11results about How to "Improve hydrogen production performance" patented technology

The invention relates to an interface engineering method of Zn0. 5Cd0. 5S loaded on a high-entropy sulfide cocatalyst and an application of the Zn0. 5Cd0. 5S. According to the method, firstly, a high-entropy sulfide FeCoNiCrAlSx (HES) is synthesized by adopting a solvothermal method, then the high-entropy sulfide HES is introduced into a Zn0. 5Cd0. 5S system through a one-step coprecipitation method, a compact interface is formed between FeCoNiCrAlSx and Zn0. 5Cd0. 5S, and meanwhile, FeCoNiCrAlSx provides abundant active sites. The obtained composite material can promote effective separation and transfer of photo-induced electron holes, the photocatalytic hydrogen production activity of Zn0. 5Cd0. 5S is remarkably improved, and new possibility is provided for designing an efficient and stable non-noble metal photocatalytic system.

The invention belongs to the field of preparation of photoelectric catalytic materials, and discloses a zirconium-based MOFs composite material loaded with carbon nitride quantum dots as well as a preparation method and application of the zirconium-based MOFs composite material. The composite material is prepared by adopting a solid phase method, and the method is simple, low in cost, easy to amplify, free of toxic solvents and environmentally friendly. The zirconium-based MOFs composite material loaded with the carbon nitride quantum dots prepared by the invention retains the advantages of large specific surface area and rich pore structure of the MOFs material, and shows excellent hydrogen production performance when the zirconium-based MOFs composite material loaded with the carbon nitride quantum dots is used as a photoelectrode material for hydrogen production by photoelectrocatalytic decomposition of water.

This invention discloses a three-armed cadmium sulfide nanorod photocatalyst, comprising: three-armed cadmium sulfide nanorods, molybdenum disulfide, and iridium disulfide; wherein each of the three tips of the three-armed cadmium sulfide nanorods is loaded with molybdenum disulfide and iridium disulfide. This photocatalyst is obtained by mixing the three-armed cadmium sulfide nanorods with iridium chloride and sodium molybdate in a solvent, followed by a hydrothermal reaction. This invention achieves efficient separation of photogenerated electron-hole pairs and improves photocatalytic performance by successfully loading molybdenum disulfide and iridium disulfide nanoflower-like co-catalysts onto the tips of the three-armed cadmium sulfide nanorods.

This invention relates to the field of nanoscale full-spectrum photocatalytic materials, and particularly to a method for preparing a molybdenum selenide / oxygen-deficient bismuth oxybromine@gold three-phase Z-type heterojunction photocatalyst. This method solves the problems of low photogenerated electron-hole separation efficiency, narrow full-spectrum response range, and poor stability in existing bismuth-based photocatalysts. The preparation method involves first preparing oxygen-deficient BiOBr nanospheres via a solvothermal method, then directly reacting tetrachloroauric acid with oleylamine in toluene to prepare small-particle-size monodisperse Au nanoparticles, which are then combined with oxygen-deficient BiOBr to prepare a BiOBr@Au nanosphere core-shell structure. Finally, a MoSe2 / oxygen-deficient BiOBr@Au three-phase composite material is prepared via a hydrothermal reaction. The catalyst of this invention exhibits absorption capacity under the full spectrum of light, and simultaneously achieves a synergistic enhancement of carrier separation efficiency and strong redox capability, demonstrating excellent photocatalytic activity and the ability to efficiently degrade pollutants and produce hydrogen.

This invention discloses a Zn-coordinated sulfur interstitial Zn x Cd 1‑x Preparation method and application of S crystal materials. This invention is the first to use alkaline ammonia gas to prepare Zn crystal materials. x Cd 1‑x In S crystal materials, sulfur interstitial material is selectively coordinated around Zn to obtain Zn-site coordinated sulfur interstitial material. x Cd 1‑x S crystal material. Zn prepared according to this invention. x Cd 1‑x S-crystal materials, due to their unique coordination structure and composition, possess highly efficient reactivity and can serve as efficient photocatalysts for hydrogen production. The preparation method of this invention is simple, controllable, low-cost, and uses readily available raw materials, making it suitable for large-scale production.

The application discloses a vanadium salt hetero-support and a preparation method and application thereof, and belongs to the field of material preparation and catalysis technology. The vanadium oxide-vanadium carbide hetero-support is prepared by a precursor method, vanadium salt is uniformly mixed with an organic carbon source, stirring and dissolving are conducted, drying and filtering are conducted, and a vanadium oxide-vanadium carbide hetero-support precursor is obtained, and the precursor is calcined in an argon or nitrogen atmosphere to obtain the vanadium salt hetero-support. The raw material used is low in price, the process is simple, no flammable and explosive gas is generated in the calcination process, the safety factor is high, the target product is generated by one-step calcination, impurities are not easily introduced, and the repeatability is high. The method is based on the theory of strong and weak metal carrier interaction, and a two-component vanadium salt hetero-support is used as a catalyst base, the catalyst sintering problem caused by Ostwald ripening, particle aggregation and migration is overcome, and thus a catalyst with good stability and good catalytic performance is obtained.

This invention belongs to the field of photocatalysis and discloses a hollow Cu 2‑x S@CuCo2S4 core-shell structured materials, their preparation methods, and applications. The above-mentioned hollow Cu... 2‑x S@CuCo2S4 core-shell structure material includes hollow Cu 2‑x S, and through hydrothermal reaction in hollow Cu 2‑x In-situ grown nanoflower CuCo2S4 layers on S. The preparation method includes: ultrasonically dispersing Cu2O in water, then adding Na2S·9H2O, and reacting to obtain Cu2O@Cu. 2‑x S; Cu2O@Cu 2‑x S acid etching yields hollow Cu 2‑x S; hollow Cu 2‑x S is dispersed in water, and cobalt chloride, copper chloride, thiourea, and ethylene glycol are added. After a hydrothermal reaction, hollow Cu is obtained. 2‑ x S@CuCo2S4 core-shell structured material. This core-shell material, when used as a photocatalyst in photocatalytic water splitting for hydrogen production, exhibits high hydrogen production capacity and good cycle stability.

The application belongs to the technical field of sewage treatment, and specifically discloses a biological membrane reactor for a sewage treatment system and hydrogen production, which comprises an ascending bed and a descending bed, the outlet end of the ascending bed is connected with the descending bed through a first reactor which is downwardly inclined, the outlet end of the descending bed is connected with the ascending bed through a second reactor which is upwardly inclined, and a circulating loop is formed, the flow direction of which is the ascending bed, the first reactor, the descending bed and the second reactor in sequence. The biological membrane reactor for the sewage treatment system and hydrogen production is used to optimize the hydrogen production performance of chemical substances in sewage by means of an external voltage, regulation and control of a fluid circulation path and fluidization speed, so that sewage purification and long-acting and stable production of biological hydrogen are simultaneously realized.

The application relates to the technical field of formic acid hydrogen production catalysts, in particular to application of a molybdenum carbide catalyst in formic acid hydrogen production. The molybdenum carbide catalyst is prepared by mixing, drying and then pyrolyzing ammonium molybdate tetrahydrate, citric acid and water under a protective atmosphere, and the preparation method is simple, and the raw materials are cheap and easy to obtain. When the molybdenum carbide catalyst is used to catalyze the formic acid hydrogen production reaction, the required reaction temperature is low, the hydrogen production rate is excellent, the stability is good, and the hydrogen production performance is good.

The invention discloses an electrolytic hydrogen production system which comprises a hydrogen production module, a total electrolyte tank, a first electrolyte tank and a second electrolyte tank, the hydrogen production module comprises a front end plate and a rear end plate, a plurality of anode plate assemblies and cathode plate assemblies are arranged between the front end plate and the rear end plate at intervals, and meanwhile, the total electrolyte tank is connected with the first electrolyte tank and the second electrolyte tank. A diaphragm piece is arranged between each adjacent anode plate assembly and cathode plate assembly, and the front end plate, the rear end plate, all the anode plate assemblies, all the cathode plate assemblies and all the diaphragm pieces press against one another and are fixedly connected through a plurality of bolts; the electrolyte at the position of the anode plate and the electrolyte at the position of the cathode plate can circularly flow, and the two electrolytes cannot be mixed, so that oxygen and hydrogen in the two electrolytes cannot be mixed, the exhaust purity of the hydrogen and the oxygen is high, the manufacturing is simple, the cost is low, and the application range is wide. A plurality of anode plates and cathode plates are arranged at intervals, so that rapid reaction is realized.

The application discloses a kind of double-vacancy ZnCdS solid solution photocatalyst and its preparation method and application, preparation method includes adding cadmium source, zinc source and sulfur source into anhydrous ethanol and stirring dissolution, the mass ratio of cadmium source, zinc source, sulfur source is 1:9:3, under the condition of 70~90 ℃ water bath reaction, after suction filtration, washing, drying, obtain powdery ZnCdS solid solution, NaOH is added to water and stirred and dissolved, then add powdery ZnCdS solid solution, again ultrasonic treatment, after suction filtration, washing, drying, obtain double-vacancy ZnCdS solid solution photocatalyst.The preparation method of the application has the advantages of high hydrogen production rate, good repeatability, simple preparation, low cost, etc., the obtained double-vacancy ZnCdS solid solution photocatalyst can be applied to the field of photocatalytic hydrogen production, and the hydrogen production efficiency is as high as 12.69mmol·g ‑1 ·h ‑1 , which is 23.94 times that of pure ZnS and 11.64 times that of pure CdS.