34results about How to "Valence stable" patented technology

The invention discloses a near-infrared fluorescent powder with broadband emission characteristics, and a preparation method and applications thereof, and belongs to the technical field of luminescentmaterial. The near-infrared fluorescent powder with broadband emission characteristics is suitable for near ultraviolet light and blue light chip excitation. The general chemical formula of the near-infrared fluorescent powder is Ca<2+x>Ln<1-x-y>Zr<2-x>Al<3>O<12>:xCr<3+>, yCe<3+>, and Cr<3+> is taken as a luminescence center, wherein Ln is used for representing one or a plurality of ions selectedfrom Y<3+>, Lu<3+>, and Gd<3+>, x and y are used for representing molar fractions, 0<x<=0.15, and 0<=y<=0.1. The near-infrared fluorescent powder can be taken as a light conversion material of near ultraviolet light LED chips or blue light LED chips, can be used for preparation of broadband near-infrared light sources, and is capable of satisfying requirements of blood oxygen detection or coherence tomography on infrared light sources with broadband emission characteristics.

The invention provides ammonium ferrous phosphate as well as a preparation method and application thereof, the general formula of the ammonium ferrous phosphate is NH4FexM(1-x)PO4, and x is greater than 0 and less than or equal to 1; and M is selected from one or more of V, K, Co, Mn, Zn, Mg, Ni, Al, Ti, Nb, Zr and Cu. The invention also discloses a method for preparing lithium iron phosphate fromthe ammonium ferrous phosphate, and the method comprises the following steps: mixing ferrite, a phosphorus source and ammonia water, regulating the pH value of the reaction system to 6-7, and reacting to generate the ammonium ferrous phosphate, wherein the molar ratio of the ferrite to the phosphorus source is (0.95-1.03): (0.95-1.03); reducing and calcining the ammonium ferrous phosphate at hightemperature under inert atmosphere protection to obtain ferrous pyrophosphate; mixing the ferrous pyrophosphate with lithium salt and a carbon source, crushing and ball-milling; performing calciningand coating carbon, and synthesizing to obtain the lithium iron phosphate. The method is simple in production process, low in production precision requirement and easy to prepare and dope.

The invention discloses a chemical oil removal liquid suitable for aluminum alloy by utilizing anode oxidation waste sulfuric acid and an application of the chemical oil removal liquid. The oil removal liquid is composed of sulfuric acid, an emulsifier, a nonionic surfactant, an anionic surfactant, a builder, an oxidizing agent and a corrosion inhibitor. According to the chemical oil removal liquid, the waste sulfuric acid solution of the anodic oxidation production line is fully utilized to prepare the oil removal liquid medicine, the reutilization of the anode oxidation waste acid is realized, and the cost for producing acid washing oil removal and anode oxidation is saved. The oil removal liquid is free of phosphorus, nitrogen and the like, the wastewater treatment is simple, the eutrophication of the water body can be avoided after the water is discharged, and the environment-friendly performance is good.

The invention discloses a light-controllable metal ion delivery particle as well as a preparation method and application thereof. The light-controllable metal ion delivery particle comprises an organic micromolecular ligand and metal ions combined on the organic micromolecular ligand through coordination, and a chemical structural formula of the organic micromolecular ligand is shown in the specification, wherein R is one of methyl, ethyl and benzyl; and the metal ions are copper ions or cuprous ions. According to the light-controllable metal ion delivery particle, the organic micromolecular ligand can keep the valence state of the metal ions stable, and the metal ions are delivered to a tumor region through a nano self-assembly technology; besides, the organic micromolecular ligand also has the function of a photosensitizer, and the purpose of carrying out photodynamic therapy firstly and then carrying out chemodynamic therapy can be realized, so that accurate light-controlled ion release at the tumor region can be realized, and the toxicity of a whole body is reduced; and the novel drug delivery mode provides a new strategy for collaborative treatment of tumor.

The invention provides a ferrous ammonium phosphate, its preparation method and application, the general formula of ferrous ammonium phosphate is: NH 4 Fe x m (1‑x) PO 4 , wherein x=greater than 0 and less than or equal to 1; M is selected from one or more of V, K, Co, Mn, Zn, Mg, Ni, Al, Ti, Nb, Zr and Cu. The invention also discloses a method for preparing lithium iron phosphate from ferrous ammonium phosphate, which includes the following steps: mixing ferrous salt, phosphorus source and ammonia water, adjusting the pH of the reaction system to 6-7, and reacting to generate ferrous ammonium phosphate; the ferrous The molar ratio of the salt to the phosphorus source is 0.95-1.03:0.95-1.03; the ammonium ferrous phosphate is reduced and calcined at a high temperature under the protection of an inert atmosphere to obtain ferrous pyrophosphate; the ferrous pyrophosphate is mixed with lithium salt and carbon source, Crushing, ball milling; calcining, carbon coating, and synthesis to obtain lithium iron phosphate. The production process of the invention is simple, the production precision is low, and the preparation and doping are easy.

A catalyst including: a support, the support including a mixture of SiO2 and ZrO2; an active ingredient including copper; a first additive including a metal, an oxide thereof, or a combination thereof; and a second additive including Li, Na, K, or a combination thereof. The metal is Mg, Ca, Ba, Mn, Fe, Co, Zn, Mo, La, or Ce. Based on the total weight of the catalyst, the weight percentages of the different components are as follows: SiO2=50-90 wt. %; ZrO2=0.1-10 wt. %; copper=10-50 wt. %; the first additive=0.1-10 wt. %; and the second additive=0.1-5 wt. %.

The invention belongs to the technical field of nuclear fuel reprocessing and discloses a process for recovering and purifying neptunium from waste liquor discharged from 2AW+2DW in Purex flow. The process comprises the primary neptunium purification process and the secondary neptunium purification process; the process comprises the following steps: by taking 30 volume percent of TBP-kerosene as an extraction agent, extracting Np, U and Pu to the organic phase, and allowing the fission fragments to enter the aqueous phase; adding a reducing agent and an extraction agent into the organic phase, reversely extracting the Np to the aqueous phase; further extracting uranium and plutonium, and performing oxalate precipitation, filtering and calcining on the obtained aqueous phase product to obtain the purified neptunium oxide solid. The process has the advantages that the neptunium recovery rate is over 98 percent, and the uranium and plutonium removal coefficient in neptunium is high.

The invention relates to a rare-earth butyl rubber and a preparation method thereof. The rare-earth butyl rubber is a homopolymer prepared by using a rare-earth catalyst to catalyze isobutylene polymerization, or a copolymer prepared by catalyzing isobutylene-comonomer polymerization. The number-average molecular weight is 1-100*10<4>. The mol percent of the comonomer is 1-20%. The comonomer is selected from one or mixture of more of olefins and olefin derivatives, wherein the olefins are selected from alpha-olefins, conjugated olefins and cycloolefins; and the olefin derivatives are selected from alpha-olefin derivatives, conjugated olefin derivatives and cycloolefin derivatives containing nitrogen, oxygen, chlorine and bromine atom functional groups. The rare-earth catalyst comprises A and B, wherein A is rare-earth coordination compounds CpLnR2Xn, Ln is a rare-earth metal, and B is an organic boron reagent. The rare-earth catalyst has the advantages of high activity and stable valence state; the polymerization reaction can be competed at higher temperature; and thus, the method has the advantages of energy saving, high safety, long production cycle, no corrosion, no toxicity and environment friendliness.

The invention discloses an all-inorganic lead halide perovskite light-emitting diode, which comprises a conductive substrate, a carrier transport layer, an electrode modification layer and an electrode sequentially arranged in a layered structure, wherein the carrier transport layer is arranged in the middle The active luminescent layer is a lead halide perovskite in which part of the lead halide is replaced by an alkaline earth metal halide. In this application, part of the lead halide in the perovskite is replaced by alkaline earth metal. On the one hand, the formation energy of the bromine defect state in the perovskite becomes higher, which means that the bromine defect is more difficult to form, so the defect state of the perovskite is significantly reduced and the fluorescence is enhanced. On the other hand, the morphology of the film is significantly improved, the pores are reduced, and the leakage current is reduced. At the same time, due to the enhanced fluorescence, the brightness is improved, and finally the efficiency of the entire device is improved.

The invention relates to a high-performance perovskite cell and a preparation method thereof. The perovskite solar cell uses Fe prepared by a solution method. 2‑x Mg x O 3 The thin film is used as the interface passivation layer to passivate the adjacent interface of the perovskite photosensitive layer of the perovskite photovoltaic cell, where 0≤x≤0.2, and the thickness is 30-40 nm. The perovskite photovoltaic cell of the present invention uses Fe 2‑x Mg x O 3 For the interface passivation layer, the preparation cost of perovskite cells is greatly reduced, and the interaction between iron and iodine, oxygen and lead is used to improve the crystal quality of perovskite thin films. At the same time, Fe 2‑x Mg x O 3 The thin film can make the carriers move quickly and reduce the charge accumulation at the interface; an appropriate amount of magnesium can also form a strong chemical bond with the surrounding ions, stabilize the structure of the adjacent interface of the perovskite, reduce interface defects, and reduce non-radiative recombination. achieve the purpose of improving device performance.

The invention discloses a preparation method of an anode material of a lithium ion cell, comprising the following steps of: (1) uniformly dispersing a Li source, a Mn source, a Ni source, a doping element and a metal element with superionic conductor attributes to prepare a precursor, wherein the metal element with the superionic conductor attributes is selected from two or two more of Ti, La andZr; (2) drying or igniting the precursor, then carrying out pretreatment to obtain pretreatment powder; (3) pressing the pretreatment powder into a sheet; (4) carrying out heat treatment for 6-24h; and (5) annealing, naturally cooling to room temperature, grinding, and sieving to obtain the anode material. In the invention, on the one hand, a crystal skeleton of the material and a Mn valence state are stabilized by using the doping element, on the other hand, a compound lithium ion superionic conductor improves a migration rate of the lithium ion in the material and improves the multiplying power property and cycling property of an electrode are improved.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a preparation method and application for a vanadium trioxide negative electrode material. The preparation method for the vanadium trioxide negative electrode material comprises the steps that an ammonium vanadate compound is taken as a precusor substance, a silicon wafer is taken as a carrier, a lithium sheet is taken as a reducing agent, the above substances are placed in a crucible and is calcined in a tube furnace, the above substance is cooled to the indoor temperature naturally, and a V2O3 negative material is obtained. The preparation method is simple and feasible, the production cost is low, and the safety coefficient is high; the prepared V2O3 negative material is of a multi-level structure, and material shape can be controlled. In addition, the prepared V2O3 negative material is used for assembling a half cell, the result shows that the V2O3 negative material is high in specificcapacity, good in rate capability and stable in circular performance. The prepared V2O3 material is taken as the negative material to produce lithium ion batteries and has a wide application prospect.

The invention discloses a laminated magnetic conductive plate raw material composition and a production method for manufacturing a modified laminated magnetic conductive plate by utilizing the laminated magnetic conductive plate raw material composition. The laminated magnetic conductive plate raw material composition is a mixer of epoxy resin, iron powder, nano neodymium oxide and a silane coupling agent KH550, wherein the weight ratio of the epoxy resin, the iron powder, the nano neodymium oxide and the silane coupling agent KH550 is 10:2:0.5:0.13, and the proportion of the diluted epoxy resin is 50%. The problem that the iron powder in the laminated magnetic conductive plate on the market is large in proportion, easily precipitates in an epoxy resin solution and is difficult to evenly disperse, and accordingly the magnetic flow rate of the laminated magnetic conductive plate is unstable is solved. The problem that the iron powder is used for a long period of time or is easily oxidized after used in a high-temperature motor, and accordingly the magnetic conductance of the laminated magnetic conductive plate is reduced remarkably is solved.