64 results about "Gallium nitrate" patented technology

The invention discloses a method for synthesizing GaOOH and beta-Ga2O3 materials with relatively good crystal quality and relatively uniform phase by taking gallium nitrate as a gallium source through a hydrothermal method and high-temperature calcination treatment, and characterizing the GaOOH and beta-Ga2O3 materials. The hydrothermal method adopted by the method has the advantages of simplicity in operation, low cost and the like, and has great advantages in the aspect of synthesizing gallium oxide. And compared with the traditional methods such as CVD (Chemical Vapor Deposition) and the like, which need to introduce noble metal elements as catalysts, easily cause reduction of material crystal quality and introduce unnecessary impurity elements, the method disclosed by the invention can be used for synthesizing the gallium oxide material with relatively good crystal quality and relatively uniform phase by combining a hydrothermal method and high-temperature calcination treatment. GaOOH powder is synthesized by adding an anionic surfactant sodium dodecyl benzene sulfonate (SDBS) solution with different concentrations, and then the GaOOH powder is calcined at the high temperature of 900 DEG C to obtain beta-Ga2O3 materials with different sizes.

The invention discloses gallium ion-quercetin coordination nanoparticles (GQNPs) as well as a preparation method and application thereof, specifically, quercetin, gallium nitrate hydrate and polyvinylpyrrolidone are respectively dissolved in an absolute methanol solution to prepare a quercetin solution, a gallium nitrate hydrate solution and a polyvinylpyrrolidone solution; secondly, fully mixing the quercetin solution and the polyvinylpyrrolidone solution, dropwise adding the gallium nitrate hydrate solution, and rapidly changing the color of the mixed solution from faint yellow to orange yellow in the dropwise adding process; and finally, dialyzing the orange-yellow mixed solution to remove excessive gallium ions and polyvinylpyrrolidone, thereby finally obtaining the GQNPs. The prepared GQNPs and deferiprone show excellent treatment effects on cell and living body levels, are expected to be applied to treatment of Parkinson's disease through multi-dimensional anti-ferroptosis, do not show obvious toxic and side effects in the embodiment, and are expected to be applied to further preclinical research.

The invention belongs to the technical field of biomedical materials, and particularly relates to a long-acting antibacterial biomass orthopedic material and a preparation method thereof. The nutrient solution is prepared from the following raw materials: calcium nitrate tetrahydrate, ammonium dihydrogen phosphate, gallium nitrate, zinc nitrate hexahydrate, antibiotics, 2-methylimidazole, sulphobetaine methacrylate and a photoinitiator. A three-layer synergistic structure is constructed through a Ga-doped beta-tricalcium phosphate core / a pH-responsive ZIF-8 and antibiotic shell / a photocuring sulfobetaine (pSBMA) brush layer, and the process adopts three conventional continuous steps of water-phase coprecipitation, room-temperature self-assembly and room-temperature photocuring, so that a high-energy physical deposition or complex surface activation process is avoided; the interlayer compatibility and repeatability are ensured; the finally obtained biomass material realizes triple functions of adhesion barrier resistance, drug burst release and long-term ion antibiosis in a microscopic level, and maintains biocompatibility in a macroscopic level.

The invention provides a gallium nitrate modified Prussian blue nano composite material as well as a preparation method and application thereof, and the gallium nitrate modified Prussian blue nano composite material comprises Prussian blue nano particles and gallium nitrate loaded on the Prussian blue nano particles, according to the preparation method, gallium ions are loaded on the Prussian blue nanoparticles in an ion replacement manner. Through the synergistic effect of Prussian blue and gallium ions, the synergistic effect of photothermal therapy and ion release is achieved, damage to normal tissue or cells is avoided, the sterilization effect can be improved, the concentration needed for antibiosis is low, and meanwhile the good biocompatibility, antioxidant activity and spectrum sterilization effect are achieved.

The application discloses a residual oil hydrodemetallization catalyst and a preparation method thereof. The method comprises the following steps: (1) an acid aluminum salt aqueous solution, an alkaline aluminum salt aqueous solution and a kaolin suspension liquid containing a surfactant are subjected to a first reaction to obtain slurry I; (2) an alkaline solution is introduced into the slurry I of step (1) to perform a second reaction to obtain slurry II; (3) the slurry II obtained in step (2) is subjected to hydrothermal treatment with a gallium nitrate solution, and then washed and dried to obtain a gallium-containing macroporous silica-aluminum material; (4) the gallium-containing macroporous silica-aluminum material is mixed with a plasticizing agent and a cementing agent, and then kneaded into a shape, and then dried and calcined to obtain a catalyst carrier; and (5) the catalyst carrier of step (4) is impregnated with an active metal impregnation liquid containing an organic acid and an alcohol compound, and then dried and calcined to obtain the residual oil hydrodemetallization catalyst. The catalyst can improve the demetallization activity and use stability of the catalyst in a residual oil hydroprocessing process.

The invention relates to a preparation method of a PtGaGe alloy-loaded oxygen-doped carbon nanotube and application of the PtGaGe alloy-loaded oxygen-doped carbon nanotube in electro-catalytic oxygen reduction.The preparation method comprises the steps that firstly, the oxygen-doped carbon nanotube is prepared through a carboxylation method, and then platinum nitrate tetraammine, gallium nitrate and ammonium hexafluorogermanate are evenly mixed; the preparation method comprises the following steps: adding a PtGaGe alloy into an aqueous solution of an oxygen-doped carbon nanotube while continuously stirring, uniformly stirring at room temperature, freeze-drying, and roasting in a tubular furnace to finally realize successful loading of the PtGaGe alloy, thereby obtaining PtGaGe / OCNTs. As a novel preparation method, the trimetal alloy can be successfully prepared under the low-temperature condition, and the preparation method has the advantages of being simple in preparation process, mild in reaction condition, controllable in alloy variety and content and the like. According to the invention, the unique double p-d orbital hybridization characteristic in the ternary PtGaGe alloy is utilized, the electron structure of platinum is cooperatively regulated and controlled, the atom utilization rate and the catalytic efficiency of the ternary PtGaGe alloy are simultaneously improved, and the tradeoff relationship between activity and selectivity is successfully broken through.

The invention provides an aluminum powder / gallium nitrate lithium ion battery composite electrode material and a preparation method thereof. The preparation method comprises the following specific steps: weighing aluminum powder (1-3 m), acetylene black, gallium nitrate and a polyvinylidene fluoride solution (PVDF is dissolved in N-methyl pyrrolidone, and the mass concentration is 0.01-0.03 g / mL) in proportion, and uniformly mixing the materials in a small glass bottle with the volume of 10 mL according to a certain method; and uniformly coating a copper foil fixed by a coating machine with the slurry by using a glass rod, transferring the copper foil to a vacuum oven, drying for 7-10 hours at the temperature of 60-80 DEG C under the pressure of-1-0.1 MPa, and cutting the copper foil into wafers with the diameter of 14 mm for later use by using a slicing machine after drying is completed, thereby obtaining the electrode plate loaded with the aluminum powder and gallium nitrate composite material. The prepared aluminum powder / gallium nitrate composite material has high reaction activity and high lithium storage capacity (the capacity provided by the aluminum powder is about 400 mAh g <-1 > and 0.2 A g <-1 >), the important application value is shown, the preparation method is simple, and the aluminum powder / gallium nitrate composite material has the important application value in lithium ion batteries.

The invention belongs to the technical field of photocatalytic materials, and particularly relates to a manganese ferrite / zinc gallate heterojunction photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: 1) dissolving zinc acetate and gallium nitrate hydrate in deionized water, then adding citric acid monohydrate, and obtaining zinc gallate by using a sol-gel method; 2) dissolving ferric chloride hexahydrate and manganese chloride tetrahydrate in deionized water, then adding a sodium hydroxide solution, and obtaining manganese ferrite by using a hydrothermal method; 3, zinc gallate and manganese ferrite are dissolved in a methanol solution, and the manganese ferrite / zinc gallate heterojunction photocatalyst is obtained through a mechanical stirring method.By means of heterojunction formation, the activity of the manganese ferrite / zinc gallate for photocatalytic reduction of carbon dioxide can be greatly improved.

Described herein are new compositions comprising a combination of metal(loid)-based antimicrobials (MBAs) that are effective against bacterial biofilms. In embodiments the composition comprises a combination of metal(loid) selected from: a) at least two metals; and b) at least one metal and at least one metalloid. Examples of metal(s) and metalloid(s) useful in the combination include, silver nitrate, potassium tellurite, hydrogen tetrachloroaurate (III), nickel sulfate, copper (II) sulfate, aluminium sulfate, gallium nitrate, sodium selenite, and zinc sulfate. Some combinations are broad-spectrum while others are especially effective against bacterial biofilms resulting from the growth of Gram-negative bacteria or the growth of Gram-positive bacteria. The compositions may be used in methods for disruption and / or of removal of biofilm present on a surface, or for coating purposes thereby providing anti-biofilm activity to a surface.

This invention relates to a catalyst for the hydrogenation of carbon dioxide to methanol, its preparation method, and its application. The preparation method of the catalyst includes the following steps: (1) mixing an aqueous solution of zinc salt, zirconium salt, and gallium nitrate with an alkaline solution; aging; the mixing temperature is 65-85℃, the pH value is 8.2-11.5; the molar ratio of Zn to Zr is 0.15-1.0:1.0; (2) separating, drying, and calcining the aged product to obtain a catalyst precursor; (3) reducing the catalyst precursor to obtain a catalyst for the hydrogenation of carbon dioxide to methanol; the mass percentage of Ga in the catalyst is 1.0-2.0%. The technical problem to be solved is to provide a composite oxide catalyst of Ga, Zn, and Zr, in which the mass percentage of Ga is 1.0-2.0%. When used in the catalytic hydrogenation of carbon dioxide to methanol, it has a carbon dioxide conversion rate of 14.6-17.7% and a methanol selectivity of 80.1-83.6%, which is beneficial to the industrial-scale production of methanol by the hydrogenation of carbon dioxide.

The invention discloses a gallium metal organic framework material which is prepared by the following steps: (1) dissolving 2-aminoterephthalic acid and itaconic acid in an organic solvent to obtain a solution A; (2) dissolving gallium nitrate hydrate in an organic solvent to obtain a solution B containing gallium ions; and (3) mixing the solution A with the solution B, heating at 50-70 DEG C for 3-5 hours, centrifuging, collecting the precipitate, and purifying to obtain the product. Itaconic acid and 2-aminoterephthalic acid are combined as double ligands, gallium ions are used as metal nodes, the gallium metal organic framework material is jointly constructed, the technical problems that itaconic acid in a free form is short in biological half-life period and low in cellular uptake efficiency are solved, the itaconic acid and the gallium ions are coordinated to achieve anti-inflammatory and antibacterial effects, and the gallium metal organic framework material has good application prospects. The compound can remove planktonic bacteria, has strong anti-biofilm activity, and can be used for preparing drugs for treating suppurative arthritis.

The invention relates to the field of photocatalysts, in particular to a lanthanum oxycarbonate-gallium oxide composite photocatalyst for catalytic reduction of carbon dioxide and a preparation method thereof.The preparation method comprises the following steps that S1, sodium carbonate, sodium fluoride and lanthanum nitrate hexahydrate are dissolved in deionized water and stirred and mixed at the room temperature, then a hydrothermal reaction is conducted, and a precursor is obtained; after cooling, filtering, washing and drying in sequence to obtain a sodium lanthanum carbonate precursor; s2, weighing gallium nitrate, mixing with the sodium lanthanum carbonate precursor, grinding, and uniformly mixing to obtain a composite precursor; and S3, in a protective atmosphere, carrying out temperature programming treatment on the composite precursor, and naturally cooling to room temperature to obtain the lanthanum oxycarbonate-gallium oxide composite photocatalyst. The photocatalytic CO2 reduction performance of the composite photocatalyst prepared by the invention is superior to that of single lanthanum oxycarbonate and gallium oxide catalysts, and the composite photocatalyst shows excellent application potential.

The invention discloses a sewage treatment agent and a preparation method thereof, and relates to the field of sewage treatment agents. When the sewage treatment agent is prepared, ferroferric oxide and tetrabutyl titanate are evenly mixed and then grafted with 3-chloropropyltrimethoxysilane, and pre-modified magnetic titanium dioxide is obtained; the pre-modified magnetic titanium dioxide and N, N-bis (2-chloroethyl) propan-1-amine are subjected to a reaction, and modified magnetic titanium dioxide is obtained; the preparation method comprises the following steps: reacting gallium nitrate nonahydrate with 2-aminoterephthalic acid, soaking in methanol, and grafting 6-(1H-imidazole-2-yl) pyridylaldehyde for reaction to obtain modified MIL-68 (Ga); and reacting the modified magnetic titanium dioxide with the modified MIL-68 (Ga) to obtain the sewage treatment agent. The sewage treatment agent prepared by the invention has excellent photocatalytic degradation performance, heavy metal ion complexing performance and anion adsorption performance.

The application relates to the technical field of supported bimetallic catalyst preparation, in particular to an atomic-level dispersed Pt-Ga bimetallic catalyst and a preparation method and application thereof. The preparation method of the atomic-level dispersed Pt-Ga bimetallic catalyst comprises the following steps: mixing nano-alumina and a gallium nitrate ethanol solution, water-bath heating and stirring, and then evaporating the solvent; calcining the obtained precursor material, and then performing reduction oxidation treatment to obtain Ga / Al2O3; adding Ga / Al2O3 powder into a platinum acetylacetone ethanol solution, water-bath heating and stirring, and then evaporating the solvent; and calcining the obtained precursor material to obtain the atomic-level dispersed Pt-Ga bimetallic catalyst. The preparation method of the atomic-level dispersed Pt-Ga bimetallic catalyst provided by the application disperses the metal of the prepared catalyst at an atomic level, the atomic utilization rate is high, and the synergistic effect between the bimetals is greatly enhanced.

The present invention belongs to the technical field of sol preparation for environmentally friendly refractory materials, and discloses a liquid binder for environmentally friendly refractory materials and a preparation method thereof. The liquid binder is in a solid-liquid blended state, and is composed of a calcium gallium molybdenum composite sol, a small amount of calcium gallium molybdenum composite sol powder, and a certain proportion of sodium polyacrylate and triammine citrate, and is synthesized and prepared by a simple water bath heating process. The calcium gallium molybdenum composite sol uses calcium nitrate, gallium nitrate, and molybdenum nitrate as raw materials, and the prepared liquid binder is introduced into aluminate cement to enable the aluminate cement castable to have good construction performance, high early strength and simple curing process, and at the same time has excellent high temperature strength, slag resistance and thermal shock stability.

The invention relates to the technical field of immunologic adjuvants, in particular to a gallium-based immunologic adjuvant and a preparation method and application thereof.The gallium-based immunologic adjuvant is prepared from pure gallium, gallium ions (gallium nitrate), gallium oxide, gallium hydroxide and hydroxyl gallium oxide. The gallium-based immunologic adjuvant designed in the invention can make up for the obstacle of insufficient anticancer curative effect caused by shortage of efficient immunologic adjuvants, can realize high-yield adjuvant output at lower cost, and also can effectively avoid the problem of immunosuppression microenvironment such as insufficient immune cell infiltration. It is worth mentioning that under the same adjuvant dosage, the maturation effect of the gallium-based immunologic adjuvant on the dendritic cells is obviously higher than that of an aluminum salt control group, and it is indicated that the effect of the immunologic adjuvant is high, and the immunologic adjuvant has the possibility of replacing a traditional inorganic nano immunologic adjuvant. The preparation method of the novel gallium-based immunologic adjuvant provided by the invention provides possibility for more effectively, quickly and conveniently enhancing the immune response capability of an organism to an antigen or changing the immune response type.

A preparation method of a metal ion modified composite antibacterial hydrogel wound dressing belongs to the technical field of preparation of drug dressings, and comprises the following steps: by taking inulin as a raw material, carrying out oxidation reaction on hydroxyl on the inulin to obtain aldehyde group modified oxidized inulin; and activating the carboxyl on the gallic acid, so that the carboxyl is cross-linked with the amino on the carboxymethyl chitosan to obtain the gallic acid-carboxymethyl chitosan graft. The preparation method comprises the following steps: preparing oxidized inulin and a gallic acid-carboxymethyl chitosan graft into a precursor solution, and mixing the precursor solution with a gallium nitrate hydrate solution according to a certain proportion to form gallium ion doped oxidized inulin and polyphenol grafted carboxymethyl chitosan bi-component interpenetrating polymer network hydrogel in which metals are respectively dissolved in deionized water. The method is simple in synthesis method, environment-friendly and high in yield, and the synthesized hydrogel wound dressing has a relatively practical antibacterial prospect.

The invention belongs to the field of semiconductor materials, and discloses gallium oxide and a synthesis method thereof. The synthesis method comprises the following steps: introducing ammonia water into a gallium nitrate solution, and continuously stirring to obtain a white turbid liquid; aging the white turbid liquid, filtering and washing to obtain an intermediate product; and calcining the intermediate product to obtain solid particles which are gallium oxide. According to the synthesis method, gallium nitrate and ammonia water are used as core raw materials, additional additives and complex precursors are not needed, the impurity introduction risk can be greatly reduced, and the high purity of the product can be guaranteed by combining washing and calcining procedures; meanwhile, the process steps are simple, the operation conditions are mild and controllable, expensive special equipment is not needed, the production cost is low, the method is suitable for large-scale production, and a gallium oxide product with good dispersity and high crystallinity can be obtained after a precursor prepared through a precipitation method is calcined and crushed.

The present invention provides a Si-Ga nanomaterial catalyst and its preparation method and application, which belongs to the field of catalyst technology, comprising the following steps: stirring after mixing a tetraethyl orthosilicate solution with a structure directing agent (DMF), subsequently adding a gallium nitrate solution and continuing to stir, then continuing to add a rare earth compound solution and an ethylene glycol solution and continuing to stir the reaction, calcining after freeze-drying, and obtaining the Si-Ga nanomaterial catalyst. The present invention also discloses the Si-Ga nanomaterial catalyst prepared by the above-mentioned preparation method and its application in the catalytic synthesis of tert-dodecyl mercaptan. The catalyst provided by the present invention can make the reaction react in a wider reaction temperature (60°C to 200°C) window and under low pressure, and the tert-dodecyl mercaptan yield is greater than 85%, and the stability is not less than 800h, which is suitable for industrial production.

The invention discloses a transparent ceramic target material for heat dissipation of a vehicle-mounted OLED (Organic Light Emitting Diode) and a preparation method of the transparent ceramic target material, and belongs to the technical field of ceramic target materials. The preparation method comprises the following steps: firstly, enabling aluminum powder to generate AIN nano powder under the action of nitrogen, then dispersing the AIN nano powder into a solvent, sequentially adding gallium nitrate, zinc nitrate and acetylacetone, and treating after reaction to obtain AlN-coated GZO nano powder; gallium nitrate and zinc nitrate are dispersed in a solvent, a complexing agent and magnesium nitrate hexahydrate are added for dispersion, polyethylene glycol is added for a reaction, GZO-MgO composite sol is obtained, AlN-coated GZO nanopowder and the GZO-MgO composite sol are mixed, yttrium nitrate, tin tetrachloride, a binder and an ammonium polyacrylate aqueous solution are added, the mixture is stirred uniformly, and the GZO-MgO nanopowder is obtained. After the pH value is adjusted, ball milling, degassing treatment and sintering are conducted, and the transparent ceramic target material for vehicle-mounted OLED heat dissipation is obtained. The ceramic target material provided by the invention has the characteristics of high light transmittance, high electric conductivity and high heat conductivity, and can effectively prolong the service life of an OLED device.

The application belongs to the technical field of biomedical materials, and particularly relates to a long-acting antibacterial biomass orthopedic material and a preparation method thereof. The raw materials of the application comprise calcium nitrate tetrahydrate, ammonium dihydrogen phosphate, gallium nitrate, zinc nitrate hexahydrate, an antibiotic, 2-methylimidazole, sulfobetaine methacrylate and a photoinitiator. The application constructs a three-level synergistic structure through Ga-doped beta-tricalcium phosphate core / pH-responsive ZIF-8@antibiotic shell / photocured sulfobetaine (pSBMA) brush layer. The process adopts three continuous steps of aqueous coprecipitation, room temperature self-assembly and room temperature photocuring, avoids high-energy physical deposition or a complex surface activation process, and guarantees the compatibility and repeatability between layers. The final obtained biomass material realizes the triple functions of anti-adhesion barrier, drug burst release and long-term ion antibacterial on the micro level, and maintains biocompatibility on the macro level.

A UV photodetector based on amorphous In-doped Ga2O3 nanomaterials and a preparation method thereof belong to the field of UV photodetection technology. The UV photodetector is composed of a quartz substrate, an amorphous In-doped Ga2O3 nanomaterial photosensitive layer and an Au metal interdigital electrode. First, the quartz substrate is cleaned and dried, and then gallium nitrate nine hydrate, indium nitrate four hydrate, polyoxyethylene lauryl ether and citric acid are added to deionized water to obtain an In-doped Ga2O3 precursor solution; then the precursor solution is spin-coated on the quartz substrate, and after drying, substrate cooling and sintering, an amorphous In-doped Ga2O3 nanomaterial photosensitive layer is obtained; finally, after photolithography and magnetron sputtering, an Au metal interdigital electrode is obtained on the photosensitive layer; thus, a UV photodetector based on amorphous In-doped Ga2O3 nanomaterials with simple process, few steps, low cost and high response to UV light is prepared.

The invention discloses a preparation method of a thiosemicarbazone binuclear gallium coordination compound, which is mild in condition and easy to operate, and comprises the following steps: firstly, carrying out condensation reaction on a thiosemicarbazone compound and 2-methyl-1, 3-cyclohexanedione to generate a thiosemicarbazone product; and oxidizing reactive hydrogen, adding a gallium nitrate solution to generate a thiosemicarbazone binuclear gallium coordination compound, and determining the thiosemicarbazone binuclear gallium coordination compound as the metal organic MOFs material through an X-ray single crystal diffraction method and a powder X-ray diffraction (PXRD) test.

The invention provides a method for preparing hydroxyl gallium oxide in a short process, and belongs to the field of nonferrous metallurgy. The method comprises the following steps: dissolving gallium nitrate in deionized water to obtain a gallium nitrate solution with set concentration; placing the gallium nitrate solution under a high-power gravity field so that gallium nitrate in the gallium nitrate solution and deionized water are subjected to a conversion reaction to obtain a mixed solution containing hydroxyl gallium oxide; and carrying out solid-liquid separation and drying on the mixed solution to obtain the hydroxyl gallium oxide powder. Under the action of a high-power gravity field, the gallium nitrate aqueous solution is highly dispersed, highly turbulent, strongly mixed and rapidly updated in interface, and the reaction between gallium ions and water molecules is directly in an activated state, so that the reaction rate is promoted to be increased, and rapid and efficient conversion of hydroxyl gallium oxide is realized; meanwhile, water molecules are subjected to intense mutual collision and strong friction to generate a large amount of heat, so that the temperature of the system is quickly increased, and the heat intensity of the reaction is high, thereby improving the production efficiency of the hydroxyl gallium oxide.

The invention discloses a boric acid-based photosensitive molecule and a preparation method and application of a gallium ion compound of the boric acid-based photosensitive molecule, and belongs to the technical field of photodynamic antibiosis. The invention provides preparation and application of a compound TPB-Ga formed by TPB and gallium ions as an antibacterial agent, a compound with a structure as shown in a formula TTCPy, 4-(bromomethyl) phenylboronic acid and an organic solvent are mixed, the mixture is heated under a protective atmosphere for a reaction, the mixture is rapidly stirred into a gallium nitrate aqueous solution and ultrapure water mixture, TPB-Ga compound nanoparticles are obtained, and the TPB-Ga compound nanoparticles are used as the antibacterial agent. The method comprises the following steps: dissolving TPB-Ga in ultrapure water to obtain a TPB-Ga compound solution, preserving at 4 DEG C for later use, and finding that the compound has efficient reactive oxygen species (ROS) generation capability, good photodynamic sterilization effect and good biocompatibility through the antibacterial rate and the cell survival rate.

The invention discloses a preparation method of 6N-grade high-purity gallium oxide. The method comprises the following steps: directionally crystallizing and purifying a raw material metal gallium to obtain high-purity gallium; dissolving high-purity gallium in nitric acid, evaporating and concentrating, and crystallizing at low temperature to obtain gallium nitrate crystals; the preparation method comprises the following steps: dissolving gallium nitrate crystals in ultrapure water, and sequentially carrying out ammonia water neutralization and aging reaction to obtain a gallium oxide precursor solution; and filtering, washing, drying and calcining the gallium oxide precursor solution in sequence to obtain the gallium oxide photocatalyst. According to the method, directional crystallization and gallium nitrate recrystallization are effectively combined, so that the product purity is greatly improved, and the stability and continuity of product production are effectively ensured; according to the method, electrolysis and replacement with high-purity gallium at the grade of 5N or above are not needed, stable preparation of the 6N-grade gallium oxide can be achieved only through the 3-4N-grade metal gallium, and the problems that in the prior art, high-purity gallium is high in cost, and stable and continuous production is difficult are effectively solved.

This invention belongs to the field of photocatalytic materials technology, specifically relating to a zinc gallate / semi-metallic carbon nitride heterojunction photocatalyst, its preparation method, and its application. The mass ratio of zinc gallate to semi-metallic carbon nitride heterojunction photocatalyst is 1:2 to 2:1. The preparation method includes: dissolving zinc acetate and gallium nitrate hydrate in deionized water, then adding citric acid monohydrate, and obtaining zinc gallate using a sol-gel method; dissolving sodium tricyanamide and 1-butyl-3-methylimidazolium chloride in water, and obtaining semi-metallic carbon nitride using a thermal polymerization method; and dissolving zinc gallate and semi-metallic carbon nitride in a deionized aqueous solution, and obtaining the zinc gallate / semi-metallic carbon nitride heterojunction photocatalyst using a hydrothermal method. The formation of the heterojunction can significantly improve the photocatalytic reduction activity of carbon dioxide by zinc gallate / semi-metallic carbon nitride.

The invention discloses a method for preparing a gallium-doped hollow ZSM-5 molecular sieve through microwaves and application of the gallium-doped hollow ZSM-5 molecular sieve, and relates to the technical field of molecular sieve catalyst preparation. The preparation method comprises the following steps: mixing a silicon source, a template agent and deionized water, stirring to prepare a precursor, transferring the precursor into a digestion tank, carrying out microwave hydrothermal treatment, and roasting in a muffle furnace to remove the template agent to obtain a pure silicon molecular sieve; the method comprises the following steps: taking a pure silicon molecular sieve, adding an aluminum source, a template agent and deionized water, carrying out ultrasonic treatment, transferring into a digestion tank, carrying out microwave hydrothermal and dissolution-recrystallization, and roasting the obtained product in a muffle furnace to remove the template agent so as to obtain a hollow ZSM-5 molecular sieve; the method comprises the following steps: taking a hollow ZSM-5 molecular sieve, adding gallium nitrate and deionized water, carrying out ultrasonic treatment, transferring into a digestion tank, and carrying out gallium doping under microwave irradiation; and putting the dried product into a tubular furnace, and carrying out heat preservation in an argon atmosphere at 200-300 DEG C to obtain the gallium-doped hollow ZSM-5 molecular sieve. The microwave hydrothermal process and the dissolution-recrystallization process are combined, so that the preparation time of the hollow ZSM-5 molecular sieve is effectively shortened, and the energy consumption is reduced.

The application provides a boron and metal double-doped modified ruthenium oxide anode catalyst, a preparation method and application thereof, and belongs to the technical field of new energy materials and electrochemical catalysis. First, urea and glucose are dissolved in deionized water as a structure directing agent, and then boric acid, ruthenium chloride and hydrated gallium nitrate are added; the mixture is stirred at room temperature until dissolved; a gel solid precursor is obtained by using a hydrothermal method; after washing treatment and vacuum drying, the precursor is subjected to heat treatment in an atmosphere to obtain a boron and metal double-doped ruthenium oxide electrocatalyst. The synthesis process is simple and easy to implement; the boron and metal doping modification not only reduces the loading amount of the noble metal ruthenium, but also improves the activity and stability of the catalyst, thereby providing a good idea for double-element doped ruthenium oxide and having industrial application potential.

The invention relates to the technical field of catalysts, in particular to a gold-based catalyst for preparing vinyl chloride and a preparation method of the gold-based catalyst, which are particularly suitable for an acetylene hydrochlorination reaction system in industrial production of polyvinyl chloride. The gold-based catalyst is prepared from the following raw materials in percentage by mass: 0.05%-1.0% of an active component HAuCl44H2O, 0.5%-5.0% of a cocatalyst and 0.05%-0.5% of a functional intermediate product I, wherein the functional intermediate product I is generated by carrying out hydrothermal reaction on sodium telluride, sodium dihydrogen phosphate and tetrabutyl titanate according to a molar ratio of 1: (0.5-2): (0.2-1); 0.1%-1.0% of a functional intermediate product II, wherein the functional intermediate product II is generated by reaction of gallium nitrate, indium nitrate and zirconium oxychloride according to a molar ratio of 1: (0.3-1): (0.2-0.8); 0.1%-0.8% of a nano zinc oxide-graphene composite dispersant; the balance is a composite modified activated carbon carrier.