This invention is a bioreactor device adapted to improve air quality. The bioreactor consists of a base that houses the mechanical components and a vessel that holds liquid mixture of water, a photosynthetic microorganism, and a media. The bioreactor has an air pump which draws room air into the base of the device through an air filter. The bioreactor bubbles the air through the liquid mixture. Photosynthesis converts the carbon dioxide to oxygen.

A carbon sequestration device configured to remove carbon dioxide from environmental air in an exterior environment has a housing forming a concave region with an open top, and a panel covering the open top. At least a portion of the panel is light-transmitting and also includes at least one solar cell. The panel and concave region together form an interior chamber configured to contain water and algae. The device also has an environmental air inlet formed in the housing for receiving pressurized environmental air from the exterior environment, as well as a temperature sensor in thermal communication with the interior chamber to sense the temperature in the interior chamber. The device also has a thermal regulator in thermal communication with the interior chamber. The thermal regulator is configured to control the temperature in the interior chamber as a function of the temperature sensed by the temperature sensor.

The present invention discloses a catalyst for in-situ CO2 capture and coupling reduction with biomass oxidation, a preparation method therefor and an application thereof. The catalyst is applied to the coupling reaction of photocatalytic CO2 reduction and biomass oxidation. The preparation of the catalyst is to synthesize layered double hydroxides (LDHs) containing CO32 between layers by using coprecipitation method, hydrothermal method, sol-gel method and the like, wherein the chemical formula is [M1x2+Mx3+(OH)2]x+(An)x/n.Math.mH2O, which has a thickness of 20-30 nm and an average particle diameter of 60-90 nm. Then metal ion vacancy defects are produced on LDHs laminate by using a NaOH/KOH selective etching to obtain the corresponding catalyst. The catalyst is used in photocatalytic reaction, characterized in that CO32 is continuously consumed in the reaction process, and the catalyst can absorb CO2 in the air for recovery after the reaction, and can be repeatedly used to continuously consume CO2 in the air, thus realizing the direct capture and effective utilization of CO2.

Devices and methods are disclosed for enhancing drying, dehumidifying, cooling, dehydrating, and evaporating processes by harnessing direct, non-thermal photon-induced removal of liquid molecules from a surface. Each apparatus integrates a configurable photon-emitting module (LED, laser, or array) that delivers predominantly TM-polarized light in the visible band (e.g., 495 nm-570 nm) at an incidence configured to approximate the Brewster angle, such as within 5 of the Brewster angle. Placement of these light sources, together with light-permeable or patterned surfaces, maximizes the normal electric-field component at the interface and enlarges the illuminated area, thereby enhancing cluster ejection and vapor formation while minimizing bulk heating. Representative embodiments include a regenerating desiccator, clothes dryer, solvent extractor, indirect and direct evaporative coolers, food dehydrator, and a valveless microfluidic pump. Integrated control units modulate wavelength, pulse width, incidence geometry, airflow, and ancillary actuators in real time to match load and environmental conditions.

A system for photocatalytic conversion includes a flowline, in which a production flow travels in a flow direction; and a reactor module. The reactor module includes a waveguide; a photocatalyst coupled to the waveguide, configured to convert hydrogen sulfide in the production flow to hydrogen and sulfur; a heater configured to heat a bottom of the reactor module, such that the sulfur is in liquid phase; and a sulfur collector configured to collect the sulfur. A method for photocatalytic conversion includes introducing a production flow from a flowline to a reactor module, the production flow including hydrogen sulfide and traveling in a flow direction; directing a light from a light source to a photocatalyst through a waveguide; converting the hydrogen sulfide into hydrogen and sulfur using the photocatalyst; and heating a portion of the reactor module to an elevated temperature, the sulfur in a liquid phase under the elevated temperature.

The disclosure provides a photocatalyst module capable of reducing manufacturing costs, reducing size, reducing thickness, saving power, and reducing noise. A photocatalyst module according to the disclosure includes a housing including at least one air inlet and at least one air outlet, a light source unit disposed inside the housing, and a photocatalyst unit disposed inside the housing. The light source unit and the photocatalyst unit are provided so that the photocatalyst unit is irradiated with light from the light source unit. The light source unit includes a light source, and a heat dissipator provided to dissipate heat generated by the light source unit. The light source unit, the air inlet, and the air outlet are provided so that a flow of gas from the air inlet toward the air outlet is generated by the heat dissipated from the heat dissipator.

Proposed is a photocatalytic complex. The photocatalytic complex includes a photocatalyst, and an iodine compound layer formed on a surface of the photocatalyst to cover the same and containing an iodine compound. The present disclosure enables selective degradation of hydrophilic volatile organic compounds by the use of the photocatalyst coated with the iodine compound.

A photocatalyst including a first metal oxide; and a second metal oxide, wherein the first metal oxide is disposed on a surface of the second metal oxide, and wherein absorbance of the photocatalyst in a wavelength region of about 200 nanometers (nm) to about 600 nm is about 5% to about 50% greater than an absorbance of TiO.sub.2 in the wavelength region of about 200 nm to about 600 nm.

A compound having the following structure:

##STR00001##

wherein: R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, R.sup.8, R.sup.9, and R.sup.10 are independently selected from (i) hydrogen atom (H), (ii) alkyl groups (R) containing 1-3 carbon atoms and optionally substituted with one or more fluorine atoms, (iii) (CH.sub.2).sub.n(OCH.sub.2CH.sub.2).sub.mX groups, (iv) OR groups, (v) NR.sub.2 groups, (vi) NHC(O)R, (vii) C(O)R groups, (viii) halogen atoms, (ix) NO.sub.2 groups, and (x) CN groups, wherein R groups are independently selected from hydrogen atom (H); alkyl groups (R) containing 1-3 carbon atoms; and groups of the formula (CH.sub.2).sub.n(OCH.sub.2CH.sub.2).sub.mX, wherein n is 0 or an integer of 1-3, m is 0 or an integer of 1-12, and X is H, OH, OCH.sub.3, or OCH.sub.2CH.sub.3. Also described herein are methods for selectively capturing carbon dioxide (CO.sub.2) from a liquid source by use of the above compound.

A device for gas purification treatment may include: a light oxidation reactor, a light source being disposed in the light oxidation reactor, the light source being configured to emit first light and second light, the light oxidation reactor being configured to perform a first-stage purification treatment on a gas under irradiation of the first light; a catalytic ozone oxidation reactor configured for second-stage purification treatment of the gas; a photocatalytic reactor configured to perform a third-stage purification treatment on the gas under irradiation of the second light; wherein, the photocatalytic reactor is adjacent to the light oxide reactor, and the photocatalytic reactor and the light oxide reactor are separated by a light transmittance component, so that the second light passes through the light transmittance component into the photocatalytic reactor.