of a base material at a rateof 0.4-0.6 m / s under 0.45-0.55 MPa, cleaning and air-drying are performed after multi-stage heat treatment, and a g-C3N4-ZnS composite photocatalytic coating is obtained. The preparation technology issimple, and the composite photocatalytic coating prepared with the technology has higher formaldehyde degradation capacity and can be greatly applied to the fields of air purification, sewage treatment and the like.

The invention discloses formaldehyde degradation spray for Chinese herbal components, and belongs to the technical field of air purifying. The formaldehyde degradation spray for the Chinese herbal components comprises wormwood, radix aristolochiae, dogwood, longan, cassia seed, madder, pseudo-ginseng, lithospermum, aloe, seed of Chinese dodder, honeysuckle, eupatorium, dried tangerine or orange peel and fructus forsythia. The formaldehyde degradation spray for the Chinese herbal components not only can effectively degreade formaldehyde in air, but also can enable air to be fresh and fragrant, so that the environment is improved, the fatigue is relieved, physical and mental pleasure further can be realized, the working and learning efficiency is improved, and the use is convenient.

The invention relates to a water-based paint composition and a coating formed by the water-based paint composition. Bases on the total weight of the water-based paint composition, the water-based paint composition comprises, by weight, 20-70% of biologic water-based latex, 20-70% of filler and 0-10% of an additive, wherein the biologic water-based latex contains particles of an acrylic polymer containing formaldehyde degradation functional groups and at least 26wt% of biochar; due to the content of the formaldehyde degradation functional groups, the air formaldehyde purifying efficiency of thecoating formed by the water-based paint composition is 80% or above during the test of JC / T 1074-2008. The water-based paint composition little contains volatile organic compounds.

The invention relates to a formaldehyde degradation experiment chamber, an experimental method and an application for degrading formaldehyde by using a photocatalyst and belongs to the technical field of environmental protection. The formaldehyde degradation experiment chamber comprises an experiment chamber, an air pump, a needle valve and a buffer container; a small-size fan, an exhaust port, a fluorescent tube and a carrier are arranged in the experiment chamber; the air pump is connected with the needle valve, the buffer container, the control valve and the experiment chamber in turn through a pipeline. The experiment chamber has a simple structure and is convenient for an application experiment of degrading formaldehyde by using the photocatalyst. In an airtight space, the initial value of formaldehyde is not above 1.5mg / m<3>, the concentration of the photocatalyst is controlled within 0.1-0.5mg / m<3>, the temperature and humidity in the airtight space are identical to each other, a fluorescent tube is used as a light source for irradiating, the degradation rate of formaldehyde within 2h under the existence of Cu-TiO2 photocatalyst is 57.3%, the degradation rate of formaldehyde within 2h under the existence of SO4-modified Co-TiO2 photocatalyst is 58.7% and the degradation rate of formaldehyde within 2h under the existence of CdxMn1-xS photocatalyst is 57.8%; the degradation rate of formaldehyde within 10h is above 95%; the preparation method for the photocatalyst is simple in process, high in doping efficiency, low in cost and suitable for indoor air treatment.