512 results about "Iodide" patented technology

The invention discloses a zinc-iodine battery positive electrode material based on corn straw shell derived porous carbon and a preparation method of the zinc-iodine battery positive electrode material. According to the material, corn straw shells serve as the sole carbon source, an indigenous nitrogen-doped biomass charcoal carrier with a hierarchical pore structure is prepared through pre-carbonization and KOH activation processes, and the material is characterized in that the specific surface area is larger than or equal to 1500 m < 2 > / g, and the micropore proportion is larger than 90%. The iodine is loaded on the carrier (the iodine content is greater than or equal to 45wt%) through a vacuum sublimation method to form the indigenous nitrogen-doped biomass charcoal / iodine composite material. According to the positive electrode material, through the synergistic effect of physical confinement and pyridine nitrogen chemical adsorption, the multi-iodide shuttle effect is effectively inhibited, so that the capacity retention rate of the zinc-iodine battery is greater than or equal to 93% after 40000 cycles under the current density of 2A g <-1 >, and the capacity retention rate is greater than 45% under the rate of 10A / g. The method has double benefits of agricultural waste resource utilization and high-performance energy storage device development.

The invention relates to an aqueous zinc-iodine battery electrolyte containing a phenolic additive, and a preparation method and application thereof, and belongs to the technical field of aqueous zinc-iodine batteries. The invention aims to solve the technical problems of serious multi-iodide shuttling and negative electrode by-products of the existing aqueous zinc-iodine battery. The preparation method of the aqueous zinc-iodine battery electrolyte containing the phenolic additive comprises the following steps: dissolving zinc salt and the phenolic additive in deionized water, and fully stirring and mixing to obtain the aqueous zinc-iodine battery electrolyte containing the phenolic additive. The phenolic additive used in the application can accelerate conversion from I3-to I-, accelerate iodine conversion reaction kinetics and reduce generation of polyiodide, so that shuttling of the polyiodide is effectively inhibited, a phenolic additive monomer is adsorbed on the surface of a zinc negative electrode, contact between Zn < 2 + > and water molecules is reduced, and generation of zinc negative electrode by-products is inhibited; the zinc-iodine battery also has the advantages of being easy to manufacture and low in cost.

The invention discloses a polymer sealing ring and a preparation method thereof, and relates to the technical field of polymer materials. The high-temperature-resistant fluororubber sealing gasket is prepared from the following raw materials in percentage by mass: 30 to 50 percent of fluorinated modified silicone rubber, 15 to 25 percent of fluororubber, 7.2 to 16.4 percent of hybrid white carbon black, 2.5 to 6 percent of hydroxyl silicone oil, 8 to 11 percent of plasma fluorinated modified aluminum oxide, 4 to 8 percent of carbon black, 0.8 to 1.4 percent of palm wax, 0.8 to 1.4 percent of internal release agent, 1 to 2 percent of vulcanizing agent, 3 to 5 percent of triallyl isocyanurate and 0.5 to 1 percent of anti-aging agent. The fluorinated modified silicone rubber is prepared by grafting C2-18-perfluoroalkyl iodoethane on a silicone rubber side chain, so that the low temperature resistance of the silicone rubber is effectively improved, and the phenomenon that methyl vinyl silicone rubber is easy to crystallize at low temperature is successfully inhibited; the sealing ring material has good performance at high and low temperatures, and the use temperature range of the sealing ring material is effectively improved.

The invention discloses a cellulose paper-based diaphragm for a zinc-iodine battery as well as a preparation method and application of the cellulose paper-based diaphragm. The diaphragm is of a three-layer composite structure and comprises a matrix layer formed by paper pulp fibers such as softwood pulp, hardwood pulp, bamboo pulp or straw pulp through a wet papermaking technology, and compact functional layers which cover the two sides of the matrix layer and are formed by oxidized nanocellulose (TOCN). The preparation method mainly comprises the following steps: preparing the paper-based diaphragm matrix through wet papermaking, coating the two sides of the paper-based diaphragm matrix with TOCN aqueous dispersion, and finally carrying out hot-pressing drying treatment to enable the three layers to be tightly combined. According to the invention, the nano aperture and the surface negative electricity functional group of the TOCN layer are utilized, so that physical blocking and electrostatic repulsion of polyiodide ions can be realized at the same time, and the shuttle effect is effectively inhibited; and the uniform pore channels can guide zinc ions to uniformly deposit and inhibit dendritic crystal growth. The diaphragm is green in raw material, simple in process and low in cost, and the cycle life and coulombic efficiency of the battery can be remarkably improved when the diaphragm is applied to the zinc-iodine battery.

Methods, systems and devices for PFAS destruction including adding a sulfite salt to an aqueous solution containing PFAS and then irradiating the aqueous solution with light at 222 nm. The method may include adding a base to the aqueous solution in an amount sufficient to raise a pH of the aqueous solution including PFAS to about 10 or more. It may also include adding a halide salt such as a bromide salt or an iodine salt, and further adding a carbonate. Greater than 90%, or greater than 99%, of the PFAS in the solution may be destroyed by irradiating the aqueous solution in this way.

The invention relates to an iodine-loaded positive electrode for a zinc-iodine battery and a preparation method and application of the iodine-loaded positive electrode, and belongs to the technical field of positive electrode materials for zinc-iodine batteries. The preparation method of the iodine-loaded positive electrode for the zinc-iodine battery comprises the following steps: mixing an iodine-loaded carbon material, conductive carbon black, a polysaccharide binder and deionized water in proportion, grinding into slurry, uniformly coating a current collector with the slurry, and drying to obtain the iodine-loaded positive electrode for the zinc-iodine battery. As the polysaccharide binder is rich in a large number of active functional groups (hydroxyl, carboxyl and the like), dissolution of active iodine and a shuttle effect of polyiodide can be inhibited through a chemical adsorption effect, corrosion to a zinc negative electrode caused by attenuation of battery capacity and shuttle of the polyiodide is avoided, and the polysaccharide binder has a good application prospect in the zinc-iodine battery.

The invention discloses an electrolyte for improving the cycling stability of a zinc-sulfur battery and application of the electrolyte in a photoelectric storage integrated battery. The electrolyte comprises a solvent, an additive and zinc salt, the additive is iodide, and the iodide comprises iodine negative ions and positive ions or polar functional groups. The functional additive is added into the electrolyte, positive ions inhibit dendritic crystals and side reactions of zinc, and iodine negative ions accelerate reversible change between sulfur and zinc sulfide, so that the cycling stability of the zinc-sulfur battery is improved. A zinc-sulfur battery with high specific capacity and long cycle life is integrated with a solar battery, so that the photoelectric storage integrated battery with high overall conversion efficiency, high specific capacity and long cycle life is prepared.

The invention relates to an electrolyte for synergistically stabilizing positive electrode iodine multi-electron reaction through four-combination zinc salt and a high-surface-capacity zinc-iodine soft package battery. The electrolyte comprises the four-combination zinc salt and water, in the electrolyte, the total concentration of zinc ions in the four combinations of zinc salts is 2 + / -0.2 mol / L; the four-combination zinc salt is a four-combination zinc salt; the SO4 < 2-> in the electrolyte buffers the pH value of a system, so that side reaction of a negative electrode is reduced; cH3COO <-> can be cross-linked with I3 <->, so that shuttling of polyiodide is inhibited, and reversibility of a two-electron reaction is enhanced; bromide ions Br <-> in the electrolyte are chemically combined with I < + > through isohalogen to excite four-electron reaction; the trifluoromethanesulfonate OTf <-> with strong electronegativity surrounds the positive electricity I < + > by virtue of an ion atmosphere effect, so that active water molecule attack hydrolysis failure is avoided, a synergistic stable positive electrode iodine multi-electron reaction is realized, and the high-surface-capacity zinc-iodine soft package battery is beneficial to promoting the development of the zinc-iodine battery to practical application.

The invention discloses a battery electrolyte and a preparation method thereof, an aqueous zinc-iodine battery and terminal equipment. The battery electrolyte comprises an additive, an electrolyte and a solvent, the additive contains an amino functional group, and the concentration of the additive is 0.1 g / L-0. 5 g / L. In addition, the additive can also utilize a nitrogen-containing functional group to reduce the shuttle effect of polyiodide and prevent the loss of an iodine positive active material, so that the electrode of the zinc ion battery is protected, and the cycle life of the zinc ion battery is remarkably prolonged (the capacity is about 20mAh / g higher than that of an electrolyte without L-tyrosine).

The invention relates to the technical field of chemistry, in particular to a synthesis process of 4-fluoro-3, 5-dimethylphenylhydrazine hydrochloride, which comprises the following steps: by taking 4-fluoro-3, 5-dimethylbromobenzene as a raw material and hydrazine hydrate as a hydrazine source, matching with alkali such as potassium hydroxide, sodium hydroxide or potassium phosphate and the like, reacting at the temperature of 60-80 DEG C to obtain the 4-fluoro-3, 5-dimethylphenylhydrazine hydrochloride. The preparation method comprises the following steps: by taking copper or nickel source catalysts such as cuprous bromide, cuprous iodide, nickel salicylate and the like, N, N-bis (2, 6-dimethylphenyl) oxamide as a ligand, hexadecyl trimethyl ammonium bromide as a stabilizer and a dioxane-water mixed system as a solvent, reacting at 80-110 DEG C under the protection of nitrogen, separating a reaction mixed solution after the reaction is finished, and separating the reaction liquid to obtain the target product. And purifying to obtain a finished product of the 4-fluoro-3, 5-dimethyl phenylhydrazine hydrochloride. Therefore, the problems that the synthesis of the 4-fluoro-3, 5-dimethylphenylhydrazine hydrochloride is poor in safety, low in production efficiency, poor in environmental friendliness, small in substrate application range and the like are solved.

The invention relates to the technical field of chemical intermediates, and particularly discloses a preparation method of a givelastat intermediate.According to the preparation method, an initiator compound 5 can be synthesized by adopting cheap 2-hydroxy-6-naphthoic acid (CAS: 16712-64-4, 141 yuan / kg), and the preparation method is different from a method in the prior art. A gemvelastat intermediate compound 4 is synthesized from a compound 5 through a three-step reaction, compared with the prior art, the yield is high, industrial amplification production is more facilitated, in the process of synthesizing a compound 6 from the compound 5, acetonitrile can be adopted as a cyanide source in a reaction system, activated hydroxyl is subjected to a coupling reaction, and the yield is high. In the process of synthesizing a compound 6 from a compound 7 instead of a traditional metal cyanide, or in the process of synthesizing a compound 6 from another compound 5, a cheap cuprous cyanide and cuprous iodide system is adopted for a coupling reaction, and in the process of synthesizing a compound 4 from a compound 7, an acetic acid and sodium triacetoxyborohydride reaction system is adopted, so that the compound 6 is synthesized. And the important intermediate of the givelastat can be obtained with high yield.

A method of obtaining a purified rare earth metal deposit from a rare earth metal halide salt, by: (i) producing a rare earth metal borohydride salt by the following reaction:n·ABH4+m·(RE)X3→RE(BH4)3+n·AXwherein the variables are defined as follows: A is an alkali metal cation; RE represents one or more rare earth metal cations; X represents a halide selected from chloride, bromide, and iodide; n is the molar amount of ABH4; and m is the molar amount of (RE)X3; wherein the ratio of n:m is 3:1 to 5:1; (ii) mixing RE(BH4)3 and AX with a halogen-free organic solvent to form a solution containing the RE(BH4)3 salt dissolved therein and with AX undissolved and precipitated; and (iii) contacting the solution from step (ii) with an anode and cathode in electrical communication, and electrically charging the anode and cathode to electroplate the rare earth metal onto the cathode.

The invention discloses cyclodextrin alkyl ether sulfonic acid as well as a preparation method and application thereof, and relates to the technical field of oil and gas field auxiliaries. The preparation method of the cyclodextrin alkyl ether sulfonic acid comprises the following steps: adding hydroxyl alkyl sulfonic acid into dichloromethane, adding alkali and a sulfonyl chloride reagent, and reacting for 3-5 hours to obtain sulfonate; the preparation method comprises the following steps: adding sulfonate into iodide, adding acetone, reacting for 5-8 hours, and removing excessive iodide after the reaction is finished, so as to obtain iodo-hydrocarbyl sulfonic acid; the preparation method comprises the following steps: dissolving cyclodextrin in tetrahydrofuran, cooling to 0 DEG C, adding alkali under the protection of nitrogen, reacting for 0.5-2 hours, then adding iodo-alkyl sulfonic acid, reacting for 30-60 hours at room temperature, cooling to 0 DEG C, and carrying out reduced pressure distillation to obtain cyclodextrin alkyl ether sulfonic acid; the cyclodextrin alkyl ether sulfonic acid prepared by the invention is used as a cosolvent of the powder resistance-reducing agent, can effectively prevent aggregation among molecules of the powder resistance-reducing agent, improves the dispersity, reduces agglomeration and precipitation phenomena, and meanwhile, can avoid pipeline blockage in a conveying process.

The invention relates to the technical field of zinc-iodine battery electrolyte, in particular to aqueous zinc-iodine electrolyte as well as a preparation method and application thereof. The aqueous zinc-iodine battery electrolyte contains an additive and a zinc salt, the molar concentration of the additive is 0.15 M to 0.8 M, and the additive is selected from one or more of triethylamine hydrochloride, 1-butyl-1-methylpyrrolidine chloride, 1, 3-dimethylimidazole chloride, pyridine hydrochloride, aniline hydrochloride, guanidine hydrochloride and 1-ethyl-3-methylimidazole chloride. The method can directionally regulate and control zinc negative electrode deposition and iodine positive electrode reaction kinetics, realizes four-electron reversible conversion, promotes uniform deposition of zinc ions and inhibits side reactions during charging, inhibits multi-iodide shuttle and I < + > hydrolysis during discharging, and has wide application prospects in the zinc-iodine battery electrolyte industry.

The invention relates to the technical field of iodide content detection, in particular to a method for determining radiochemical purity and iodine content of sodium iodide capsules for diagnosis by HPLC (High Performance Liquid Chromatography), which comprises the following steps: setting chromatographic conditions, and connecting a radioactive flow detector and an ultraviolet detector in series; preparing a disodium hydrogen phosphate solution, a glucose solution, a vitamin C solution, a first control solution, a potassium iodate solution, a second control solution, a carrier solution, a first sample solution, a second sample solution, a negative control solution and a test solution; and determining the radiochemical purity and iodide content of the first sample solution and the second sample solution in three batches based on the chromatographic conditions and the determination standard. According to the method, test parameters such as capsule sample analysis time, a pretreatment mode and a sample size are optimized, the radiochemical purity of the capsule is accurately determined, and the iodide content is controlled, so that the problem that main components cannot be accurately quantified and potential radioactive impurities cannot be detected by a traditional diagnosis sodium iodide [131I] capsule determination method is solved.

The invention belongs to the technical field of photoelectric materials and devices, and particularly relates to a perovskite thin film and a preparation method and application thereof. A fluorine-containing phosphazene compound is used as a ligand and is mixed with a perovskite precursor solution composed of lead iodide, formamidine iodine and cesium iodide, spin coating is performed, the fluorine-containing phosphazene compound and part of formamidine cations form hydrogen bonds, part of formamidine cations are anchored at the bottom of a perovskite film, Cs-formamidine cations are uniformly distributed, and the perovskite film is prepared. Meanwhile, the fluorine-containing phosphazene compound and Pb < 2 + > form a coordinate bond, Pb < 2 + > defects are passivated, and the perovskite thin film is obtained through anti-solvent treatment and annealing treatment. The fluorine-containing phosphazene compound interacts with the components in the perovskite precursor solution, so that the nucleation rate of perovskite can be increased, the crystallization rate can be slowed down, the tensile stress can be eliminated, the perovskite does not enter crystal lattices, and the stability and crystallinity of the film are guaranteed. The perovskite thin film can be used for an inverted perovskite solar cell, and the performance and the stability of a device are improved.

The invention discloses a method for preparing a perovskite solar cell based on a fused salt doped Spiro-OMeTAD hole transport layer, and the method comprises the steps: dissolving lead iodide and formamidine iodide in a mixed solvent of N, N-dimethylformamide and dimethyl sulfoxide according to a molar ratio of (0.8-1.5): 1 to prepare an FAPbI3 perovskite precursor solution; the method comprises the following steps: mixing cyclohexylamine trifluoroacetic acid and 4-tert-butylpyridine according to a molar ratio of 1: (8-14), dissolving the mixture in a 70-110 mg / mL Spiro-OMeTAD chlorobenzene solution, adding an acetonitrile solution of LiTFSi, and stirring at normal temperature to obtain a hole transport material Spiro-OMeTAD solution; spin-coating the FTO substrate with an electron transport layer material, spin-coating the electron transport layer with the FAPbI3 perovskite precursor solution, and annealing to form a perovskite thin film; the method comprises the following steps: spin-coating an ammonium butyrate iodide solution on a perovskite thin film to obtain an interface modification layer, spin-coating a hole transport material Spiro-OMeTAD solution on the interface modification layer to obtain a cyclohexylamine trifluoroacetic acid doped Spiro-OMeTAD hole transport layer, and evaporating an interface modification layer and a metal electrode on the Spiro-OMeTAD hole transport layer.

The invention belongs to the technical field of separation and detection, and particularly relates to a method for determining iodide in domestic drinking water. Measuring the iodide in the domestic drinking water by adopting a high performance liquid chromatography-ultraviolet detection method; taking a domestic drinking water sample solution for detection, and quantifying by an external standard method; according to the detection method, a Metrosep A Supp5-250 chromatographic column (250 mm * 4.0 mm, 5 [mu] m) is adopted for separation, 4.5 mmol / L Na2CO3, 1.0 mmol / L NaHCO3 and 35% acetonitrile are adopted as a mobile phase, a DAD detector is adopted, the wavelength is 226 nm, the flow rate is 0.60 mL / min, and the column temperature is 50 DEG C. The invention also discloses a method for detecting the content of the sodium hydroxide in the sample. According to methodology verification, the method can be used for measuring iodide in domestic drinking water, the detection limit is 2.0 mu g / L and is superior to that of a spectrophotometric method and a volumetric method in the national standard, no complex pretreatment process exists, specificity is high, toxic and harmful chemical reagents are not used, online automatic sample injection can be achieved, and the method has obvious advantages for large-batch samples; compared with inductively coupled plasma mass spectrometry, used instruments are relatively cheap, and basic popularization and application are facilitated.

The invention provides a water-based composite electrolyte and a preparation method and application thereof. The water-based composite electrolyte comprises soluble zinc salt, amino acid hydrochloride additives and deionized water. The aqueous composite electrolyte can be used for a symmetrical button cell, a half cell or an aqueous zinc ion total cell. By adjusting zinc ion deposition on the surface of the zinc electrode, the growth of zinc dendrites is reduced, and the shuttle effect of the iodine positive electrode is inhibited, so that the coulombic efficiency and the cycle performance of the water-based zinc-iodine battery are improved. The additive disclosed by the invention can be adsorbed on the surface of a zinc negative electrode, delays the nucleation process and inhibits the growth of zinc dendrites; the form of hydrochloride can play a role of a buffer solution, stabilize the pH value of the electrolyte, inhibit the corrosion of the zinc negative electrode and reduce the hydrogen evolution reaction; the hydrochloride form can weaken the protonation effect of amino acid groups and enhance the electrostatic interaction between the amino acid groups and the polyiodide, so that the shuttle effect is inhibited, and the coulombic efficiency and the cycle performance of the aqueous zinc-iodine battery are improved.

The invention discloses a preparation method of an efficient and stable wide-band-gap perovskite solar cell based on double-layer interface passivation, and relates to the technical field of solar photovoltaics. According to the method, on the basis of 9-octadecenyl amine iodide (OAmI) and phenethyl amine iodide (PEAI), the OAmI anchors a crystal boundary to inhibit ion migration, and cooperates with the PEAI to generate two-dimensional perovskite in situ to optimize energy band alignment, so that deep-shallow energy level defect synergistic passivation is realized. Under the optimal condition, the photoelectric conversion efficiency of the prepared solar cell reaches 22.54%, the initial efficiency of 86.4% is still kept after continuous irradiation of one sunlight for 500 hours, and the working stability of the wide-band-gap perovskite cell, especially the stability under the continuous illumination condition, is remarkably improved.

The invention is applicable to the technical field of metal organic framework materials, and provides a pillararene-based metal organic framework material and a preparation method thereof.The pillararene-based metal organic framework material takes a compound PY2-P5 as a ligand, and the material is one of PMOF1, PMOF2 and PMOF3; the PMOF1 is of a Cu4I4 cubic tetramer structure; the PMOF2 is of a Cu4I4 ladder tetramer structure, and the Cu4I4 ladder tetramer structure is a And the PMOF3 has a CuI one-dimensional chain structure. By introducing the pillararene ligand and regulating and controlling the coordination mode of the pillararene ligand and cuprous iodide, the metal organic framework material with stable structure and functional characteristics is constructed, the metal organic framework material has the dual advantages of host recognition site and fluorescence signal response, and can selectively distinguish 1-bromoalkane and 2-bromoalkane; a remarkable fluorescent blue shift signal is shown in the adsorption process, so that the visualization of molecular recognition and sensing is realized; the excellent molecular recognition capability of pillararene is maintained, the stability and reusability of the material are improved through framing, and a new way is provided for selective detection and separation of volatile organic compounds.

The invention relates to a 2N type manganese complex and a preparation method thereof, and a preparation method of phenylalkyl disiloxane. The invention discloses a 2N-type manganese complex and a preparation method thereof, and the preparation method comprises the following steps: (1) adding 2-bromo-pyridine, a ligand, potassium carbonate and cuprous iodide into a dimethyl sulfoxide solution, and reacting at 110-130 DEG C for 20-28 hours to obtain an N, N bidentate ligand; the ligand is 1-(pyridine-2-yl)-1H-indole, or 2-(1H-pyrazole-1-yl) pyridine, or 2-(2H-1, 2, 3-triazole-2-yl) pyridine, and the ligand is one or more of 1-(pyridine-2-yl)-1H-indole, 2-(1H-pyrazole-1-yl) pyridine, 2-(2H-1, 2 And (2) dissolving the N, N bidentate ligand and Mn (CO) 5Br in a tetrahydrofuran solution, and reacting at 65-75 DEG C for 10-14 hours to obtain the 2N type manganese complex. According to the 2N-type manganese complex, the preparation method thereof and the preparation method of the phenyl alkyl disiloxane, the 2N-type manganese complex is used as a catalyst for hydrosilylation reaction of pentamethyldisiloxane, styrene and derivatives thereof to prepare the phenyl alkyl disiloxane.

The invention discloses a synthetic method of a C1-triazole oridonin derivative and an anti-tumor application of the C1-triazole oridonin derivative. The invention provides a synthetic method of the C1-triazole oridonin derivative, which comprises the following steps: carrying out four-step reaction to obtain an oridonin analogue containing an azide group at the C1 site, and catalyzing by cuprous iodide to obtain the C1-triazole oridonin derivative with the azide group at the C1 site, thereby obtaining the C1-triazole oridonin derivative with the azide group at the C1 site and the oridonin analogue with the azide group at the C1 site. According to the method, alkyne compounds containing different substituent groups react with C1-triazole oridonin to synthesize the C1-triazole oridonin derivative, the method is mild in condition and rapid in reaction, large-scale preparation of the C1-triazole oridonin derivative can be achieved, and the method is suitable for large-scale production of the C1-triazole oridonin derivative. Meanwhile, the C1-triazole oridonin derivative synthesized by the invention can be used for effectively inhibiting the proliferation activity of tumor cells and has a relatively good inhibition effect on MCF-7 cells and A549 cells.

The application discloses a perovskite solar cell passivated by a sulfur-containing passivation agent, and a passivation layer is formed on an APbX3 peroviskite film by using the sulfur-containing passivation agent. 2+ S in the sulfur-containing passivation agent interacts with the weakly acidic Pb as a Lewis base, and H in the passivation molecule can form a hydrogen bond with the nearby iodide to further strengthen the interaction, reduce the surface defect density of the APbX3 peroviskite film, improve the interface energy level matching between the peroviskite and the charge transport layer, reduce the environmental resistance of the peroviskite solar cell, and greatly improve the photoelectric conversion efficiency and stability of the APbX3 peroviskite solar cell.

The application belongs to the field of organic synthesis, and particularly relates to a synthesis method of 2-(3,3-dimethylbutyl)pyridine. 2-vinylpyridine, brominated tertiary butane, a mixed solution of dimethyl ether and isopropyl ether as a reaction system solvent, nickel iodide as a nickel salt, bipyridine as a ligand, dicyclohexylmethylamine as a base in the system, 2,6-dimethyl-3,5-diethyl-1,4-dihydropyridine as a reducing agent, a photocatalyst 2,4,5,6-tetrakis(9 ‑ Carbazole) - m-phenylenedinitrile, under the condition of room temperature and nitrogen atmosphere, a reduction cross-coupling reaction is used to synthesize 2-(3,3-dimethylbutyl)pyridine. The application uses inexpensive nickel metal as a catalyst, constructs a cross-coupling reaction of carbon-carbon bond, and has the advantages of mild reaction condition, high economy and the like.

The invention provides a series of polybenzyl bromide or polybenzyl iodide-based monomolecular resin photoresists as well as a preparation method and application thereof. The monomolecular resin can be used as a main body material of the photoresists. The raw materials are cheap and easily available, and the synthesis process is simple. According to the compound disclosed by the invention, adamantane is taken as a core unit, a plurality of benzyl bromide or benzyl iodine groups, adamantane and a benzene ring are externally connected, and bromine atoms or iodine atoms are additionally introduced, so that the sensitivity and the etching resistance of the photoresist can be improved to the maximum extent.

The present invention relates to the technical field of electrode materials, and specifically to a wide-temperature-range high-iodine-loaded positive electrode material, a preparation method thereof, and a zinc-iodine battery. Activated carbon and iodine element are mixed and then subjected to a heat treatment to sublime the iodine element and embed it into the activated carbon, thereby obtaining iodine-loaded carbon black I2@CB; gelatin and acetic acid solution are mixed to obtain a gelatin binder solution; iodine-loaded carbon black I2@CB, a conductive agent, and the gelatin binder solution are mixed to obtain an iodine positive electrode slurry; the iodine positive electrode slurry is coated on a stainless steel mesh and dried to obtain a wide-temperature-range high-iodine-loaded positive electrode material. The wide-temperature-range high-iodine-loaded positive electrode material prepared by the present invention effectively suppresses the problems of active iodine dissolution and polyiodide shuttling by utilizing the active functional groups of gelatin in the gelatin binder solution, such as peptide bonds, carboxyl groups, and amino groups, to restrain active iodine and chemically adsorb polyiodides.

The application relates to a metal organic tetrahedral cage compound, a preparation method and application thereof, and belongs to the technical field of fine chemical industry. The metal organic tetrahedral cage compound is obtained by reacting a rare earth metal cerium salt with H4BPDS as a ligand 3+ As a node, H4BPDS is used as a ligand. The metal organic tetrahedral cage compound prepared by the application has low raw material price, high yield, stable chemical properties, and can efficiently catalyze the reaction of aryl iodide and aryl sulfinate to prepare diaryl sulfone derivatives under mild light and warm conditions. For the catalysis of the reactions of 4-bromo-iodobenzene and 4-methylphenyl sulfinate sodium to prepare 4-bromophenyl-4-methylphenyl sulfone, 3-bromo-iodobenzene and 4-methylphenyl sulfinate sodium to prepare 3-bromophenyl-4-methylphenyl sulfone, and 4-bromo-3-fluoro-iodobenzene and 4-methylphenyl sulfinate sodium to prepare 4-bromo-3-fluorophenyl-4-methylphenyl sulfone, the yield can reach 95% at the highest.

This invention discloses an in-situ removal process for total inorganic iodide in water based on oxidation-adsorption, belonging to the field of water treatment technology. The process includes: first, taking raw water containing inorganic iodide, adding bicarbonate and adjusting the pH of the solution to 7-7.5; then, adding ferrous salt to the raw water; finally, adding KMnO4 to the raw water with added ferrous salt under stirring conditions, reacting to prepare a MnO2-nascent iron particle complex; on the one hand, promoting the removal of total inorganic iodide from water through mild oxidation-adsorption. ‑ Oxidation transformation occurs to generate HOI / I2; on the other hand, the in-situ products HOI / I2 are adsorbed and fixed through adsorption / co-precipitation methods, and nascent iron is captured through surface coordination or electrostatic adsorption. This invention achieves the capture of I2 under neutral / weakly alkaline drinking water conditions through a mild and controllable oxidation-adsorption synergistic mechanism. ‑ Simultaneous adsorption and removal of its conversion products are achieved to ensure that total iodine is removed to the required standard.

The invention discloses a sulfaguanidine modified inorganic tin-based perovskite light-emitting diode and a preparation method thereof, and belongs to the field of luminescent material preparation, the preparation method comprises the following steps: preparing a perovskite precursor solution which comprises cesium iodide, stannous iodide, sulfaguanidine and an organic solvent; applying the perovskite precursor solution to a substrate to form a wet film; carrying out annealing treatment on the wet film so as to form a perovskite light-emitting layer containing CsSnI3 perovskite and sulfaguanidine; a hole transport layer is formed on an anode conductive substrate, and a perovskite light-emitting layer is adopted on the hole transport layer; and sequentially forming an electron transport layer, an electron injection layer and a cathode electrode on the perovskite light-emitting layer. The process is simple and suitable for popularization and application.