The integrated device for adsorptive purification and catalytic regeneration of VOCs is provided and includes a filtration adsorption coupling filter, a catalytic combustion regeneration box and a housing, where the housing includes a filter inner cavity and a combustion inner cavity that are communicated in sequence. The VOC exhaust gas is adsorbed and filtered by the filtration adsorption coupling filter. Moreover, under an operating condition of desorption regeneration, the catalytic combustion regeneration box is utilized to perform thermal desorption and regeneration on the filtration adsorption coupling filter, and catalytically combust and purify the VOC exhaust gas obtained by thermal desorption.

A composition comprising catalytic materials mixed with diatomaceous earth is provided, wherein, when the composition is exposed to irradiance, heat or other necessary activation environmental factors, the composition actively removes and degrades volatile organic compounds and/or metal ions from air or water streams. The composition can contain binding agents, rheology modifiers, and is shaped via compression or molding to be easily handled. Additionally, the composition can be used in forced-air or water streams to actively remove and degraded volatile organic compounds and/or metal ions from air or water streams.

A supported catalyst for decomposing an organic substance that includes a carrier and catalyst particles supported on the carrier. The catalyst particles contain a perovskite-type composite oxide represented by A.sub.xB.sub.yM.sub.zO.sub.w, where A contains at least one of Ba and Sr, B contains Zr, M is at least one of Mn, Co, Ni, and Fe, y+z=1, x>1, z<0.4, and w is a positive value that satisfies electrical neutrality. An organic substance decomposition rate after the supported catalyst is subjected to a heat treatment at 950° C. for 48 hours is greater than 0.97 when the organic substance decomposition rate before the heat treatment is regarded as 1, and an amount of the catalyst particles peeled off when the supported catalyst is ultrasonicated in water at 28 kHz and 220 W for 15 minutes is less than 1 wt % of the catalyst particles before untrasonication.

A nano-functionalized support (1) comprises an application surface (2) and a photocatalytic nanoparticle coating (3) deposited on the application surface (2). The photocatalytic nanoparticle coating (3) comprises titanium dioxide doped with a nitrogen-containing doping agent.

An organic matter decomposition catalyst that contains a perovskite type complex oxide represented by A.sub.xB.sub.yM.sub.zO.sub.w, wherein A contains 90 at % or more of at least one element selected from the group consisting of Ba and Sr, B contains 80 at % or more of Zr, M is at least one element selected from the group consisting of Mn, Co, Ni, and Fe, y+z=1, x>1, z<0.4, and w is a positive value that satisfies electrical neutrality.

A photocatalytic material includes activated carbon, titanium dioxide, zinc oxide, graphene, tourmaline powders, a nano-copper solution, carvacrol and deionized water. The photocatalytic material is prepared by mixing the activated carbon, the titanium dioxide, the zinc oxide, the graphene, the tourmaline powders, the nano-copper solution, the carvacrol and the deionized water for a period ranging from 1 to 12 hours. A photocatalytic air screen filter for epidemic prevention includes a substrate and the photocatalytic material. The photocatalytic material is applied on a surface of the substrate, and the photocatalytic material is dried and cured. An amount of the material loaded on the surface of the substrate is in a range of 0.1 to 100 mg/cm.sup.2.

A nano-functionalized support comprises an application surface and a photocatalytic nanoparticle coating deposited on the application surface. The photocatalytic nanoparticle coating comprises titanium dioxide doped with a nitrogen-containing doping agent.

A method for preparing a porous nano-fiber heterostructure photocatalytic filter screen includes: preparing a noble metal nanostructure with tunable spectra and a heterostructure composite photocatalyst of a photocatalytic material; and preparing a large area and multilayer porous nano-fiber filter screen structure, while utilizing a scattering enhancement effect of metal nanoparticles in an porous optical fiber to realize repeated conduction of sunlight in the optical fiber and finally interact with the composite photocatalyst on a surface to improve photocatalytic efficiency. Preparation of the heterostructure composite photocatalyst with a wide spectral response of and tunable visible to infrared band spectra is realized, at the same time, with reference to high adsorbability, high light transmission of nanometer fiber and unique optical characteristics of metal nanoparticles, an air purification filter screen with a high sunlight utilization rate and a high catalytic degradation capability is creatively provided.

An ozone cleaning system includes a decontamination chamber, a utility chamber coupled to the decontamination chamber, and a utility assembly disposed within the utility chamber. The utility assembly is configured to decontaminate at least one of contaminated gear and contaminated equipment positioned in the decontamination chamber by treating organic carcinogens. The utility assembly includes an ozone generator configured to provide ozone to the decontamination chamber, a humidifying unit configured to provide humidity to the decontamination chamber, and a vacuum blower configured to at least one of (i) generate a vacuum within the decontamination chamber and (ii) pull the ozone from the decontamination chamber following a decontamination process.

A process for purifying a feed gas stream containing at least 90% of CO.sub.2, at least 20% RH and at least one impurity chosen from chlorinated, sulfur-bearing, nitrated or fluorinated compounds is provided. The process includes a) subjecting the feed gas stream to catalytic oxidation producing a stream containing at least one of HCl, NOx, SOx or hydrofluoric acid; b) maintaining the temperature of the gas stream above the highest value between the dew points of water and the acid(s) contained in the gas; c) removing at least a part of the acid impurities by bringing the gas stream into contact with a corrosion-resistant heat exchanger to condense the acid compounds while regulating the temperature of the gas stream exiting below the dew point of water; and d) separating the acid condensates with a corrosion-resistant separator in such a way as to produce a CO.sub.2-enriched gas stream.