Provided herein is a catalytic article including a catalytic coating disposed on a substrate, wherein the catalytic coating comprises a bottom coating on the substrate and a top coating layer on the bottom coating layer, one such coating layer containing a platinum group metal on a refractory metal oxide support and the other such coating layer containing a ceria-containing molecular sieve. Such catalytic articles are effective toward treating exhaust gas streams of internal combustion engines and exhibit outstanding resistance to sulfur.

The disclosure discloses a catalyst capable of simultaneously removing COS and H.sub.2S in garbage gasification and a preparation method thereof, and belongs to the technical field of preparation of desulfurization catalysts. The method includes the following steps: pretreating an SBA-15 molecular sieve with a templating agent unremoved, which primarily includes the steps of removing the templating agent and introducing halogen atoms to modify the molecular sieve; then synthesizing an active component solution; and finally introducing active components into channels of the pretreated molecular sieve via surface tension by adopting an impregnation method, performing washing and drying, and performing calcining under an N.sub.2 atmosphere, so as to obtain the catalyst. The catalyst prepared according to the present disclosure can load the active components in fixed positions inside and outside the channels, and the components are easy to obtain, thereby having the advantages of low cost and good desulfurization effects.

The present application provides a wall-mounted air purifier, including casing, a filter installed in the casing, and a fan installed in the casing. The casing is defined by an air inlet and an air outlet, and the air outlet is located at the position corresponding to the outlet of the fan. The filter is arranged between the air inlet and the fan, a photocatalytic module is installed in the casing, and the photocatalytic module is arranged between the air inlet and the fan. The wall-mounted air purifier provided in the present application filters and purifies the air by arranging a filter in the casing; and arranging a photocatalytic module in the casing to sterilize and disinfect the gas entering the air inlet and decompose harmful molecules in the gas for better purifying the air and improving the air purification capacity.

The invention discloses a nitrogen-doped mesoporous carbon-coated Titanium dioxide composite photocatalyst, a preparation method and use thereof. The preparation method comprises the steps of: dissolving an organic ligand and Ti(OC.sub.3H.sub.7).sub.4 in a mixture of methanol and DMF at a certain ratio, performing a hydrothermal reaction, centrifuging and drying to obtain a Titanium-based metal organic framework (Ti-MOF); pyrolyzing the obtained Ti-MOF under an inert atmosphere, and oxidizing the same for etching to obtain a nitrogen-doped mesoporous carbon-coated Titanium dioxide composite photocatalyst. The obtained composite photocatalyst not only facilitates the adsorption, enrichment and mass transfer of low concentration VOCs, but also efficiently degrades VOCs under sunlight. It has high degradation activity and stability when performing photocatalytic removal of VOCs in the presence of visible light, is simple in synthesis, low in preparation cost, and has strong potential for the use in environmental protection.

The present invention provides a wireless rechargeable and portable anti-microbial respirator. The respirator includes a face-piece with an air inlet and an air outlet; a first belt and a second belt, the first belt is connected to ends of the face-piece, and the second belt is configured to wrap around the waist of a user; a flexible outlet tube, where the first end of the flexible outlet tube is connected to the air outlet of the face-piece; a flexible intake tube, where the first end of the flexible intake tube is connected to the air inlet of the face-piece; and a filtration system fixed onto the second belt. The key features of the respirator in the present invention include highly antibacterial and antiviral, long duration, reusable, self-cleaning and self-disinfecting, lightweight and portable, wireless power transfer, and great airflow and comfortable breathing.

This disclosure discloses an air purification apparatus, and the air purification apparatus includes an inner housing, a plurality of photocatalytic reactors and a light source. The inner housing is porous to allow air flow to pass. The photocatalytic reactors are filled in the inner housing. The photocatalytic reactors respectively have a photocatalytic layer formed thereon. The light source is disposed in the inner housing and surrounded by the photocatalytic reactors. The light source is configured to irradiate photocatalytic reactors to activate the photocatalytic layers on the photocatalytic reactors.

An integrated waste gas treatment system includes an adsorption/desorption device that receives a waste gas that includes an organic compound and an organic nitrogen compound exhausted from a semiconductor manufacturing facility, where the adsorption/desorption device adsorbs the organic compound and the organic nitrogen compound and concentrates and desorbs the organic compound and the organic nitrogen compound, and a catalytic decomposition device disposed adjacent to the adsorption/desorption device, where the catalytic decomposition device includes a catalytic chamber that provides a gas passage through which a gas desorbed from the adsorption/desorption device flows and an oxidation-reduction catalyst disposed in the gas passage that removes the organic compound and the organic nitrogen compound from the desorbed gas. The organic compound and the organic nitrogen compound are subjected to an oxidation treatment by the oxidation-reduction catalyst, and nitrogen oxides generated by the oxidation treatment are removed by a selective reduction reaction.

An oven includes a cooking compartment for preparing food, a vapor extraction apparatus designed to extract vapors from the cooking compartment, and a catalyst fluidically coupled to the vapor extraction apparatus and designed to convert catalytically the vapors extracted in the vapor extraction apparatus. The catalyst includes a carrier and a layer of catalyst material applied on the carrier. In a normal mode of the oven for preparing food to be cooked, the catalyst has a concentration of acetic acid in the converted vapors which concentration of acetic acid amounts to less than or equal to 5 ppm. The oven is also able to operate in a pyrolysis mode which differs from the normal mode.

Provide is a functional structural body that can suppress aggregation of metal oxide nanoparticles and prevent functional loss of metal oxide nanoparticles, and thus exhibit a stable function over a long period of time. A functional structural body (1) includes: a skeletal body (10) of a porous structure composed of a zeolite-type compound; and at least one type of metal oxide nanoparticles (20) containing a perovskite-type oxide present in the skeletal body (10), the skeletal body (10) having channels (11) that connect with each other, and the metal oxide nanoparticles (20) being present at least in the channels (11) of the skeletal body (10).

A method for purifying a gas inside a polymer film production furnace with the use of the purification catalyst is provided. A purification catalyst for a gas inside a polymer film production furnace, contains a mixed oxide composed of a manganese-based oxide containing manganese and potassium and having a cryptomelane structure, and copper oxide. A method for purifying a gas inside a polymer film production furnace, includes a step 1 of bringing hot air containing volatile and/or sublimable organic substances, generated during production of a polymer film by the polymer film production furnace, into contact with the catalyst provided inside or outside the furnace, at a temperature in the range of 200 to 350° C. to decompose the organic substances oxidatively, and a step 2 of refluxing all or a part of a resultant decomposition gas to the polymer film production furnace.