A method for making a catalyst for ozone decomposition includes: adding a reducing agent into a water solution of a permanganate salt to obtain a first reaction liquid, and heating the first reaction liquid under continuous stirring to form a birnessite-type manganese dioxide; and adding the birnessite-type manganese dioxide into a water solution of an ammonium salt to obtain a second reaction liquid, and heating the second reaction liquid under continuous stirring to form the catalyst.

In order to limit exposure of a fan (50) and of eventually other internal components to oxidizing species induced by the operation of an ozone generator (70), a gas treatment system (10) of the type operating alternately in treatment mode and in regeneration mode comprises two adsorption devices (60, 80) which are arranged respectively upstream and downstream of the ozone generator.

In some examples, an air treatment system includes a filter, an ozone sensor, and a separator configured to separate air into a nitrogen-enriched gas and an oxygen-enriched gas. The filter is configured to remove ozone from an air stream and supply filtered air to the separator. The ozone sensor is configured to sense an ozone level of the filtered air issuing from the filter prior to encountering the separator. The air treatment system may include processing circuitry configured to monitor the ozone level sensed. The air treatment system may be part of an inerting system configured to supply the nitrogen-enriched gas to an ullage space of a fuel tank.

Disclosed is the use of a composite for extracting one or more metal or contaminating chemical species from an aerial or aqueous medium by selective binding, the composite including at least one porous template functionalized by at least one polymer, the polymer including one of the following chemical functions: primary, secondary or tertiary amine, amide, nitrile, pyridine, pyrole, thiol, thiolether, thiophene, thiadiazole, alcohol/hydroxyl, phenol, catechol, pyragalol, carboxylic acid, aldehyde, ester, acyl, crown ether, phosphate, phosphoryl, epoxide, halogen, haloalkane.

Ionization systems and methods include moving air into contact with one or more ion generators and then past an ozone removal assembly to remove at least some ozone from the air. The air may be moved by a fan and may be filtered before contacting the one or more ion generators. The amount of one or more of the following of the air may be measured: the amount of ions, particulates, temperature, humidity, and other relevant factors. The ionization amount may be adjusted based on one or more of the measured amounts. The one or more ion generators and ozone removal assembly may be constructed as part of a single unit so they can be removed and replaced easily.

A built-in apparatus and method for treating air including a housing with an air inlet and an air outlet. An air mover positioned near the air outlet is configured to draw the air through the air inlet. The housing encloses an air treatment zone, such as including an oxidizing zone, and an ozone removal zone positioned downstream of the air treatment zone and oxidizing zone. The air treatment zone includes UV light and/or ozone that partially oxidizes the chemical contaminants in the air treatment zone. A catalyst in the oxidizing zone oxidizes elements within the air treatment zone. The ozone removal zone includes a second, different catalyst material. A UV bulb that may or may not generate ozone is positioned within or downstream of the first and/or second catalyst materials to assist catalyst oxidation and/or self-clean the apparatus.

An apparatus and method are provided for capturing and sterilizing contaminants, such as viruses and the like. Air containing the contaminants is drawn into the apparatus that comprises a housing having a customized number and arrangement of dissimilar treatment chambers to remove a particular contaminate targeted for removal. The treatment chambers are selected from a group of pre manufactured, self-contained chambers that are singularly or in combination inserted into the housing and within an air flow path created by a fan. The group of treatment chambers include a UV chamber, a temperature chamber and an ozone converter chamber. The customized arrangement of treatment chambers are each placed in the air flow path and programmed to provide customized sterilization of any type of contaminate while persons are present in the space being treated.

In certain exemplary embodiments, an air purifier comprises a housing defining an enclosure and having an air entrance and an air exit; a particulate filter; a NCCO filter material configured to adsorb and decompose at least one gaseous pollutant; an AOG configured to generate at least one oxidant; an oxidant remover configured to remove at least one oxidant; a fan unit configured to generate airflow from the air entrance to the air exit; wherein the particulate filter, the NCCO filter material, the AOG, the oxidant remover and the fan unit are positioned within the enclosure such that during operation, a flow of air passes from the air entrance to the air exit through the particulate filter and the NCCO filter material along a direction of the flow of air. In certain embodiments, the air purifier may ensure safety to users while efficiency in removing contaminants can be greatly improved.

The present invention provides a UV sterilization module capable of suppressing a generation of ozone inside and outside a device, and emitting UV rays having a wavelength of near 200 to 230 nm, in particular UV rays having a wavelength of 222 nm at a high luminous intensity, and a UV sterilization apparatus using the UV sterilization module. According to the UV sterilization apparatus of the present invention, bacteria or viruses existing on a surface of the biological tissue may be selectively UV sterilized without harming animal cells such as human cells, and a generation of ozone harmful to the skin may be reduced.

A fresh air ventilation device for air pollution prevention includes a main body, a blower, a filtering and cleaning assembly, and a gas detection module. The blower is disposed in the main body to guide air convection and form a flow-guiding path. The filtering and cleaning assembly is disposed in the flow-guiding path to filter and clean an air pollution source in the air convection guided by the blower. The gas detection module is disposed in the flow-guiding path of the main body to detect the air pollution source and transmit a gas detection data.