8 results about "Gallium nitrate" patented technology

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.

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.

This invention discloses a method for preparing a reverse water-gas shift catalyst and its application, comprising the following steps: (1) dissolving tetrabutyl titanate, cerium nitrate, or gallium nitrate in water with ammonium molybdate, stirring until homogeneous, to prepare a mixed solution; (2) adding an organic acid to the mixed solution, stirring until homogeneous, and adjusting the pH of the solution; (3) heating the solution from step (2) until gelled, drying overnight, and then calcining to obtain the catalyst. This invention is the first to prepare a molybdenum-based bimetallic catalyst using the sol-gel method, which has the advantages of simple preparation steps, readily available raw materials, and safe operation. Furthermore, the catalyst obtained by this invention exhibits excellent CO2 conversion rate and nearly 100% CO selectivity.

The application discloses a kind of near-infrared long afterglow luminescent nano probes, its preparation method and application, belong to near-infrared long afterglow material field. With mesoporous silica as template, with zinc acetate, gallium nitrate, tin chloride, chromium acetate, chromium nitrate and yttrium nitrate as doped metal raw materials, long afterglow luminescent core is obtained by reaction and calcination;The outer layer of long afterglow luminescent core is coated with manganese dioxide, to obtain pre-product;Pre-product is surface modified, and coupling target molecule plerixafor, i.e. near-infrared long afterglow luminescent nano probe. The near-infrared long afterglow luminescent nano probe has good biological safety, can be effectively enriched in the tumor area in vivo after mouse tail vein injection, can realize high-sensitivity imaging of multiple small tumors in vivo under red light LED irradiation, and the imaging time is short, suitable for intraoperative imaging, can be used for the imaging of breast cancer tumor model to guide tumor resection.

This invention discloses a method for preparing Ga / Se dual-ion co-modified attapulgite and a corrosion-inhibiting multifunctional silk fibroin-based hydrogel coating. The preparation process is as follows: Attapulgite is activated and surface-modified with a hydrochloric acid solution of a certain concentration; gallium nitrate solution is added and the temperature is controlled; the reaction is carried out for a period of time to obtain Ga / Se dual-ion modified attapulgite; then, it is added to a silk fibroin aqueous solution of a certain mass fraction; subsequently, (1-hydroxyethylidene) bisphosphonic acid and glycine are added, mixed evenly, and coated onto a pretreated substrate, then dried at 37°C to form a film. Compared with the prior art, the hydrogel coating prepared by this invention has good corrosion inhibition, antibacterial, and osteogenic properties, and can be widely used in the surface protection of biomedical magnesium alloys and to impart multifunctionality to them.

This invention employs a co-precipitation method to prepare a copper-zinc-gallium catalyst. Specifically, copper nitrate trihydrate, zinc nitrate hexahydrate, and gallium nitrate hydrate are prepared into a metal salt solution, which is then added dropwise to a reaction vessel containing a base solution along with a precipitating alkaline solution. The co-precipitation reaction is carried out under heating, stirring, and pH control. The target catalyst is then obtained through aging, solid-liquid separation, and calcination. This invention overcomes the shortcomings of existing copper-zinc-based catalysts, such as low activity and easy sintering and deactivation, and improves the long-range stability of the catalyst.

The application discloses a gallium metal organic framework material, which is prepared through the following steps: (1) dissolving 2-amino terephthalic acid and itaconic acid in an organic solvent to obtain solution A; (2) dissolving gallium nitrate hydrate in an organic solvent to obtain solution B containing gallium ions; and (3) mixing solution A and solution B, heating under the condition of 50-70 DEG C for 3-5 hours, centrifuging and collecting the precipitate, and purifying to obtain the gallium metal organic framework material. The gallium metal organic framework material is constructed by combining itaconic acid and 2-amino terephthalic acid as a double ligand and taking gallium ions as a metal node, so that the technical problems of short biological half-life and low cell uptake efficiency of free itaconic acid are solved, the itaconic acid and the gallium ions are coordinated to play an anti-inflammatory and antibacterial role, to remove planktonic bacteria, and to have strong antibiofilm activity, and the gallium metal organic framework material can be used for preparing a drug for treating pyogenic arthritis.

The application provides a gallium atom iron site doped lithium manganese iron phosphate positive electrode material and a preparation method thereof, and belongs to the field of electrochemical energy storage. The specific process is as follows: gallium nitrate is added into a mixed solution of ethanol and glycerol, and then transferred into a hydrothermal reaction kettle for hydrothermal treatment to obtain a gallium atom ligand as a gallium source. Lithium carbonate is added into an 85% aqueous phosphoric acid solution for reaction, and then a manganese source, a carbon source, iron phosphate and the gallium source are added into the reaction solution one by one to form a mixed slurry. The mixed slurry is subjected to sand milling treatment, and then spray drying. The dried powder is subjected to fluidized sintering under the protection of an inert atmosphere, and finally a gallium atom iron site doped lithium manganese iron phosphate material is obtained. The gallium atom ligand as the gallium source makes the surface morphology of the obtained gallium doped lithium manganese iron phosphate material smoother, and the specific surface area is significantly reduced. The gallium doped lithium manganese iron phosphate material applied to a lithium ion battery positive electrode material exhibits excellent electrochemical performance.