132 results about "Solid phase reactions" patented technology

This invention discloses a high-entropy transition metal nitride ceramic material and its preparation method. The preparation method includes the following steps: mixing n kinds of transition metal nitride powders and m kinds of transition metal powders, vacuum drying to obtain a precursor; placing the precursor in a mold and performing pre-pressing treatment to obtain a pre-pressed sample; sintering the pre-pressed sample in a sealed environment at a temperature of 500–3500℃ and a pressure of 2–28 GPa to obtain the high-entropy transition metal nitride ceramic material; wherein n≥1, m≥0, and the total number of transition metal elements in the precursor is four or more. This invention improves the stability of the precursor and reduces the size and distance of particles within the precursor through two pressure treatments, achieving for the first time the synthesis of high-density, high-purity high-entropy transition metal nitride ceramic materials via solid-state reaction.

The invention discloses a SbBr co-doped argyrodite type solid electrolyte and a preparation method thereof.The preparation method comprises the steps that Li2S, LiCl, P2S5 and SbBr3 are weighed according to the stoichiometric ratio and then subjected to ball milling treatment, and mixed powder is obtained; the mixed powder obtained in the step S1 is subjected to compression molding and placed in a muffle furnace to be heated and calcined, and a solid-phase reaction is conducted; and after the reaction is finished, naturally cooling to room temperature, and grinding to obtain the SbBr co-doped argyrodite type solid electrolyte. According to the preparation process of the argyrodite type solid electrolyte, a traditional solid-phase sintering process is adopted, the synthesis process is simple, and the repeatability is high. The ionic conductivity of the argyrodite type solid electrolyte prepared by the process can reach 10.4 mScm <-1 > at room temperature. The argyrodite type solid electrolyte prepared by the invention has high ionic conductivity and excellent air stability, and meets the requirements of industrial large-scale production. When the solid-state electrolyte provided by the invention is assembled into an all-solid-state battery, the cycle life of the all-solid-state battery can be remarkably prolonged due to good compatibility with lithium metal.

The invention relates to the technical field of electrodes for vanadium batteries, in particular to a preparation method of a catalytically active electrode for a vanadium battery, the catalytically active electrode and application of the catalytically active electrode. The preparation method comprises the following steps: loading a bismuth oxide water-phase dispersion liquid as a precursor on the surface of a graphite felt electrode substrate, placing the graphite felt electrode in an inert atmosphere to carry out a carbon thermal reduction reaction, and carrying out a solid-phase reaction on bismuth oxide and the graphite felt carbon substrate in the inert atmosphere to generate a strongly combined catalytic active site in situ. By pertinently controlling the concentration of the bismuth oxide water-phase dispersion liquid and the temperature of the carbon thermal reduction reaction, active components in the prepared catalytic active electrode for the vanadium battery are uniformly and firmly combined on the surface of a matrix, and high uniformity and high stability are shown. And meanwhile, a loading-first and one-step carbon thermal reduction method is adopted, so that large-scale production can be realized, the electrochemical activity of the product is effectively improved, the uniformity and consistency of the performance can be realized, and the multi-dimensional strict requirements of commercial production on the electrode performance and the manufacturing efficiency are effectively met.

The application relates to a dual-phase high-entropy ceramic material for high-temperature thermal barrier coatings and a preparation method thereof, in particular to a dual-phase high-entropy ceramic (La 0.2 Nd 0.2 Gd 0.2 Y 0.2 Ho 0.2 )2Zr2O7 with low thermal conductivity and high thermal expansion coefficient, which is mainly used for thermal isolation, thermal barrier coatings and other applications in high-temperature environments. The application is prepared by adopting a solid-phase reaction sintering process through accurate design of the combination of rare earth elements, forms a stable dual-phase structure, effectively inhibits grain growth through grain boundary pinning, and thus maintains a nanoscale grain structure. Meanwhile, the material can efficiently block heat transfer at high temperatures through optimization of phase proportion, and the thermal expansion characteristics are matched with a metal base layer, effectively avoiding the falling risk caused by the difference in thermal expansion of the two, and thus greatly improving the service life and reliability of the material in a high-temperature environment. The high-entropy ceramic material of the application can be widely applied to fields with high demand for high-temperature thermal isolation in aerospace, aviation, automobile industry and the like, is especially suitable for thermal barrier coatings, high-temperature thermal insulation materials and other high-temperature thermal insulation applications, and has important engineering application value.

The invention relates to the technical field of molecular sieve synthesis and solid waste recycling, and particularly discloses a method for preparing an ITH type molecular sieve from silica gel waste through a ball-milling solid-phase crystallization method. The method comprises the following steps: mixing waste silica gel as a main silicon source with an aluminum source, an alkali source, an organic template agent and deionized water, directly carrying out mechanochemical activation and solid-phase reaction through high-energy ball milling without conventional hydrothermal crystallization, and then carrying out solid-phase crystallization at a relatively low temperature to finally obtain the ITH type molecular sieve with good crystallinity. According to the method, a ball-milling solid-phase crystallization method is applied to synthesis of the ITH type molecular sieve for the first time, and full-amount and high-value utilization of the silica gel waste is successfully realized. The method has the remarkable advantages of short process flow, no need of a large amount of solvent, low energy consumption, low cost and environmental friendliness, and opens up a new path for industrial low-cost preparation of the ITH type molecular sieve and green recovery of silica gel waste.

The application discloses a preparation method and system of sodium difluorophosphate. The preparation method of sodium difluorophosphate comprises the following steps: S100, in a water-free or low-water environment, a solid-phase reaction is generated between diphosphorus pentoxide and ammonium fluoride to obtain an ammonium difluorophosphate intermediate, and volatile substances generated in the reaction process are removed and recovered; S200, in a water-free organic solvent, the ammonium difluorophosphate intermediate obtained in the step S100 is reacted with a sodium salt to obtain sodium difluorophosphate. The preparation method of sodium difluorophosphate provided by the application uses diphosphorus pentoxide and ammonium fluoride as reaction raw materials to obtain an ammonium difluorophosphate intermediate, and then reacts to obtain sodium difluorophosphate. The obtained sodium difluorophosphate has high purity and few impurities. The preparation method of sodium difluorophosphate has the advantages of cheap and easily obtained raw materials, stable chemical properties, few by-products generated in the reaction, and easy recovery, and is a green and safe preparation method of sodium difluorophosphate.

The invention relates to a method in the technical field of inorganic materials, in particular to a method for preparing metal element doped hydroxyapatite through a high-temperature solid-phase method, a product prepared through the method and application of the product. Through two steps of high-temperature solid-phase reaction, metal-doped beta-tricalcium phosphate (beta-TCP) is synthesized in advance to serve as a reaction precursor, the metal-doped beta-tricalcium phosphate and calcium carbonate are subjected to solid-phase reaction at high temperature to generate metal-doped hydroxyapatite, the distribution uniformity of doped elements in a final hydroxyapatite product is guaranteed, and by controlling the temperature and time, the metal-doped hydroxyapatite is prepared. Generation of impure phases can be effectively inhibited, and doped hydroxyapatite with single phase composition is obtained. The method is simple in process, free of solvent and high in yield, metal ions with different functions can be flexibly introduced, directional regulation and control of functionality such as biological activity, mechanical property and antibacterial property of a final hydroxyapatite material are achieved, and a new way with great industrialization prospects is provided for large-scale and low-cost preparation of high-performance doped hydroxyapatite.

The invention discloses a process for dealkalizing and deeply reducing red mud through gradient temperature control treatment, which comprises the following steps: 1) accurately metering raw materials and grinding; 2) feeding the ground raw materials into a red mud stirrer, and stirring at a gradient rotating speed; 3) feeding the stirred and mixed raw materials into a granulator for granulation, and pressing the materials into particle materials with the particle size of 5-15mm; 4) feeding the particle material into a dealkalization solid-phase reaction device, and forming a particle material after a solid-phase reaction in a reducing atmosphere; (5) feeding the particle material after the solid-phase reaction into a cooling machine, and slowly cooling in a furnace by adopting a nitrogen direct circulating cooling method; 6) crushing the cooled material by a crusher until the particle size is less than 5mm; 7) performing magnetic separation on the ground powder by a high-gradient magnetic separator.According to the method, efficient dealkalization and iron element reduction separation are realized through high-temperature dealkalization pre-reduction and high-temperature deep reduction melt separation.

The invention discloses a low-loss high-tunability BZT laminated dielectric film and a preparation method thereof, the laminated film comprises a substrate, a BZT film layer and a zinc niobate-based microwave dielectric ceramic film layer, and the chemical general formula of the zinc niobate film layer is Zn [(Ge0. 5Mo0. 5) xNb1-x] 2O6. A ceramic target material is synthesized by adopting a solid-phase reaction method, and thin film layers are sequentially deposited through a magnetron sputtering technology to construct a heterostructure. The high dielectric constant of BZT and the low loss characteristic of zinc niobate are combined, the frequency characteristic is remarkably improved, the dielectric loss is effectively reduced while the high tunability is kept, and the high-quality FOM is obtained and reaches 36.77. The film is excellent in performance and controllable in process, and has important application value in microwave communication devices such as tunable filters and phased array radars.

The invention provides a crack-free lithium niobate film based on a Si substrate and a growth method and application thereof, and belongs to the field of ferroelectric film growth methods. According to the crack-free lithium niobate thin film based on the Si substrate, the substrate is selected from a Si substrate, and a target material is selected from congruent lithium niobate ceramic doped with 2.0 mol%-5.0 mol% of erbium and congruent lithium niobate ceramic doped with 5.0 mol% of iron prepared by a solid-phase reaction method, or is selected from congruent lithium niobate crystal doped with 2.0 mol% of erbium and congruent lithium niobate crystal doped with 5.0 mol% of iron prepared by a Czochralski method, or is selected from congruent lithium niobate crystal doped with 5.0 mol% of erbium and congruent lithium niobate crystal doped with 5.0 mol% of iron prepared by a Czochralski method. The lithium niobate thin film shows a lithium niobate (006) characteristic diffraction peak and a lithium-deficient phase LiNb3O8 (-602) characteristic diffraction peak, the surface of the lithium niobate thin film is flat, smooth and crack-free, the problem of surface cracking of a Si-based lithium niobate thin film for a long time is solved, and the lithium niobate thin film can be used for preparing micro-cavities, electro-optical modulators, photoelectric detectors, super-surface micro-nano devices and the like and has wide application prospects. And a foundation is laid for manufacturing and researching an integrated device on a lithium niobate film sheet.

The invention provides a broadband high-reflection metal ceramic layered composite material and a preparation method and application thereof.A compact ceramic matrix BaLa2Ti3-xHfxO10 is prepared through a solid-phase reaction, x is larger than 0 and smaller than 0.9, Ti < 4 + > is equivalently replaced with Hf < 4 + > to regulate oxygen vacancies and defect energy levels in crystals, intrinsic / impurity absorption is reduced, and the visible near-infrared reflection performance is improved. And then a metal layer is constructed on the ceramic substrate through magnetron sputtering, and the layered composite material is formed. The average reflectivity of the composite material is 77% at the wave band of 0.5-2.5 microns, and the average reflectivity of the composite material is 70% at the wave band of 2.5-20 microns; and the metal layer provides free carrier retroreflection and crack bridging effects, so that the thermal shock resistance and the cracking resistance are remarkably improved, and light-heat-force collaborative optimization is realized. According to the invention, ultra-wideband high reflection and high-temperature mechanical reliability are both considered, and the material is suitable for scenes such as light path reflectors, laser protection, radiation reflection heat insulation protection and infrared stealth.

The invention provides a method for solid-phase synthesis of a dipeptide side chain of semeglutide. Specifically, the method comprises the following steps: 1) in an alkaline environment, grafting Fmoc-Aib-OH to 2-CTC resin through a solid-phase reaction to obtain Fmoc-Aib-resin; (2) removing an Fmoc protecting group of the Fmoc-Aib-resin, so as to obtain Aib-resin; 3) in the presence of a condensation reagent, carrying out a coupling reaction on the Aib-resin and R-His (R ')-OH to obtain R-His (R')-Aib-resin; 4) in the presence of a cracking reagent, removing the resin from the R-His (R ')-Aib-resin to obtain R-His (R')-Aib-OH; 5) reacting the R-His (R ')-Aib-OH with the HR ''to obtain the semeglutide dipeptide side chain R-His (R')-Aib-R. The preparation method is simple to operate and easy to amplify production, and the semeglutide dipeptide side chain prepared according to the preparation method can meet the requirements of different semeglutide synthesis processes and is wide in market application.

The invention discloses a method for determining activity of host cell proteolytic enzyme of hydrolyzed polysorbate, and belongs to the technical field of biological detection. The method comprises the following steps: adding a solid-phase reaction substrate (containing a polysorbate analogue) and a to-be-detected sample into a buffer solution to react, removing the solid-phase reaction substrate by utilizing a magnetic adsorption method after the reaction is finished, and carrying out fluorescent quantitative PCR amplification reaction on the residual reaction solution to determine the content of free DNA in the reaction solution. Host cell proteolytic enzyme activity to hydrolyze polysorbate is determined by free DNA content. The method effectively solves the problems of insufficient sensitivity, complex operation and unstable result in the traditional detection method, obviously improves the detection precision and the experimental operation efficiency, enhances the quality monitoring in the drug research and development stage and the safety guarantee of the final product, improves the quality control level of the protein biological drugs, and has a wide application prospect. The effectiveness and the safety of the protein biological medicine in clinical medication are ensured.

The invention belongs to the technical field of lithium-sulfur battery materials, and particularly relates to a preparation method of battery-grade lithium sulfide based on microwave-assisted gas-solid phase reaction and in-situ coating. According to the preparation method, high-efficiency and low-consumption preparation of the battery-grade lithium sulfide is realized by adopting a technical path of combining gas-solid phase reaction of a microwave plasma activated sulfur source and a lithium source, adopting a supercritical fluid-assisted in-situ carbon coating process and adopting an alcohol washing-supercritical CO2 drying purification system; meanwhile, the problems of low product purity, high energy consumption, poor stability and the like in the traditional process are solved.

The invention discloses an iron phosphate pre-embedded lithium intermediate and a carbon-coated lithium iron phosphate positive electrode material and a preparation method thereof, and the preparation method comprises the following steps: taking iron phosphate and lithium hydroxide as raw materials, burdening according to a molar ratio of Li: P = (1.00-1.05): 1, dispersing in deionized water to form slurry, carrying out hydrothermal reaction for 4-15 hours at 110-150 DEG C under a nitrogen condition, cooling, filtering and drying after the reaction is finished, and thus obtaining the carbon-coated lithium iron phosphate positive electrode material with the iron phosphate pre-embedded lithium intermediate and the carbon-coated lithium iron phosphate positive electrode material. The iron phosphate pre-intercalation lithium intermediate is obtained. The intermediate is composed of an iron phosphate phase, a lithium pyrophosphate phase and a ferroferric oxide phase, and the lithium pyrophosphate phase and the ferroferric oxide phase are uniformly distributed in the iron phosphate pre-embedded lithium intermediate. According to the prepared iron phosphate pre-embedded lithium intermediate, the lithium element is uniformly dispersed in the intermediate, and uniform distribution of the lithium element can be realized from a molecular level in a subsequent process of preparing a lithium iron phosphate positive electrode material through a solid-phase reaction, so that pure-phase lithium iron phosphate is obtained.

The invention discloses an alumina carrier and a preparation method thereof. The alumina carrier is of a core-shell structure, a nuclear phase is alumina molded particles with the size of 0.5-5 mm, a shell phase is a hexagonal flaky alumina aggregate, and hexagonal flaky alumina grows on the surface of the nuclear phase in situ. The preparation method comprises the following steps: (1) placing alumina molded particles and an organic quaternary ammonium base solution in a closed reactor in a solid-liquid two-phase separation state, and carrying out gas-solid phase reaction under self-generated pressure; and (2) drying and roasting the solid phase obtained in the step (1) to obtain the aluminum oxide carrier with the core-shell structure. The alumina carrier is of a core-shell structure, the shell is composed of hexagonal sheet-shaped alumina, a good reaction interface is provided, the carrier does not crack when encountering water, an active component can be loaded by adopting a common solution impregnation method, and the alumina carrier can be directly used as a catalyst carrier.

The invention belongs to the technical field of mineral processing treatment, and particularly discloses porous magnesium oxide based on dolomite and a macro-quantity preparation method of the porous magnesium oxide. The method comprises the following steps: crushing dolomite ore, and carrying out solid-phase reaction on the crushed dolomite ore and ammonium dihydrogen phosphate to obtain a mixture containing MgNH4PO4 and calcium phosphate; then selectively dissolving out magnesium in the mixture by using an acetic acid solution to obtain magnesium-rich filtrate and calcium hydrophosphate filter residues; mixing the magnesium-rich filtrate with ammonium bicarbonate for reaction to obtain basic magnesium carbonate precipitate and an ammonia-containing solution; sequentially carrying out first heat treatment and second heat treatment on the basic magnesium carbonate precipitate to obtain the porous magnesium oxide. According to the method, the porous magnesium oxide is successfully prepared on a large scale by taking the dolomite with large reserves and low cost as a direct raw material; the porous magnesium oxide also has the advantages of hierarchical pore structure and large specific surface area.

The invention belongs to the field of adsorbents, and particularly relates to a high-temperature-resistant titanium-based lithium ion selective adsorbent with high-selectivity lithium ion capturing capability, which is prepared by the following steps: preparing a zirconium / aluminum co-doped precursor based on a solid-phase reaction in an ozone environment; then carrying out short-time thermal shock oxidation modification on the high-temperature precursor and hydrogen peroxide at room temperature to introduce active sites, and then carrying out gradient pickling selective lithium removal. The equilibrium adsorption capacity of the adsorbent is 42-45mg / g, and the selectivity coefficient to Li < + > / Mg < 2 + > is greater than 1200; after 10 times of adsorption-desorption cycles, the adsorption capacity retention rate is higher than 93%. Particularly, the retention rate of the specific surface area is still more than 85% after calcination treatment at the high temperature of 800 DEG C for 2 hours; the adsorption and desorption process is kept at the temperature of 90 DEG C, and the capacity retention ratio is still 85% or above, so that the adsorbent can be used for treating high-temperature brine; the adsorbent is good in high temperature resistance.

The invention discloses an electrolytic cell active layer material and a preparation method thereof as well as an electrolytic cell and a preparation method thereof, and belongs to the technical field of solid electrolytic cells, the surface of NiO is coated with a BaCe (1-x) ZrxO3 material to obtain an active layer material NiO-BaCe (1-x) ZrxO3 with a nano structure, and 0.2 * 0.5; and the mass ratio of the BaCe < 1-x > Zr < x > O < 3 > material to the active layer material NiO-BaCe < 1-x > Zr < x > O < 3 > is (30-50 wt.%): 1. The prepared active layer material can effectively inhibit migration of Ni at a high temperature, meanwhile, the active layer material and the cerium-based electrolyte are subjected to a solid-phase reaction at the high temperature, the electronic conductance of the cerium-based electrolyte can be inhibited, the electronic conductance of the electrolyte is remarkably reduced, the OCV of the battery is improved, and good electrochemical performance is achieved.

The invention discloses a synthesis method of a low-cost mixed single crystal lithium ion battery lithium manganate positive electrode material, which comprises the following steps: (1) weighing manganese salt, transferring into equipment with a mixing function, adding a complexing agent, and uniformly mixing; (2) adding alkali into the mixture in the step (1), and fully mixing; the alkali is sodium hydroxide, sodium carbonate, sodium bicarbonate or a mixture thereof; and (3) transferring the mixture obtained in the step (2) to a roasting furnace, roasting at high temperature to obtain a manganese-based precursor, mixing the obtained manganese-based precursor with a lithium source, and roasting to obtain the lithium manganate positive electrode material. According to the invention, the synthesis process is simplified, the solid-phase reaction efficiency is improved, and the lithium manganate positive electrode material of the lithium ion battery, which has a mixed single-crystal structure and is low in cost and excellent in performance, can be prepared.

The invention discloses MgNb2O6 dielectric ceramic with excessive Mg and a preparation method of the MgNb2O6 dielectric ceramic, and belongs to the technical field of dielectric ceramics, MgNb2O6 + x mol.% MgO (x is greater than 0 and less than or equal to 3) dielectric ceramic is prepared by adopting a solid-phase reaction method, and excessive Mg ions do not change the phase structure of the ceramic but can inhibit abnormal growth of ceramic crystal grains, so that the crystal grains are more uniform. Besides, along with the increase of excessive Mg ions, the dielectric constant epsilon r and the quality factor Q * f of the MgNb2O6 ceramic are in a trend of firstly increasing and then decreasing, and when x is equal to 2, the ceramic has the optimal dielectric properties that epsilon r is equal to 20.37, Q * f is equal to 85 and 410 GHz, and tauf is equal to-62.21 ppm / DEG C.

The application provides a high-nickel ternary single-crystal positive electrode material and a preparation method, a positive electrode sheet and a lithium ion battery. The preparation method of the high-nickel ternary single-crystal positive electrode material comprises the following steps: providing a precursor, the porosity of the precursor being 30%-50%; mixing the precursor with a lithium source, and performing nitrogenization treatment under an ammonia atmosphere to prepare a nitrogenization treatment product; performing pre-oxidation treatment on the nitrogenization treatment product under an oxygen atmosphere to prepare a pre-oxidation treatment product; performing sintering treatment on the pre-oxidation treatment product under an oxygen atmosphere to prepare the high-nickel ternary single-crystal positive electrode material; and the temperature of the sintering treatment being 700 DEG C-900 DEG C. The preparation method of the high-nickel ternary single-crystal positive electrode material provided by the application reconstructs the solid-phase reaction path of the high-nickel material, suppresses the Li + / Ni 2+ mixing arrangement while realizing controllable preparation of single-crystal particles at a low temperature, so that the high-nickel ternary positive electrode material with high capacity retention rate and excellent cycle stability is obtained.

The present application relates to the field of environmental protection and emission reduction, and discloses a desulfurization and carbon sequestration absorbent and a preparation method thereof, the raw materials of the desulfurization and carbon sequestration absorbent include substance A, kaolin and paper pulp, wherein the substance A is prepared according to the following procedures: S1, the cement raw material is heated to 900-1100 DEG C for solid-phase reaction, and then cooled to 300-400 DEG C to obtain an intermediate; S2, the intermediate is mixed with water, and then sieved and ground to obtain the substance A; wherein in step S1, the cement raw material contains limestone, high-silicon sandstone with a silicon dioxide content of not less than 80 wt%, low-silicon sandstone with a silicon dioxide content of 20-60 wt% and iron correction material. The desulfurization and carbon sequestration absorbent provided by the present application can achieve a desulfurization and carbon reduction effect of more than 90% on flue gas in a low-temperature environment (≤100 DEG C), and has low cost, and has a good application prospect in the field of flue gas treatment in the steel, power generation, coking and cement industries.

The application discloses a single crystal growth method of Bi-O-Se-Cl four-component semiconductor material. The chemical formula of the Bi-O-Se-Cl four-component semiconductor material is Bi 10 O 12 SeCl4, each unit cell of the crystal contains 98 atoms, has a layered structure with two layers of [Bi 12 O 12 Se2Cl], two layers of [Bi6O 10 ] and four layers of [3Cl] alternately stacked along the c-axis. The growth method is as follows: bismuth powder and selenium powder are ground and mixed, and then a solid phase reaction is caused to obtain bismuth selenide; bismuth oxide, bismuth chloride and bismuth selenide are ground and mixed to obtain mixed powder 2, which is placed at the bottom of a quartz tube, vacuumized and sealed; the sealed quartz tube is horizontally placed in a two-zone furnace, and gas phase transportation is started; the hot end and the cold end of the two-zone furnace are respectively subjected to gradient heating and heat preservation, and after the end, the two-zone furnace is cooled, and thus Bi 10 O 12 SeCl4 crystals are obtained. The Bi 10 O 12 SeCl4 crystal has a complex layered structure and is a candidate material with intrinsic low thermal conductivity, and the growth method is simple and reliable.

The present application relates to a series of compounds calcium halogenated borate and calcium halogenated borate nonlinear optical crystal and preparation method and use, the molecular general formula of the series of compounds is Ca2B3O6X, wherein X=Cl, Br, molecular weight 244.04-288.50, the compound is synthesized using solid phase reaction method;The crystal is orthorhombic, space group Cmc 21, the cell parameter is a=15.360 (6)-15.406 (2) Å, b=22.115 (3)-22.175 (10) Å, c=7.3617 (11)-7.454 (4) Å, Z=16, V=2508.2 (6)-2538.7 (19) Å 3 , the crystal is grown using cosolvent method, the powder frequency doubling effect is about 1.5-2 times of KDP (KH2PO4), has wide light transmission waveband, the crystal preparation method is simple, and the cost is low, the prepared crystal is large in mechanical hardness, easy to cut, polishing processing and preservation, the series of calcium halogenated borate nonlinear optical crystal described in the application has the advantages of stable physical and chemical properties, moderate mechanical hardness, not easy to break, easy to cut, polishing processing and preservation and the like.

The application belongs to the field of sports health, and provides a single-atom active site-based ZnPc, a dual-mode sensor and a method, which comprises the following steps: stirring and reacting an initial product obtained by solid-phase reaction of 4-nitrophthalonitrile, zinc acetate, urea and ammonium molybdate in HCl solution and NaOH solution; cooling to room temperature, washing with deionized water after filtration, and vacuum drying to obtain tetranitro ZnPc; reacting the tetranitro ZnPc with Na2S·9H2O in N,N-dimethylformamide; after cooling to room temperature, dispersing the reaction product in deionized water, washing with deionized water until neutral, and drying the obtained solid in a vacuum oven to obtain tetraamino ZnPc; and preparing a photoelectric / colorimetric dual-mode sensor by using the tetraamino ZnPc, wherein the preparation method is simple, and the post-treatment is relatively easy; and the dual-mode sensor method is used for PSA detection, and has high sensitivity, good reliability and good stability.

The invention discloses a preparation method of a phosphoric acid amide modified carbon nitride material for treating uranium-containing wastewater. The method comprises the following steps: 1, calcining dicyandiamide at high temperature, cooling and grinding to obtain blocky carbon nitride; 2, thermally stripping the blocky carbon nitride, and performing thermal treatment under ammonia gas to obtain flaky carbon nitride with amino on the edge; 3, carrying out gas-solid phase reaction on the flaky carbon nitride and sodium hypophosphite, and then carrying out annealing treatment to obtain a phosphoric acid amide modified carbon nitride material; a phosphoric acid amide group is introduced into a framework of the material to form an intramolecular dipole structure; the material is used as a photocatalyst to be added into uranium-containing wastewater for photocatalytic reaction. The functional photocatalyst with strong intramolecular polarity is constructed by accurately introducing a phosphoric acid amide group into a carbon nitride skeleton, has strong adsorption and efficient photocatalytic reduction capabilities on uranyl ions, and can efficiently and stably treat hexavalent uranium in uranium-containing wastewater into tetravalent uranium in an open water system without a sacrificial agent; the method is suitable for uranium-containing wastewater field.

[Configuration] Provided is a method for thermally decomposing a poorly-decomposable composite plastic waste material containing a thermosetting plastic typified by a carbon fiber pipe, a GFRP, a solar panel, a printed circuit board, and a waste tire, the method comprising (A) adding, as a reaction accelerator, a PP- or PE-containing PS-free hydrogen-rich hydrocarbon-based plastic having a high Arrhenius factor into a thermal decomposition tank together with the poorly-decomposable composite plastic waste material containing the thermosetting plastic that is a material to be thermally processed, in an amount of 20 parts by weight or more and preferably in an equal amount or more with respect to 100 parts by weight of the material to be thermally processed; keeping the melting temperature of the reaction accelerator for 1 to 2 hours to perform a (liquid phase)-(solid phase) reaction; and subsequently raising the temperature to a thermal decomposition temperature to generate hydrogen radical or hydrocarbon radical from the reaction accelerator, thereby achieving the thermal decomposition by a (gas phase)-(solid phase) decomposition reaction. Examples of the reaction accelerator include random cleavage or decomposition type plastics each having a high Arrhenius factor, typified by PE (LDPE or HDPE) and PP.

The application discloses a yttria-corundum-mullite composite material, which comprises the following chemical components in percentage by mass: mullite 34.3%-34.475%, corundum 63.7%-64.025% and yttria 1.5%-2%; the apparent porosity of the composite material is 17.13%-18.03%; the composite material comprises corundum phase, mullite phase and yttrium aluminum garnet phase, and the yttrium aluminum garnet phase is generated by solid phase reaction of yttria and corundum in a high-temperature sintering process; by adding 1.5%-2wt% yttria as a modifier, the bending strength of the composite material is up to 58.53MPa, and the strength is improved by 131.50% compared with that of the corundum-mullite material without adding yttria; the apparent porosity is reduced to 17.13%-18.03%, the bulk density is optimized to 2.4333g / cm3, and the densification degree is greatly improved.