34results about How to "Improve photolysis water efficiency" patented technology

The invention discloses a method for preparing a photoelectrode of a photoelectrochemical cell by supporting a co-catalyst on a semiconductor nanomaterial. A photo-anode with high property is prepared by supporting a nickel and cobalt hydroxide co-catalyst on a synthesized titanium oxide nanorod; according to a semiconductor photoanode prepared by the method, specific surface area of the electrode is effectively increased, the light trapping property of electrode materials is enhanced, and the full-contact area of the electrode materials and electrolyte is increased; meanwhile, compared with a traditional single semiconductor electrode, the photoelectrode disclosed by the invention has the characteristics that by introducing the co-catalyst, the reaction between holes and the electrolyte is effectively promoted, and the separation of electron hole pairs is improved, so that water photocatalytic efficiency is effectively improved; in addition, the method disclosed by the invention is relatively-simple in preparation process; raw materials are sufficient and are low in price, so that large-scale production is facilitated, and a huge potential application value is realized.

The invention discloses a method for synthesizing an Ag@Ag2S / TiO2 nanorod array. The specific steps are: (1) preparing a TiO2 nanorod array on an FTO conductive glass, (2) immersing the TiO2 nanorod array in a AgNO3 precursor solution And the Ag-modified TiO2 nanorod array was prepared by ultraviolet light irradiation; (3) The Ag-modified TiO2 nanorod array was immersed in the polysulfide solution dissolved in Na2S and S, and the Ag@Ag2S / TiO2 nanorod array was prepared by reaction. The present invention utilizes the synergistic effect of Ag and Ag2S to improve the material's absorption of visible light, improves the transmission and separation efficiency of photogenerated charges, and obtains a photoanode material with high photolysis water efficiency, and the synthesis method is simple in process and simplifies the construction of the electrode. The implementation process is conducive to mass production.

The invention relates to a method for preparing a ternary visible photocatalytic water splitting material with a biologically-grading porous structure. According to the preparation method, a biological multilayer three-dimensional fine structure is used as a template; by the design and preparation of a precursor solution and by the utilization of a penetration immersion method, different chemical reactivities of biochemical components is controlled and the ternary visible photocatalytic water splitting material with the biologically-grading porous structure is prepared through surface treatment and chemical modification. As the prepared catalyst has a special appearance, the catalytic performance is greatly raised. The ternary visible photocatalytic water splitting material with the biologically-grading porous structure has a wide application prospect in the aspects of organic matter pollution treatment, photocatalysis and water splitting.

The invention relates to the technical field of photocatalysis, and discloses a photocatalytic water splitting catalyzing structure. The photocatalytic water splitting catalyzing structure comprises a substrate, a conductive layer, a photocatalyst layer and covering layers, wherein the conductive layer is positioned on the upper surface of the substrate so as to form a conductive substrate; the photocatalyst layer is positioned on the upper surface of the conductive layer; the covering layers comprise an upper covering layer and a lower covering layer, the upper covering layer is positioned on the upper surface of the photocatalyst layer and covers part of the photocatalyst layer, and the lower covering layer is positioned on the lower surface of the substrate, and covers all the lower surface of the substrate. The invention also discloses a method for preparing the photocatalytic water splitting catalyzing structure. According to the invention, a high-temperature resisting conductive film is prepared on the substrate and can be flexibly applied to substrates of different types; the quantity of elements doped in the transparent conductive film can be accurately controlled; a photocatalyst precursor is synthesized by a hydrothermal method, the cost is relatively low, the operability is high, the pH value is adjusted by hydrochloric acid with proper concentration, and the technical problem that pure alpha-Fe2O3 is low in photocatalytic water splitting efficiency at present is solved.

The invention relates to a ferroelectric composite Cu2O visible light water photolysis hydrogen production photocathode and a preparing method thereof. The photocathode is sequentially composed of a BiFeO3 ferroelectric film layer, a gold nano-rod granular layer, a Cu2O film layer and a silicon wafer substrate from top to bottom, and heterojunctions are formed between the Cu2O film layer and the BiFeO3 ferroelectric film layer. According to the ferroelectric composite Cu2O visible light water photolysis hydrogen production photocathode and the preparing method of the photocathode, adverse effects of energy band barriers between the Cu2O film layer and the BiFeO3 ferroelectric film layer are eliminated through gold nano-rod granules by means of the LSPR effect, absorption of visible light with the wave length ranging from 650 nm-750 nm is strengthened, the Cu2O film layer is protected by the BiFeO3 ferroelectric film layer, residual polarization electric fields are used for eliminatingupwarp barriers on photoelectrode / electrolyte interfaces, the water photolysis efficiency and the hydrogen production efficiency are improved, the light current density reaches 91 microampere / cm<2>, and the threshold voltage relative to a reversible hydrogen electrode reaches 1.01 V.

The invention relates to a preparation method for a zinc-nickel-cobalt subcarbonate supported photoelectrode. The preparation method comprises the following steps that a layer of titanium oxide nanorod array is formed on the surface of a conductive substrate; zinc organic salt, nickel organic salt, cobalt organic salt and urea are mixed to be uniform in water, and a mixed solution is obtained; and the treated conductive substrate is immersed into the mixed solution, a reaction occurs at the temperature from 60 DEG C to 90 DEG C, and the zinc-nickel-cobalt subcarbonate supported photoelectrode is obtained. According to the preparation method, the process is simple, raw materials are sufficient, the cost is low, mass production is facilitated, and huge potential application value is achieved. According to the semiconductor photoelectrode prepared through the method, the specific area of the photoelectrode is effectively increased, and the area, making sufficient contact with an electrolyte, of the photoelectrode is increased; and meanwhile, compared with a traditional single-semiconductor electrode, the photoelectrode has the beneficial effects that the introduction of a co-catalyst effectively promotes holes and the electrolyte to react, electron hole pair separation is advantageously improved, and the photocatalytic water splitting efficiency is effectively improved.

The invention discloses an efficient and stable silicon-based photolysis water hydrogen production electrode and its preparation method and application, including a p-type silicon substrate, a cadmium sulfide heterojunction layer, a titanium oxide protective layer, and a platinum promoter; the preparation method mainly consists of a silicon substrate It consists of four steps: surface cleaning, cadmium sulfide layer deposition, titanium oxide layer deposition, and platinum additive loading. The invention effectively realizes the preparation of the heterojunction of silicon and cadmium sulfide, improves the photogenerated voltage, solves the problem that the silicon-based photocathode is unstable in aqueous solution, and improves the stability of the material. The preparation method of the invention has simple operation process, strong controllability, stable photoelectric catalytic performance and good repeatability.

The invention belongs to the technical field of photoelectrodes, which particularly relates to a preparation method of a nitrogen-doped titanium dioxide nano line electrode with visible light absorptivity. Concretely, a TiO2 nano line is prepared by utilizing an anodic oxidation method, is soaked in a hexamethylenetetramine solution, and is heated in a tubular furnace, nitrogen gas is used as carrier gas, and the nitrogen doping process is carried out. The TiO2 nano line is prepared by utilizing the anodic oxidation method, which enhances the specific surface area of TiO2 greatly, enhances the electronic transmission rate, promotes the effective separation of electron holes and reduces the probability of exciton recombination so as to increase the photocatalysis efficiency and the water photolysis efficiency of a photoelectrode; after the TiO2 nano line is doped by utilizing nitrogen, the absorption range of the TiO2 nano line to visible light is enhanced, and the water photolysis efficiency is reinforced; moreover, the process method has simple preparation and low cost, simplifies the execution process of the electrode and is beneficial to large-scale preparation and production; and the material has large application potential in the aspects of a solar battery, water-photolysis hydrogen production, photocatalysis degradation and the like.

The invention relates to a semiconductor composite heterojunction photoelectrode manufacturing method. A zinc oxide thin film with a thickness of 10 to 60 nm is deposited on a conductive base loaded with a bismuth vanadate nano thin film, and a zinc source and an oxygen source react under 150 to 200 DEG C to obtain the zinc oxide thin film; the conductive base after being processed is put to a copper salt aqueous solution, a replacement reaction is carried out under 60 to 100 DEG C, zinc oxide is converted into copper oxide, annealing is then carried out under 350 to 550 DEG C, and a conductive base loaded with a bismuth vanadate and copper oxide heterojunction is formed; and a titanium oxide thin film is deposited on the surface of the conductive base loaded with the bismuth vanadate andcopper oxide heterojunction, and a titanium source and an oxygen source react under 80 to 150 DEG C to obtain the titanium oxide thin film. The heterojunction has a petal-shaped appearance, the specific surface area of the electrode is increased, the loaded TiO2 is used as a promoter, a reaction between a hole and an electrolyte is promoted, and the water splitting efficiency is improved effectively.