An efficient photocatalyst nanocomposite comprising reduced graphene oxide, noble metal, and a metal oxide prepared by a one-step method that utilizes date seed extract as a reducing and nanoparticle determining size agent. The photocatalyst of the invention is a more effective sunlight photocatalyst than that prepared by traditional method in the photo decomposition of organic compounds in contaminated water.

The present disclosure relates generally to reactor systems that include (a) a housing having an interior surface that may be at least partially reflective, (b) at least one reactor cell disposed within an interior of the housing, the at least one reactor cell including an enclosure and a plasmonic photocatalyst on a catalyst support disposed within the at least one enclosure, where the enclosure is optically transparent and includes at least one inlet for a reactant to enter the at least one cell and at least one outlet for a reformate to exit the at least one cell and (c) at least one light source disposed within the interior of the housing and/or external to the housing. At least one light-management feature and/or at least one thermal-management feature is applied to the reactor cell, reactor system, or a reformer system comprising many reactor systems, in order to improve efficiency.

A point-of-use (POU) water filtration device has a container. A plurality of channels is formed within the container, water entering the container flowing through the plurality of channels. A plurality of Ultraviolet (UV) Light Emitting Diodes (LEDs) is provided. Each of the plurality of UV LEDs illuminating UV light down an associated channel of the plurality of channels.

The present disclosure relates generally to reactor systems that include (a) a housing having an interior surface that may be at least partially reflective, (b) at least one reactor cell disposed within an interior of the housing, the at least one reactor cell including an enclosure and a plasmonic photocatalyst on a catalyst support disposed within the at least one enclosure, where the enclosure is optically transparent and includes at least one inlet for a reactant to enter the at least one cell and at least one outlet for a reformate to exit the at least one cell and (c) at least one light source disposed within the interior of the housing and/or external to the housing. At least one light-management feature and/or at least one thermal-management feature is applied to the reactor cell, reactor system, or a reformer system comprising many reactor systems, in order to improve efficiency.

A water-disinfecting apparatus includes a vessel with a cathode, an insert with a photoanode, an ultraviolet light source configured to be positioned in the insert, and a power source. The cathode forms an electrically conductive layer on an inner surface of the vessel. The photoanode is configured to be positioned in the cathode. The power source is configured to be operably coupled to the cathode, the photoanode, and the light source.

Catalytic pyrolysis can upcycle waste, e.g., car bumpers, to carbon nanomaterials, preferably using synthetic TiO.sub.2 nanoparticles as catalyst during pyrolysis. Analysis of the carbon nanomaterials shows that, while RGO is produced from thermal pyrolysis of car bumper waste absent TiO.sub.2, RGO spotted with carbon dots is produced in presence of TiO.sub.2 catalyst. Rutile to anatase TiO.sub.2 phase transformation and carbon nanomaterial formation can simultaneously occur during the pyrolysis. Anatase to rutile transformation may occur while TiO.sub.2 absent the bumper material. Such TiO.sub.2-CD-RGO can be used, for example in photocatalytic degradation of organic compounds, such as methylene blue.

A method of visible-light photocatalysis combined with ClO.sub.2 oxidation for high efficient removal of organic pollutants in the wastewater, includes that i) the pH of the organic wastewater is adjusted to a constant value; the visible light photocatalysts are added to wastewater with full stirring to reach the adsorption equilibrium; (ii) turning on the Xenon lamp and adjust the distance between the light source and the liquid surface; chlorite is added to the system to reach a concentration and the reaction remained at a constant temperature with adequate stirring to achieve the degradation of organic pollutants.

Process for the preparation of a TiO.sub.2 photocatalyst/biomass carrier, with TiO.sub.2/M.sub.xO.sub.y nanocrystals, of at least nanometric size and photocatalysis-active at least in visible light, consisting of the following steps: a) preparation and heating of an aqueous solution of hydrochloric acid with a given pH, between 0 and 6, and at a temperature between 20° C. and 60° C., with no surfactant, b) addition to the acidic aqueous solution of the titanium oxide precursor, or the mixture of a TiO.sub.2 titanium oxide precursor and at least one other precursor of another M.sub.xO.sub.y oxide, consisting, 80% to 100%, of TiO.sub.2 moles and 0% to 20% of moles of another metal or semi-metal M.sub.xO.sub.y oxide, a precipitate then forming, and stirring of the acidic aqueous reaction medium obtained, so as to dissolve the precipitate; c) an immersing step of the carrier in the acidic aqueous reaction medium, d) a heating step of the acidic aqueous reaction medium, the carrier for crystallizing the titanium oxide precursors, or the mixture of the titanium oxide precursor and at least one other precursor of the other metal or semi-metal oxide, e) a possible water rinse step and a biomass carrier recovery step with TiO.sub.2/M.sub.xO.sub.y nanocrystals, bound by covalent bonds to the biomass carrier.

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.

An efficient photocatalyst nanocomposite comprising reduced graphene oxide, noble metal, and a metal oxide prepared by a one-step method that utilizes date seed extract as a reducing and nanoparticle determining size agent. The photocatalyst of the invention is a more effective sunlight photocatalyst than that prepared by traditional method in the photo decomposition of organic compounds in contaminated water.