A catalyst for decomposing an organic substance, the catalyst having a body which has a plurality of pores and the body contains a perovskite-type composite oxide represented by A.sub.xB.sub.yM.sub.zO.sub.w, where the A contains at least one selected from Ba and Sr, the B contains Zr, the M is at least one selected from Mn, Co, Ni, and Fe, 1.001≤x≤1.1, 0.05≤z≤0.2, y+z=1, and w is a positive value that satisfies electrical neutrality. The average pore diameter of the plurality of pores is 49 nm to 260 nm and the pore volume of each of the plurality of pores is 0.08 cm.sup.3/g to 0.37 cm.sup.3/g.

A photocatalyst filtration system for a vehicle includes a housing having an airflow path, and a filter configured to filter air flowing in the airflow path, the filter having a first photocatalyst and a second photocatalyst. The system further includes a first ultraviolet (UV) light source disposed proximate the filter and configured to energize the first photocatalyst, and a second UV light source disposed proximate the filter and configured to produce light having a shorter wavelength than light produced by the first UV light source, and configured to energize the second photocatalyst. One of the first photocatalyst or the second photocatalyst is configured to remove odor from the air. The other of the first photocatalyst or the second photocatalyst is configured to remove bacteria from the air.

A photocatalyst filtration system for a vehicle includes a housing having an airflow path, and a filter configured to filter air flowing in the airflow path, the filter having a first photocatalyst and a second photocatalyst. The system further includes a first ultraviolet (UV) light source disposed proximate the filter and configured to energize the first photocatalyst, and a second UV light source disposed proximate the filter and configured to produce light having a shorter wavelength than light produced by the first UV light source, and configured to energize the second photocatalyst. One of the first photocatalyst or the second photocatalyst is configured to remove odor from the air. The other of the first photocatalyst or the second photocatalyst is configured to remove bacteria from the air.

A system, method, and air purification device. Air is taken in from an environment into the air purification system. The air is prefiltered. The air is filtered with a primary filter. The filtered air is treated with vacuum ultraviolet radiation in a primary reaction chamber to generate irradiated air. The irradiated air is treated with ultraviolet-C radiation in a secondary reaction chamber to remove ozone. Ozone and other contaminants are removed from the irradiated air utilizing a carbon filter to generate purified air. The purified air is emitted back into the environment from the air purification system.

Apparatus, methods and instructions for disinfecting air. The apparatus may include, and the methods may involve, a fixture. The fixture may include a germicidal light source. The fixture may include a fan. The fan may circulate air through a volume into which the germicidal light source propagates germicidal light. The light source may be configured to emit, upward from a horizontal plane, a beam that, absent reflection off an environmental object, does not cross the horizontal plane. The apparatus may include a shield that prevents light from the light source from crossing the horizontal plane. The sensor may face upward from the horizontal plane. The sensor may face downward from the horizontal plane.

Apparatus, methods and instructions for disinfecting air. The apparatus may include, and the methods may involve, a fixture. The fixture may include a germicidal light source. The fixture may include a fan. The fan may circulate air through a volume into which the germicidal light source propagates germicidal light. The light source may be configured to emit, upward from a horizontal plane, a beam that, absent reflection off an environmental object, does not cross the horizontal plane. The apparatus may include a shield that prevents light from the light source from crossing the horizontal plane. The sensor may face upward from the horizontal plane. The sensor may face downward from the horizontal plane.

A system for disinfecting a mass transit vehicle includes a storage tank for storing a disinfection solution. A plurality of nozzles are installed in the interior of the mass transit vehicle. The plurality of nozzles projecting droplets of the disinfection solution into the interior of the mass transit vehicle when the system is activated. A pump pumps the disinfection solution from the storage tank to the plurality of nozzles on the interior of the mass transit vehicle. A control switch initiates operation of the system. A system indicator indicates an operational status of the system. A controller controls the operation of the pump responsive to an input from the control switch. Responsive to actuation of the control switch to a first position, the controller actuates the system indicator for a first predetermined period of time and actuates the pump to pump the disinfection solution from the storage tank to the plurality of nozzles on the interior of the mass transit vehicle for a second predetermined period of time after expiration of the first predetermined period of time.

Fabrics, such as employed in air filters, facemasks, garments, or PPE, are coated with pathogen-binding agents, such as chemicals that bind to protein-encapsulated airborne pathogens. Some of these pathogen-binding agents include multifunctional chemicals that bind to the fabrics and to exposed proteins and/or glycans on the pathogens. Some of these pathogen-binding agents include multifunctional silanes. Some of these pathogen-binding agents include multifunctional phosphanes or phosphonates.

Fabrics, such as employed in air filters, facemasks, garments, or PPE, are coated with pathogen-binding agents, such as chemicals that bind to protein-encapsulated airborne pathogens. Some of these pathogen-binding agents include multifunctional chemicals that bind to the fabrics and to exposed proteins and/or glycans on the pathogens. Some of these pathogen-binding agents include multifunctional silanes. Some of these pathogen-binding agents include multifunctional phosphanes or phosphonates.

Methods of forming an antiviral facial mask that is capable of not only filtering pathogen particles, but also deactivating pathogen particles prior to exposure by the wearer. Typical facial masks do not deactivate pathogen particles, but rather merely capture viral particles on an outer surface of the mask. As such, the masks present a risk of interaction between the mask wearer and the particles, such as during the removal and/or application of the masks. Methods of forming enhanced antiviral facial masks include the formation of fibers via electrospinning, such that the fibers include a solution of two oppositely charged polyelectrolytes, surfactants, and metal ions. In use, water from human breath activates the surfactants to capture and deactivate pathogen particles. Moreover, the strength of the fibers from the oppositely charged polyelectrolytes results in increased lifespans of the masks, as the masks do not breakdown in the presence of high humidity.