A fluid filtration system that includes one or more layers, including a trapping layer and a reactive layer, connected to a frame. A method for fluid filtration that includes sorbing contaminants, trapping contaminants, and degrading contaminants.

An air cleaner including a case comprising an upper surface and a side surface, a sensor to measure a degree of contamination of air introduced into the case, a round portion in a shape that is curved on the upper surface of the case, and a sensor air inlet on the round portion and through which air is introduced.

A method of forming a bismuth-based catalyst can include mixing an inorganic alkali compound, a bismuth source compound, a transition metal precursor, and a reducing agent in an aqueous solution to form a bismuth precursor liquid. The bismuth precursor liquid can be hydrothermally reacted at a conversion temperature for a conversion time to produce the bismuth-based catalyst.

A plasma filter for treating a gas flow therethrough. The filter has a dielectric barrier plasma electrode assembly including a plurality of electrodes having a dielectric barrier layer coated thereon. The dielectric barrier plasma electrode assembly is configured to produce an atmospheric pressure plasma, A filtration medium is disposed on or between the electrodes, and a photocatalytic material is formed on surfaces of the filtration medium. Upon operation of the plasma filter, the plasma infiltrates voids in the filtration medium, and the gas flow through the filtration medium a) is exposed to reactive species of the plasma, b) interacts with the catalytic material, and c) is exposed to light generated from the plasma.

The present invention relates to a photocatalytic module for an automobile air conditioner and an automobile air conditioner having the same and, more particularly, to a photocatalytic module capable of eliminating various germs resulting from dew formed on an evaporator installed in an automobile air conditioner and corresponding bad smell, and an air conditioner having the same.

The photocatalytic module includes a duct fixation frame 54 adjacent to an inner wall of the duct 10; a filter fixation frame 55 having one end connected to the duct fixation frame, the filter fixation frame 55 fixing the photocatalytic filter 52; a photocatalytic filter 52 fixed by the fixation frame 55, being formed by applying a photocatalytic material onto a supporter having a shape of a plurality of cells neighboring each other and provided with a plurality of airflow paths; and a substrate 58 fixed to the duct fixation frame 54 and equipped with an ultraviolet (UV) light emitting diode (LED) 59 for radiating ultraviolet light toward the photocatalytic filter 52.

The present provides an air conditioner having the photocatalytic module installed therein and an LED disposed upstream of the photocatalytic filter on the flow path of the duct.

The disclosure provides a system and a method for reducing hazardous gases, including PHGs, through one or more photocatalysts in a filter system. A microstructure of the photocatalytic filter can be formed using biological systems as a template for the photocatalysts to be deposited thereon. The biological system can be removed by heat, oxidation, or by chemical processes to leave the photocatalytic template as a filter for the gases. In various embodiments, multiple photocatalysts can be activated at different wavelengths to filter different gases, or multiple photocatalysts can be activated at the same wavelength to filter different gases, or a photocatalyst can be activated at different wavelengths to filter different gases, or some combination thereof. The activation can be sequential or concurrent. For multiple layers of photocatalysts, the sequence of the photocatalysts can be arranged to reduce damaging output from an upstream photocatalyst to one or more downstream photocatalysts.

Disclosed herein is an air cleaner which performs dust collection and sterilization as well as deodorization while having a small size enough to be fitted into a vehicle cup holder for its use, and has a strong and easy maintenance structure. The air cleaner includes a photocatalytic UV LED (57) installed on an UV LED substrate (55), and a photocatalytic filter installed on a surface facing the photocatalytic UV LED while being spaced apart from the UV LED substrate. The photocatalytic filter has a structure in which a photocatalytic material is coated on a base in which a plurality of cells (83) defining an air flow path in a direction toward the photocatalytic UV LED are arranged in parallel adjacent to each other.

A refrigerator includes a main body having a storage room formed therein, a door that opens and closes the storage room, a filter module, and a cool air circulation fan that circulates cool air through the filter module. The filter module includes a metal photocatalyst filter and a UV LED module for radiating UV rays to the metal photocatalyst filter. The metal photocatalyst filter has photocatalysts made of one of ZnTiO.sub.2, CuTiO.sub.2, AgTiO.sub.2 or FeTiO.sub.2 coated on a filter base. The filter module may allow the entire storage room to be uniformly subject to antibiosis and sterilization at a relatively low cost.

A gas purifying and processing method for exercise environment is provided and includes steps: (a) providing a purification device for exercise environment in an exercise environment, wherein the purification device for exercise environment includes a main body, a purification unit, a gas guider and a gas detection module; (b) detecting a particle concentration of the suspended particles contained in the purified gas in real time by the gas detection module; and (c) detecting, issuing an alarm and/or notification, and notifying an exerciser to stop exercising, and feeding back to the purification device to adjust an airflow rate of the gas guider by the gas detection module, wherein the gas guider discharge a gas at the airflow rate within 3 minutes to reduce the particle concentration of the suspended particles to less than 0.75 μg/m.sup.3, wherein the airflow rate is at least 800 ft.sup.3/min, and the main body maintains a breathing distance ranged from 60 cm to 200 cm.

A photocatalytic composition is disclosed that includes a silver halide in combination with one or more rare earth elements. The composition may be used for the photocatalytic degradation of pollutants.