Embodiments generally relate to a method for purifying air of an interior space by oxidizing a plurality of pollutant compounds suspended in the air. The method comprises exposing the air of the interior space to a photocatalytic layer, wherein the photocatalytic layer is disposed onto an at least one surface of a porous substrate material located in the interior space, wherein the photocatalytic layer comprises a plurality of photocatalyst particles, and activating the photocatalytic layer with a light source, wherein the activated photocatalytic particles promote a reaction between the pollutant compounds and the air.

A lamellar arrangement for shielding radiation acting on a fluid which flows through an interior of a device, comprises two or more lamellae aligned substantially parallel to one another and respectively defining an intermediate space between them, wherein at least one subset of the lamellae is respectively subdivided into at least three lamella sections comprising a first lamella section, a second lamella section next to the first lamella section and a third lamella section next to the second lamella section. The first lamella section and the second lamella section in this case enclose a first angle between them, and the second lamella section and the third lamella section enclose a second angle between them. The first angle has a magnitude in a range of from 20° to 45° and the second angle has a magnitude in a range of from 20° to 45°.

A recyclable ceramic catalyst filter, a filtering system including the same, and a method of managing the filtering system are provided. The ceramic catalyst filter has a monolithic structure including a first surface which blocks a first material; and a second surface which removes a second material that passed through the first surface, where the second surface is activated and operates as a catalyst layer which removes the second material in response to energy supplied to the second surface.

A photosensitizer formulation can be disposed on or in a mesh; net; netting; screen; curtain of strands, fibers, or monofilaments; substrate, personal protective gear, mask, or any other suitable object. The photosensitizer formulation, when in contact with molecular oxygen and activated by light or ultrasound, produces microbicidal singlet oxygen. A variety of different arrangements and applications are described. For example, an air flow device may also be included to generate a flow of air through or over the photosensitizer formulation. A fluorescent formulation may be included to monitor photobleaching. The photosensitizer formulation may be disposed in a concentration gradient to generate antigenic particles by damaging or destroying microbes.

A photocatalytic reactor housing having a longitudinal axis allowing a fluid to flow through; a frame holding a light source and blades substantially encompassing the light source around the longitudinal axis; each blade having an interior surface facing the light source and an exterior surface opposite the interior surface; at least a portion of the surface of a plurality of the blades having a coating of material with photocatalytic oxidative properties; and the interior surface of the blade configured to redirect some amount of the light emitted onto another portion of substrate of an adjacent blade. In one embodiment the blades are tilted in the radial direction along at least a portion of the blades. In one embodiment the interior surface is configured to reflect some of the light emitted by the light source on to at least a portion of the exterior surface of an adjacent blade.

In various embodiments, an air purifier capable of destroying and deactivating airborne contaminants such as SARS-CoV-2 is described. The air purifier comprises a photocatalytic system comprising at least one photoactivated semiconductor photocatalyst and a lamp configured to irradiate and excite the at least one photoactivated semiconductor photocatalyst to generate reductive and/or oxidative reactive species from oxygen and/or water on the photocatalyst surface. In various embodiments, the photocatalytic system comprises a stack of PCB cards, each card having a photocatalytic layer disposed thereon, or a 3-dimensionally ordered macroporous (3-DOM) structure comprising an open cell lattice.

Provided are a catalyst structure for ozone decomposition including a support containing a porous inorganic material, and an α-MnO.sub.2 catalyst located on at least a portion of inner pores and a surface of the support, an air-cleaning method using the same, and an air-cleaning device and an air-cleaning system each including the catalyst structure for ozone decomposition.

Methods, systems, and apparatuses for producing one or more of trioxygen, reactive nitrogen species, hydrogen and its ions, oxygen and its ions, and electronically modified oxygen derivatives from oxidizing agents that are exposed to certain frequencies of photon/phonon emissions, exposed for certain amounts of time, and exposed to certain intensities of photon/phonon emissions. The oxidizing agent or oxidizing agents can be exposed to multiple frequencies and wavelengths of photon/phonon emissions and multiple exposures of photon/phonon emissions. The methods displayed provide a new paradigm to perform photocatalytic oxidation of substrates using photon/phonon emissions and/or MPA as energy input, trioxygen, hydrogen and oxygen and its isotopes as the catalysts and oxidizing agents as the oxygen source and the elimination or reduction of dissociation reactions to minimize hindrances to the reactions.

An air sterilization device for a vehicular air conditioner may include an air conditioner case, which includes an air inlet provided at an intake side of the air conditioner case and an air outlet provided at a discharge side of the air conditioner case and which includes an air path therein, a photocatalytic unit, which is configured to blow internal air or external air toward the air outlet of the air conditioner case and a surface of which is coated with a photocatalyst, and an optical source unit configured to radiate ultraviolet rays to the photocatalytic unit to thus cause a photocatalytic reaction at the photocatalytic unit, generating hydroxyl radicals.

This application provides an air purifier, which includes a casing, a fan, a filter, and a purification module. The filter is in a cylindrical shape. The purification module includes an inner filter for purification of harmful gases in air. The inner filter includes an inner filter cylinder and a purification plate, the purification plate and/or the inner filter cylinder are honeycomb-like or reticulate, and the inner filter cylinder is disposed in the filter. In the present application, the air purifier is provided with an inner filter to remove harmful gases such as formaldehyde in the air, and the purification plate and/or inner filter cylinder are honeycomb-like or reticulate to reduce wind resistance of the inner filter and reduce air resistance, thereby reducing the fan speed and noise.