75 results about "Artificial photosynthesis" patented technology

The invention discloses a method or electric field-induced conversion of water and CO2 to an organic polymer. The method is characterized in that the method comprises the following steps: dissociating water by using the induction effect of an electric field with water and CO2 as base raw materials and an electric field induced reactor as a reaction device to generate hydrogen free radicals and hydroxy free radicals; converting the hydroxy free radicals with transition metal ions as a catalyst to form water and oxygen; and reacting water with CO2 in an aqueous solution system to generate carbonic acid, reacting carbonic acid with the hydrogen free radicals to generate oxalic acid, and continuously reacting oxalic acid and its derivative with the hydrogen free radical reaction to generate the organic polymer. The method can substantially improve the production efficiency and rate of the hydrogen free radicals, generates a large quantity of the hydrogen free radicals, greatly improves the artificial photosynthesis efficiency, and promotes the synthesis of carbohydrate and the organic polymer with complex structure.

Relating to a preparation method of graphite phase carbon nitride and application thereof, the invention provides a preparation method of crumpled graphite phase carbon nitride and application thereof. The invention aims to solve the technical problem of low activity of graphite phase carbon nitride used as a carrier for photocatalysis of formic acid to produce hydrogen at present. The preparation method includes: 1. mixing of melamine with glyoxal, and condensation reflux; 2. sintering; and 3. pickling, condensation reflux and centrifugation. The crumpled graphite phase carbon nitride prepared by the method provided by the invention can be used as a catalyst carrier. The invention employs a simple thermal decomposition method to synthesize the crumpled graphite phase carbon nitride catalyst carrier, the crumpled graphite phase carbon nitride not only maintains the photocatalytic performance of the graphite phase carbon nitride material itself, and also can be used as the catalyst carrier to improve the photocatalytic performance of the catalyst. The method has the characteristics of simple preparation and low raw material cost, and is easy for industrial production. The obtained crumpled graphite phase carbon nitride has potential application value in the fields of photolysis of water, artificial photosynthesis, organic pollutant degradation, carbon dioxide reduction, catalyst carriers and the like.

The invention discloses a three-dimensional flower-sheet-shaped sulfur-indium-zinc micro-nanowire array as well as a preparation method and an application thereof. According to the preparation method, a pretreated zinc sheet is taken as a substrate, an indium source and a sulfur source are taken as precursors, the temperature and time of solvothermal reaction are controlled, and therefore, the ZnIn2S4 micro-nanowire array is prepared. The three-dimensional flower-sheet-shaped sulfur-indium-zinc micro-nanowire array prepared by virtue of the preparation method is initiated from a solid substrate and has the excellent characteristics of high specific surface area, low reflectivity, good light trapping property, relatively few defects, capability in repeated use and the like; and the preparation method is simple, low in cost and non-toxic and environment-friendly and has huge application prospects in the fields of photocatalytic hydrogen generation, photocatalytic degradation of organic pollutants, artificial photosynthesis, photocatalytic sterilization, solar cells and the like, and the process is easily controlled.

The present invention generally relates to artificial photosystems and methods of their use, for example in artificial photosynthesis, wherein the artificial photosystems comprise one or more light-harvesting antenna (LHA) comprising a conjugated polyelectrolyte (CPE) complex (CPEC) comprising a donor CPE and an acceptor CPE, wherein the donor CPE and acceptor CPE are an electronic energy transfer (EET) donor/acceptor pair.

The present invention relates generally to reduction of atmospheric carbon dioxide and to fuel production, and more specifically, to carbonaceous fuel production by means of utilization of atmospheric carbon dioxide and water by “artificial photosynthesis”, as defined herein and methods of operation thereof.

The invention discloses an electrochemical preparation method of a BiOBr/Bi12SiO20 composite film photocatalyst and application of the BiOBr/Bi12SiO20 composite film photocatalyst, belonging to the fields of in-situ preparation of Bi-based composite materials, solar photocatalyst immobilization technology and artificial photosynthesis. The problems that existing synthesis methods are high in energy consumption and have difficulty in separation of powder catalysts from reaction systems can be solved. According to the invention, a BiOBr/Bi12SiO20 immobilized composite film is through one-step electrochemical synthesis at room temperature with a Bi plate, NaBr and Na2SiO3.9H2O as raw materials, water/EG as a solvent, nitric acid or a sodium hydroxide solution as an agent for adjusting a pH value and a Ti plate as a negative pole. The preparation method has the advantages of usage of cheap and easily available raw materials, no need for high temperature and high pressure, mild and controllable reaction conditions, easy operation, environment-friendly process, and no generation of harmful byproducts.

The invention relates to a preparation method of a Bi/Cu catalyst for artificial photosynthesis, which comprises the following steps of preparing an electrodeposition solution: adding bismuth chlorideBiCl3 and sodium citrate C6H9Na3O9 into a hydrochloric acid solution with the concentration of 1 mol/L or above, and sufficiently stirring the solution until the BiCl3 is completely dissolved and thesolution is transparent, thereby obtaining the electrodeposition solution, and electro-deposition reaction: forming a pair of electrodes by taking foamy copper as a cathode and a carbon rod as an anode, then immersing the electrodes into the prepared electrodeposition solution, carrying out constant-potential deposition reaction, and depositing 3-6 C charge quantity to obtain the Bi/Cu catalyst.Due to the fact that replacement reaction occurs under the acidic condition, Cu on the surface of the copper substrate is replaced into a solution and then deposited on the substrate again, and the coralline Bi/Cu catalyst with copper as a framework is formed. The Bi/Cu catalyst prepared through artificial photosynthesis has very high CO2 reduction selectivity.

Provided are a photocatalyst electrode, an artificial photosynthesis module, and an artificial photosynthesis device that have low electrical resistance, even in a case where the area is increased, in a case where a transparent conductive layer is used. The photocatalyst electrode is a photocatalyst electrode that has a substrate, a transparent conductive layer, a photocatalyst layer, and a linear metal electrical conductor, and splits water with light to produce a gas. The substrate, the transparent conductive layer, and the photocatalyst layer are laminated in this order, and the linear metal electrical conductor is in contact with the transparent conductive layer. The artificial photosynthesis module has the oxygen evolution electrode that splits the water with the light to produce oxygen, and a hydrogen evolution electrode that splits the water with the light to produce hydrogen. The oxygen evolution electrode and the hydrogen evolution electrode are disposed in series in a traveling direction of the light. At least one of the oxygen evolution electrode or the hydrogen evolution electrode has the configuration of the above-described photocatalyst electrode. The artificial photosynthesis device has the artificial photosynthesis module, and circulates and utilizes water.

An artificial photosynthesis module is used for decomposition of an electrolytic aqueous solution into hydrogen and oxygen by light. The artificial photosynthesis module has an oxygen generation electrode having a first protrusion and a first recess alternately arranged thereon, and a hydrogen generation electrode having a second protrusion and a second recess alternately arranged thereon. The hydrogen generation electrode and the oxygen generation electrode are in contact with the electrolytic aqueous solution, and at least one electrode of the hydrogen generation electrode or the oxygen generation electrode includes a conductive layer and a photocatalyst layer provided on the conductive layer. The hydrogen generation electrode and the oxygen generation electrode are arranged side by side, the second protrusion of the oxygen generation electrode faces the first recess of the hydrogen generation electrode in an arrangement direction, and the first protrusion faces the second recess in the arrangement direction.

The invention discloses a method for synthesizing N,N'-dialkyl oxalamide by using an artificial photosynthesis effect, and a derivative thereof. Under a condition of existence of a catalyst, organic amine and CO2 are synthesized to obtain the N,N'-dialkyl oxalamide and the derivative thereof. The method aims to provide the method for preparing the N,N'-dialkyl oxalamide by direct recycling utilization of flue gas carbon dioxide from a coal-fired power plant.

The invention provides a synthetic method of a biological structural carbon/cerium oxide artificial photosynthesis material. The synthetic method comprises the following steps: leaf pretreatment is carried out, plant leaves are soaked in mixed liquor of dilute hydrochloric acid, absolute ethyl alcohol and distilled water, then is taken out, is cleaned with the distilled water, and is soaked in the mixed liquor of dilute hydrochloric acid, absolute ethyl alcohol and the distilled water; a cerium solution is prepared, a pretreated leaf template is soaked in the cerium solution, is taken out, is washed with the distilled water, and is dried; the treated leaf template is calcined under nitrogen atmosphere protection, then is calcined in an air atmosphere, and is subjected to natural cooling, and the biological structural carbon/cerium oxide artificial photosynthesis material is obtained. The synthetic method of the biological structural carbon/cerium oxide artificial photosynthesis material adopts a relatively simple chemical technology, the reaction requires no complicated equipment, the varieties of required chemical raw materials are few, the cost is low, the experiment repeatability is good, the biological structural carbon/cerium oxide artificial photosynthesis material has very high photocatalysis value, a utilization ratio of visible light by the biological structural carbon/cerium oxide artificial photosynthesis material can be raised substantially, the effect of photocatalytically splitting of water into hydrogen of the biological structural carbon/cerium oxide artificial photosynthesis material under sunlight can be improved, and the biological structural carbon/cerium oxide artificial photosynthesis material has wide potential application value.

The invention discloses a gallium-nitride-based device for artificial photosynthesis. The gallium-nitride-based device comprises a glass substrate, a molybdenum layer, a CIGS (Copper-Indium-Gallium-Selenide) layer, a CdS layer, an intrinsic ZnO layer, a TCO layer, a bonding interface layer, a GaN layer, an InGaN layer and an NiO nanoparticle layer from bottom to top. The gallium-nitride-based device is prepared by the following steps: depositing the molybdenum layer on the glass substrate, performing coevaporation to grow the CIGS layer on the molybdenum layer, then depositing the CdS layer, the ZnO layer and the TCO layer in sequence; growing the InGaN layer on the GaN substrate; bonding the GaN substrate on the TCO layer by a bonding technology, then growing the NiO nanoparticle layer onthe surface of the InGaN layer and obtaining the gallium-nitride-based device for the artificial photosynthesis. The gallium-nitride-based device disclosed by the invention has the advantages of highabsorption coefficient, easy current regulation and high stability, can be used in the artificial photosynthesis as a photoanode material and plays a very important role in reducing carbon-dioxide emission and developing and utilizing new energy.

The invention discloses an artificial photosynthesis system and an application thereof. The artificial photosynthesis system comprises an artificial enzyme carrier, a light capture agent and an artificial enzyme, wherein the artificial enzyme comprises a coordination compound formed by metal ions and more than two nitrogen-atoms in melamine molecule in the artificial enzyme carrier. The artificial photosynthesis system contains 0.5-6wt% of melamine. The artificial photosynthesis system provided by the invention takes the melamine as the photosensitizer and the artificial enzyme carrier and the coordination compound formed between metal ions and nitrogen-atoms as the artificial enzyme, so that the selectivity of the photocatalytic reduction products to methyl alcohol is increased. The artificial photosynthesis system provided by the invention puts forward taking the semiconductor material ceric oxide coupling metal complex as the artificial enzyme for constructing a theoretical model for the artificial photosynthesis system, so that the applications of the semiconductor material CeO2 and melamine in the photocatalysis field are widened, the photocatalyst preparation process according to the invention is simple and the raw materials are low-cost and easily acquired.

A photocatalyst electrode decomposes water with light to generate gas. The photocatalyst electrode has a laminate including a substrate, a conductive layer provided on a surface of the substrate, and a photocatalyst layer provided on a surface of the conductive layer, and a first co-catalyst electrically connected to the photocatalyst layer. The light is incident from the surface side of the photocatalyst layer of the laminate, and in a case where a region where the light is incident on the surface of the photocatalyst layer and above the surface is defined as a first region and the region other than the first region is defined as a second region, the first co-catalyst is provided at least in the second region. The first co-catalyst and the photocatalyst layer are electrically connected to each other by at least one of a transparent conductive layer provided on the surface of the photocatalyst layer or a wiring line.

In an artificial photosynthesis module, a plurality of first electrode portions of a hydrogen generation electrode are disposed side by side with a gap, and each of a plurality of second electrode portions of an oxygen generation electrode is disposed at a gap between the first electrode portions of the hydrogen generation electrode as seen from the hydrogen generation electrode side with respect to the diaphragm. A first photocatalyst layer of at least one first electrode portion of the hydrogen generation electrode or a second photocatalyst layer of at least one of the second electrode portions of the oxygen generation electrode is tilted with respect to a flow direction of an electrolytic aqueous solution, or a projecting part is provided on a surface of the first photocatalyst layer of at least one first electrode portion of the hydrogen generation electrode or a surface of the second photocatalyst layer of at least one second electrode portion of the oxygen generation electrode.

An artificial photosynthesis module includes an oxygen generation electrode having a first photocatalyst layer that decomposes water with light to generate oxygen, and has a first substrate, a first conductive layer, a first photocatalyst layer, and a first co-catalyst, and a hydrogen generation electrode that decomposes water with light to generate hydrogen and has a second substrate, a second conductive layer, a second photocatalyst layer, and a second co-catalyst. This provides an artificial photosynthesis module with high reaction efficiency.

The invention relates to a carbon nitride composite material and a preparation method and application thereof in photosynthesis, and belongs to the technical field of environment and new energy materials. calcining a carbon-nitrogen compound twice to generate a graphite-phase carbon nitride nanosheet; and fully grinding the graphite-phase carbon nitride nanosheet and diimine pyromellitic acid, and calcining in inert gas to generate the diimine pyromellitic acid/graphite-phase carbon nitride composite material. The diimine phthalate/graphite-phase carbon nitride composite material disclosed by the invention is combined with the biological enzyme, and due to excellent visible light responsiveness, high carrier mobility, relatively high visible light utilization efficiency and specificity of the biological enzyme, the efficiency of catalytic production of formic acid is high, the product selectivity is good, and the material has a wide application prospect in the aspect of producing clean energy in artificial photosynthesis.

The invention relates to an artificial photosynthesis system and process used to neutralise harmful elements from any type of combustion, reducing the volume and initial pressure of the gases, by means of the kinetic energy produced by the accelerated recirculation of the gases according to the principle of molecular resonance or gas resonance, in order to then release oxygen and innocuous liquid substances by means of physical and chemical processes. Said system comprises a main chamber provided with a main gas inlet and a gas outflow tube, the main chamber comprising: a tube with nozzles arranged in the lower part of the main chamber enabling the passage of steam in the form of a steam curtain; a propeller; flexible tubes that protrude from the main chamber and connect to the main gas inlet; an electric motor for gas extraction, enabling the pressurised inflow of the gases towards the flexible tube; an evacuation duct connecting the main chamber to a secondary chamber that comprises an inlet tube for the gases from the main chamber and a gas outflow duct arranged in the upper end of the secondary chamber, the secondary chamber comprising: a plurality of connected units of plastic foam comprising a perforated sheet of aluminium at the connection points of each unit; a high-power centrifuge extractor outside the upper end of the secondary chamber; and tubes for ejecting the liquid residues, arranged in the lower part of the primary chamber and the secondary chamber.

The invention discloses a method for preparing ordered mesoporous strontium titanate. The method comprises the following steps: dissolving a nonionic surfactant, phenol-formaldehyde resin, tetrabutyl titanate, strontium acetate and concentrated hydrochloric acid in ethanol, carrying out stirring so as to obtain an orange solution, then, transferring the orange solution into a flat-bottomed vessel, carrying out solvent-induced self-assembly for at least 24 hours, and then, carrying out thermal polymerization for at least 12 hours at the temperature of 80 DEG C to 100 DEG C so as to form an orange film; and then, carrying out high-temperature heat treatment sequentially in an inert atmosphere and an air atmosphere, thereby obtaining a white ordered mesoporous strontium titanate film. The product prepared by the method is large in specific surface area, uniform in pore passage and high in orderliness and has a broad application prospect in the fields of photocatalytic degradation, photoelectrocatalytic water decomposition, artificial photosynthesis, photo-assisted energy storage batteries and the like.

The invention discloses a preparation method of a ZnIn2S4 nanosheet array film. The method comprises the following steps: firstly, depositing a layer of In2S3 nano film on FTO conductive glass by utilizing a chemical method; then sputtering a layer of zinc on the surface; finally, taking an indium source and a sulfide source as precursors, and controlling the heat reaction temperature and time ofa solvent to obtain a ZnIn2S4 nanosheet array. The prepared ZnIn2S4 nanosheet is of an ultrathin structure and is 5-6nm in thickness; the ZnIn2S4 nanosheet has high crystallizing performance, high trapping performance, recyclable performance and other outstanding properties; in addition, the method is simple in preparation; the process is easily controlled; the cost is low; the method is nontoxicand environmentally friendly and has huge application prospects in the fields such as the fields of photocatalytic hydrogen generation, organic pollutant photocatalytic degradation and artificial photosynthesis.

The present disclosure relates to a novel composite structure for artificial photosynthesis reaction and an integrated reaction device for artificial photosynthesis including the same, and a novel composite structure for water splitting reaction and an integrated reaction device for water splitting including the same.