Disclosed herein are base metal catalyst devices for removing ozone, volatile organic compounds, and other pollutants from an air flow stream. A catalyst device includes a housing, a solid substrate disposed within the housing, and a catalyst layer disposed on the substrate. The catalyst layer includes a first base metal catalyst at a first mass percent, a second base metal catalyst at a second mass percent, and a support material impregnated with at least one of the first base metal catalyst or the second base metal catalyst. The preferred catalyst composition is a combination of manganese oxide and copper oxide.

The present application relates to a multifunctional filter medium and a method of manufacturing the same. The multifunctional filter medium of the present application is capable of significantly reducing fine dust, harmful microorganisms, and toxic gases and reducing a pressure decrease during filtration due to exclusion of high-density nanofiber, thereby minimizing energy required for filtration and exhibiting sufficient filtration performance as a single filter medium.

Monolithic composite photocatalysts for fluid purification are disclosed. The monolithic composite photocatalysts comprise a photoactive nanocrystal component and a non-photoactive porous support. Photocatalytic fluid purification systems that contact an impurity-containing fluid with the subject monolithic composite photocatalysts are also disclosed. The monolithic composite photocatalysts may be affixed to or embedded in scaffold structures to promote fluid flow through a fluid purification system and contact with the monolithic composite photocatalysts.

Disclosed herein is a laundry treatment cabinet that includes a device for treating the interior air. The disclosed laundry treatment cabinet includes a housing; at least one interior space for receiving laundry with an access opening that can be closed by means of a door; an assembly for generating or conveying the process air through the interior space; a device for treating the interior air, wherein the device comprises a reactor chamber with a catalyst means attached therein; and a control apparatus for activating and deactivating the assembly for generating the process air. The laundry treatment cabinet also includes a flow generator for conveying the air through the reactor chamber.

A device and method for producing a thin-film catalyst are provided. The device includes a vacuum chamber, a plurality of evaporators, a plurality of gas guide pipes, an ion generator, and a control unit. The plurality of evaporators are configured to evaporate at least one film material. The plurality of gas guide pipes are configured to introduce a reactive gas. The ion generator is configured to ionize the reactive gas and the evaporated film material. The control unit is configured to control the vacuum chamber to be vacuumed, control at least two evaporators of the plurality of evaporators to be simultaneously started, control the plurality of gas guide pipes to introduce the reactive gas, and control an ion source current of the ion generator to be adjusted, such that the evaporated film material reacts with the reactive gas to form a catalytic film layer on a surface of a substrate.

The present disclosure discloses a plasma purification device for purifying catering oil fume and a method for purifying catering oil fume, relating to the technical field of atmospheric pollution control. The plasma purification device successively includes in a flow direction of airflow an inlet, a rotary discharge module configured to negatively charge oil fume particulate matter with a particle size between 2 ?m and 50 ?m in the catering oil fume; an electrostatic adsorption module configured to capture negatively charged oil fume particulate matter; a back corona catalytic module configured to treat VOCs in the catering oil fume; and an outlet. The rotary discharge module includes a central rod arranged parallel to the flow direction of airflow and a plurality of barbed corona electrodes arranged around the central rod.

A door has a stile and rail frame and a center element secured to the stile and rail frame. Openings extend through the margins of the center element, and inside and outside outer skins or elements are secured to the stile and rail frame. The inside and outside outer skins have openings adjacent to and laterally spaced apart from the openings through the margins of the center element, whereby air flows through the opening in the inside outer skin, through the openings in the margins of the center element, and through the opening in the outside outer skin in a non-linear manner to prevent pressure buildup in a room to comply with the government recommended pressure of three pascals or less.

A catalytically active material is provided. The material includes a mixed oxide having a first metal selected from group 4 of the periodic table of elements and/or a second metal, and at least one further metal selected from group 11 of the periodic table of elements, wherein the macroscopic composition of the material given by the chemical formula corresponds to the composition of the material at a molecular level. A coating made of such a material is also provide, as is an article having such a coating, and a method for producing such a material.

The present disclosure discloses a plasma purification device for purifying catering oil fume and a method for purifying catering oil fume, relating to the technical field of atmospheric pollution control. The plasma purification device successively includes in a flow direction of airflow an inlet, a rotary discharge module configured to negatively charge oil fume particulate matter with a particle size between 2 ?m and 50 ?m in the catering oil fume; an electrostatic adsorption module configured to capture negatively charged oil fume particulate matter; a back corona catalytic module configured to treat VOCs in the catering oil fume; and an outlet. The rotary discharge module includes a central rod arranged parallel to the flow direction of airflow and a plurality of barbed corona electrodes arranged around the central rod.

An apparatus and method for treating air. A housing can enclose a heating zone and an oxidizing zone positioned downstream of the heating zone with respect to a flow direction of the air being treated. A catalyst in the oxidizing zone oxidizes contaminants from the air, and an air mover positioned is configured to move air from an air inlet through the housing to an air outlet. An air treatment cycle can include an air cleaning mode at a high air flow and a self-cleaning mode at a lower air flow. A heater is operated during the self cleaning mode to oxidize contaminants that on the catalyst from the air cleaning mode.