A system for airflow control includes at least two apparatus. The apparatus configures to create the required airflow to direct, remove and deactivate pathogenic aerosols in the air by working together. The apparatus can equip with low power fan.

Disclosed is a method for manufacturing a photocatalytic filter for air purification. The present manufacturing method comprises the steps of: oxidizing a titanium metal to obtain a nanostructured titanium dioxide (TiO2); adding the nanostructured titanium dioxide to an acidic fluorine-containing solution to allow a reaction to occur therebetween for a predetermined period of time; and, after treatment in the acidic fluorine-containing solution, performing heat treatment on the nanostructured titanium dioxide.

The invention discloses a phosphorus-doped tubular carbon nitride micro-nano material and application thereof in waste gas treatment. Melamine is partially hydrolyzed into cyanuric acid through a phosphorous acid-assisted hydrothermal method to form a melamine-cyanuric acid super molecular precursor; the center of the precursor starts to be pyrolyzed under heating calcination, and thus phosphorus-doped tubular carbon nitride is obtained; the phosphorus-doped tubular carbon nitride and sodium borohydride are mixed and subjected to low-temperature calcination in an inert gas atmosphere, and defect-modified phosphorus-doped tubular carbon nitride is obtained. The defect-modified phosphorus-doped tubular carbon nitride micro-nano material has a good photocatalytic effect on catalytic degradation of waste gas; besides, the production raw materials are abundant and easy to obtain, and the phosphorus-doped tubular carbon nitride micro-nano material is good in stability and recyclable and has application prospects in waste gas treatment.

A system for the treatment of microorganisms includes: a textile web having optical fibers in warp and/or weft woven with binding threads in warp and/or weft, each of the optical fibers having invasive alterations along the fiber and allowing the emission of light propagating in the fiber at these alterations; a light source arranged opposite one or both free ends of the optical fibers. The textile web includes metallic warp and/or weft threads woven with the binding threads, the metallic threads being based on a metal having a negative effect on the growth of microorganisms. The light source generates a light beam having at least one wavelength in the visible or ultraviolet spectrum.

The present invention relates to a filter medium (10) for air and/or water cleaning, comprising a semiconductor photocatalytic material (14) and a light energy source (15) for radiating light provided to activate photocatalytic reactions of the semiconductor photocatalytic material (14). The light energy source (15) is configured as a support (16) for the semiconductor photocatalytic material (14). The filter medium (10) can be incorporated into a filter unit (100).

The present disclosure relates to a method for manufacturing an air filtration material, in which the porous metallic support is treated with at least one chemical agent to improve adherence of the electrospun nanofibers. The air filtration material obtained from such method comprises nanoparticle photocatalysts, wherein the nanoparticle photocatalysts are embedded in the electrospun nanofibers and part of the nanoparticle photocatalysts is exposed at the surface of the electrospun nanofibers through nanopores. An air filtration device, comprising the air filtration material, a UV LED and a power source. A method of using the air filtration material wherein an air flow passes through the air filtration material, wherein the air flow has a pollutant content before passing through the material, in order to decrease the air pollutant content. The nanoparticle photocatalysts inactivate or kill the pathogens when the device is in operation.

The invention refers to a method for manufacturing a catalytic device, with the steps: a) providing a first catalyst having photocatalytic activity, a second catalyst, which is a different molecule than the first catalyst, and an adsorbent, each in a powdered state, b) mingling the first catalyst, the second catalyst and the adsorbent to form a catalytic composition and suspending them in a suspension liquid to form a slurry, and c) repeatedly coating the slurry onto a solid grid-like carrier having a plurality of through holes, configured to allow a gas to flow through the carrier, and evaporating the suspension liquid.

An air purification device including a flow passage through which air circulates; an electrical precipitator unit that is disposed in the flow passage and that includes a discharge electrode having a body unit and a corona discharge unit for corona discharge which protrudes from the body unit, and a collecting electrode disposed opposing the discharge electrode; an ozone removal unit that is disposed in the flow passage, and that is capable of removing ozone included in the circulating air, and a control unit that switches between a first mode in which air from which ozone has been removed is supplied from a downstream section of the flow passage to the outside, and a second mode in which air including ozone is supplied from the downstream section of the flow passage to the outside.

An electronic device includes a housing, a photocatalyst filter, at least one first sensor provided in the housing, a blower fan configured to introduce air into the housing, a light source configured to emit light to the photocatalyst filter, and a processor configured to control the blower fan and the light source, determine a degree of contamination of the photocatalyst filter based on a difference in sensor values between the at least one first sensor provided in the housing and at least one second sensor outside of the housing or a rate of change in sensor values between the at least one first sensor provided in the housing and the at least one second sensor outside the housing, and recycle the photocatalyst filter based on the determined degree of contamination of the photocatalyst filter.

Proposed is a photocatalytic complex. The photocatalytic complex includes a photocatalyst, and an iodine compound layer formed on a surface of the photocatalyst to cover the same and containing an iodine compound. The present disclosure enables selective degradation of hydrophilic volatile organic compounds by the use of the photocatalyst coated with the iodine compound.