The present disclosure relates to a method for photocatalytic ozonation reaction, in which the silicon carbide material is used. By using the silicon carbide material for photocatalytic ozonation reaction, the present disclosure overcomes the problem of low photocatalytic efficiency of silicon carbide, utilizes photogenerated electrons therefrom with strong reducibility to reduce ozone molecules to efficiently produce hydroxyl radicals, so as to improve the oxidation capacity in the process. Whether visible light or ultraviolet light is coupled with ozone, the group has strong catalytic activity, moreover, the silicon carbide has low cost and good stability, which prolongs the life of catalyst for photocatalytic ozonation or device.

There is provided a photocatalyst sheet comprising a base material and a photocatalyst layer containing at least a photocatalyst, wherein the photocatalyst layer is firmly adhered to the base material. In an embodiment, there is provided a photocatalyst sheet comprising a base material; and a photocatalyst layer that contains at least a photocatalyst, and is formed on at least one surface of the base material through an aerosol deposition method. This photocatalyst sheet has an excellent photocatalytic activity and an excellent adhesion.

An air filter, including: at least one wall-flow honeycomb particulate filter having at least one coat on at least a portion of the interior surface of the filter, wherein the at least one coat comprises at least one of: a sorbent; a catalyst; or a combination thereof, and the air filter, in-use, retains from filtered air at least one of: a particulate, a volatile organic compound, or a combination thereof. Also disclosed is an interior air purification system including the air filter, and methods of making and using the air filter.

The present disclosure relates to a particle including at least one atomic-scale channel formed on a surface of the particle or on a surface and inside of the particle; a catalyst including the particle, particularly a catalyst for efficient and selective electrochemical conversion of carbon dioxide into high value-added C.sub.2+ fuel; and a method of preparing the particle.

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.

The present invention relates to a catalyst comprising particles of a ternary intermetallic compound of the following formula (I): X.sub.2YZ wherein X, Y, and Z are different from one another; X being selected from the group consisting of Mn, Fe, Co, Ni, Cu, and Pd; Y being selected from the group consisting of V, Mn, Cu, Ti, and Fe; and Z being selected from the group consisting of Al, Si, Ga, Ge, In, Sn, and Sb; wherein the particles of the ternary intermetallic compound are supported on a support material, as well as to a method for its production and to its use as a catalyst, and more specifically as a catalyst in a process for the condensation of a carbonyl compound with a methylene group containing compound or for the selective catalytic reduction of nitrogen oxides in exhaust gas.

The current embodiments relate to ruthenium-containing supported catalysts, including processes for their manufacture and use, which destroy, through catalytic oxidation, hazardous compounds contained in chemical industrial emissions and otherwise produced from industrial processes.

Methods and systems are provided for producing solid carbon from carbon dioxide and/or hydrocarbons such as methane (CH.sub.4). A metallic media, either in liquid or semi-liquid (semi-solid) form and having a range of liquid and semi-liquid metallic chemistries, is used alone or in combinations with other liquid or semi-liquid metalin a reactive metallurgical process for carbon capture and conversion.

In one embodiment, a process for the purification of CO.sub.2 from chlorinated and non-chlorinated hydrocarbons, comprising: contacting a CO.sub.2 stream with a metal oxide catalyst, wherein the stream comprises the CO.sub.2 and impurities comprising the non-chlorinated hydrocarbons and the chlorinated hydrocarbons; interacting the impurities with the catalyst to form additional CO.sub.2 and metal chloride; and regenerating the catalyst by contacting the metal chloride with an oxygen containing gas stream. In another embodiment, a process for the purification of CO.sub.2 from chlorinated hydrocarbons and non-chlorinated hydrocarbons, comprising: contacting a CO.sub.2 stream with a metal oxide catalyst, wherein the CO.sub.2 stream comprises the CO.sub.2 and impurities comprising the non-chlorinated hydrocarbons and the chlorinated hydrocarbons; oxidizing the impurities with catalyst oxygen to form additional CO.sub.2 and converting the chlorine to metal chloride; and regenerating the catalyst by contacting the metal chloride with an oxygen containing gas stream.

Disclosed are a grain boundary and surface-doped rare earth manganese-zirconium composite compound as well as a preparation method and use thereof. A rare earth manganese oxide with a special structure is formed at grain boundary and surface of a rare earth zirconium-based oxide by a grain boundary doping method so as to increase oxygen defects at the grain boundary and the surface, thereby increasing the amount of active oxygen, improving the catalytic activity of the rare earth manganese-zirconium composite compound, inhibiting high-temperature sintering of the rare earth manganese-zirconium composite compound, and improving the NO catalytic oxidation capability. When the rare earth manganese-zirconium composite compound is applied to a catalyst, the consumption of noble metal can be greatly reduced.