82results about How to "Facilitate dissociation" patented technology

The invention discloses a rare earth element doped hydrogen evolution electrocatalyst and a preparation method and application thereof. The rare earth element doped hydrogen evolution electrocatalyst comprises rare earth element doped nickel oxide serving as a carrier and ruthenium atoms anchored on the carrier. According to the rare earth element-doped hydrogen evolution electrocatalyst provided by the invention, the adsorption of hydroxyl is enhanced by doping the oxyphilic rare earth element with NiO, the hydrogen conversion on the surface of Ru is promoted by a rare earth element / NiO carrier, and the rare earth element / NiO and Ru generate a definite synergistic effect to jointly promote the dissociation of water, so that the rare earth element-doped hydrogen evolution electrocatalyst shows very high catalytic activity in alkaline HER; a new thought is provided for accelerating alkaline HER reaction kinetics. In an alkaline HER test, the rare earth element doped hydrogen evolution electrocatalyst provided by the invention can reach the current density of 10mA cm <-2 > by only needing the overpotential of 38mV; and after a stability test is carried out for 50 hours, the overpotential is not attenuated.

The invention discloses a method for determining antibiotics in environmental soil, which comprises the following steps: S1, collecting fresh soil, crushing, sieving with a 0.1 mm-0. 2mm sieve, weighing 3 g-5 g of sample, and placing in a centrifuge tube; s2, adding 50-80 mL of a methanol-acetic acid-aqueous solution into the centrifuge tube, oscillating for 3-5 min, then carrying out normal-temperature ultrasonic treatment for 25-30 min, carrying out high-speed centrifugation for 10-15 min at a low temperature of 4-6 DEG C, taking a supernatant, repeatedly extracting residues twice, merging the obtained extract and the supernatant, and concentrating to 10-15 mL to obtain a concentrated solution A; s3, adding 20-25 mL of dichloromethane into the concentrated solution, repeating the extraction operation in the S2 to obtain a concentrated solution B, and adding ultrapure water into the concentrated solution B to dilute the concentrated solution B to 200 mL; and S4, adding 1-1.5 g of disodium ethylene diamine tetraacetate into the diluent obtained in S3, adjusting the pH value to 3.5, enabling the diluent to pass through a small solid-phase extraction column, eluting the small solid-phase extraction column with methanol, blow-drying under nitrogen flow, fixing the volume, passing through a filter membrane, and transferring into a sample bottle for UPLC-MS / MS determination. According to the method, the antibiotic extraction rate and the content determination accuracy are improved.

The invention provides a PVDF-PMMA (Polyvinylidene Fluoride-Polymethyl Methacrylate)-based polymer electrolyte membrane as well as a preparation method and application thereof, and belongs to the field of lithium batteries. The invention provides a PVDF-PMMA (Polyvinylidene Fluoride-Polymethyl Methacrylate)-based polymer electrolyte membrane. The PVDF-PMMA-based polymer electrolyte membrane is prepared from the following components: PVDF, PMMA, a lithium salt, an active filler and a phosphine compound, the mass ratio of the PVDF to the lithium salt is (2-15): 1; the mass ratio of the PVDF to the PMMA is (1-10): 1; the ratio of the total mass of the PVDF and the lithium salt to the mass of the active filler is (2-30): 1; the ratio of the total mass of the PVDF and the lithium salt to the mass of the phosphine compound is (5-30): 1. The polarity of the phosphine compound is high, and the phosphine compound can promote dissociation of lithium salt, so that rapid and efficient transmission of lithium ions in the PVDF-PMMA-based polymer electrolyte membrane at room temperature is promoted, and the conductivity of the PVDF-PMMA-based polymer electrolyte membrane is further improved.

The invention belongs to the technical field of hydrolysis hydrogen production, and particularly relates to a preparation method of a CoPx-CeO2 loaded platinum catalyst with a core-shell structure and application of the CoPx-CeO2 loaded platinum catalyst in seawater electrolysis hydrogen production. A Co (CO3) 0.5 (OH) nanorod precursor is prepared on foamed nickel through a hydrothermal method and then calcined to obtain CoPx, a CeO2 film is electrically deposited to obtain a CoPx-CeO2 composite carrier, and platinum is impregnated and loaded to obtain the CoPx-CeO2-Pt catalyst. The catalyst shows excellent hydrogen evolution catalytic activity in seawater, and the CoPx-CeO2 composite carrier prevents Pt nano-particles from being agglomerated through interaction of metal carriers, so that the atom utilization rate of Pt is increased. Meanwhile, the CeO2 film actively enriches OH <-> in an alkaline electrolyte to construct a local high-alkalinity microenvironment on the surface of the catalyst, Cl <-> in seawater is prevented from getting close to an active site corroding the catalyst through electrostatic repulsion, and the stability and durability of the catalyst are improved.

The invention provides a preparation method of a metal-doped cobalt-based dynamic catalyst and application of the metal-doped cobalt-based dynamic catalyst in electrosynthesis of ammonia, and belongs to the technical field of catalysts. The metal-doped cobalt-based catalyst is prepared by adopting an ion exchange and reducing atmosphere calcination method, has a self-supporting characteristic and high activity, and is directly used as an electrode in the process of electrosynthesis of ammonia, so that the reaction stability is greatly improved. Compared with the existing electrosynthesis ammonia catalyst, the metal-doped cobalt-based dynamic catalyst prepared by the invention has unique advantages in the aspects of interface water activation and nitrogen oxide conversion, and shows excellent application prospects.

The invention relates to the technical field of electrolyte, in particular to a thioether cross-linked solid polymer electrolyte membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: taking N, N-dimethylformamide, respectively adding 3, 6-dioxa-1, 8-octane dithiol and triglycidyl isocyanurate, and uniformly stirring to obtain a mixed solution; adding bis (trifluoromethylsulfonyl) imide lithium into the mixed solution, putting magnetons on a magnetic stirrer, and completely dissolving the magnetons to obtain a precursor solution; and pouring a proper amount of the precursor solution into a polytetrafluoroethylene mold, spreading, and carrying out cross-linking polymerization in a blast oven to form the film. The three-dimensional thioether cross-linked network structure has a large number of weakly coordinated thioether groups, dissociation of lithium salt can be promoted, a large number of free Li < + > is generated, the number of Li < + > is increased, meanwhile, the crystallinity of a polymer is remarkably reduced, the ionic conductivity is improved, the mechanical stability of a film can be improved, and the service life of a battery is effectively prolonged.

The embodiment of the invention provides a non-fused ring electron acceptor containing an asymmetric side chain and a preparation method and application thereof, the non-fused ring electron acceptor containing the asymmetric side chain has the following structure: # imgabs0 #, R1, R2 and R3 comprise any one of branched chain type, straight chain type or cyclic alkyl containing 1-20 carbon atoms, and A is a strong electron withdrawing functional group. According to the non-fused ring electron acceptor containing the asymmetric side chain and the preparation method and application thereof provided by the embodiment of the invention, the aryl alkylamine asymmetric structure is introduced as the side chain, so that the molecular planarity of the non-fused ring electron acceptor can be maintained, and the molecular accumulation and solubility can be conveniently regulated and controlled. Therefore, the non-fused ring electron acceptor has the advantages of good solubility, strong crystallization, high mobility, good compatibility and easiness in processing into a film; when the electron acceptor material is used for preparing an organic solar cell, the photoelectric conversion efficiency of the device can reach 16%.

This invention belongs to the field of solid-state electrolyte technology, specifically relating to a high-pressure resistant composite polymer solid-state electrolyte, its preparation method, and its application. The solid-state electrolyte comprises: a high-pressure resistant terpolymer, a PVDF-based polymer, mullite filler, and a lithium salt; the high-pressure resistant terpolymer is prepared from a high-pressure resistant additive, a crosslinking agent, ethylene ethylene carbonate monomer, and an initiator; the high-pressure resistant additive is selected from at least one of propylene-1,3-sulfonyl lactone, cyclobutene sulfone, and 3-methyl-3-cyclobutene sulfone. The preparation method is as follows: the high-pressure resistant additive, crosslinking agent, initiator, lithium salt, and ethylene ethylene carbonate monomer are mixed to obtain a precursor solution; the PVDF-based polymer and mullite filler are stirred and mixed in a solvent, coated into a film, and vacuum dried to obtain a base film; the base film is immersed in the precursor solution, and after immersion, it is cured to obtain the high-pressure resistant composite polymer solid-state electrolyte.

The present application relates to a kind of emulsion type capsule slow-release oil sand dissociation agent and its preparation method and application, belong to oil sand pitch technical field.Dissociation agent is by the water phase flocculating agent solution of volume ratio (10~30) and the oil phase containing emulsifier mixed and formed water-in-oil emulsion;Water phase flocculating agent solution includes the flocculating agent of concentration 10~100 mg / L, and the oil phase containing emulsifier includes the emulsifier of volume concentration 1~4%.By oil outer phase, the viscosity of pitch and oil-water interfacial tension are reduced, the calcium and magnesium ion concentration in system can be reduced after slow release of flocculating agent solution, and then the adhesion between pitch and silicon surface is weakened, on the basis of reducing the dosage of flocculating agent, further improve the dissociation efficiency of pitch on sand surface.It can not change the pH of system, prevent the disadvantage that the hydrophobicity of pitch is reduced and the difficulty of pitch droplet coagulation is increased by hot lye.

The application provides a method for heavy floatation and combined separation of collophanite by a multi-grain product spiral chute, wherein the collophanite is first ground and slurried, then subjected to gravity separation and grading, and the product is divided into coarse-grain product, medium-grain product and fine-grain product; the medium-grain product is returned to continue grinding, and the coarse-grain product and the fine-grain product are respectively subjected to reverse flotation treatment. The application adds a medium-grain product to the common double-product gravity separation process, and the product is mostly un-dissociated dolomite. Since the physical difference in specific gravity between the apatite and the dolomite in the collophanite is small, the coarse-grain dolomite has a great influence on the grade of the coarse-grain product of the gravity separation, so the application returns the medium-grain product to the ball mill for secondary dissociation, so that the mineral processing process is simple, the operation cost is low, the separation effect is improved, the product index of the phosphate concentrate is optimized, and the rational utilization of the phosphate rock resources is realized.

The application discloses a polymer electrolyte for a lithium metal battery and a preparation method and application thereof, and relates to the technical field of battery electrolyte materials. + The desolvation energy barrier at the electrode interface is reduced, the ionic conductivity of the electrolyte is significantly enhanced, and the lithium ion can be guided to form a stable solid electrolyte interface film in cooperation with the lithium ion, so that the uniform lithium ion flow is achieved, the uncontrollable growth of lithium dendrites is significantly inhibited, the side reaction consumption of the electrolyte in the cycle process is greatly reduced, and the long-period stability of the battery is effectively ensured, and the application is suitable for large-scale popularization and application in lithium metal batteries.

The invention relates to a tranexamic acid oral dissolving system for improving bioavailability, which relates to the technical field of medicines and comprises a tranexamic acid oral dissolving film and a tranexamic acid oral dissolving tablet. The design of the oral dissolving tablet and the oral dissolving film fully considers the requirements of different patient groups and the characteristics of medicine absorption, the characteristic that the oral dissolving tablet can be taken without water improves the compliance of patients, the problem that traditional tablets are difficult to swallow is solved, and the oral dissolving tablet and the oral dissolving film have very good application prospects for patients who often travel or need to take medicine under the anhydrous condition. An orally disintegrating system has good convenience; the tranexamic acid oral dissolution system can be rapidly disintegrated in the oral cavity, so that the medicine is rapidly dispersed, the contact area with the oral mucosa is increased, the medicine is promoted to be absorbed through the oral mucosa tissue and other pregastric regions, the bioavailability is improved, and the medicine absorption speed is increased.

The present application relates to copper electrolysis technical field, specifically relates to a kind of high arsenic anode copper electrolytic refining method and device;Sulfuric acid and copper sulfate aqueous solution are configured as electrolyte, and four-component complex additive is added to the electrolyte, and arsenic is controlled by four-component complex additive in cooperation;Electrolyte is circulated and dearsenicated in multistage settlement and filtration dearsenication device, electrolyte is treated in the process of circulation, and arsenic and arsenic compound in electrolyte are separated;The present application solves the technical problem of how to remove arsenic in the process of electrolytic refining.

This invention discloses the application of a carbon-modified noble metal catalyst in the low-temperature combustion of propane or mixed alkanes. The carbon-modified noble metal catalyst is prepared by adding sodium hydroxide solution dropwise to a cerium salt solution, mixing, and reacting to obtain a cerium dioxide support. The cerium dioxide support is then impregnated in an equal volume of noble metal salt solution, dried, and calcined. The calcined product and glucose are added to deionized water, mixed, and subjected to a hydrothermal reaction, followed by drying and calcination to obtain the final product. In this invention, carbon species exist in the form of doping or interstitial filling, inducing lattice distortion and a high concentration of surface oxygen vacancies in the support, significantly improving the mobility of lattice oxygen and the reactivity. Simultaneously, the interfacial carbon species optimize the microelectronic environment of the active center through strong electron interactions, maintaining the low valence state of Ru and the metallic states of Pt and Pd. This catalyst effectively avoids the shielding effect of the carbon layer and exhibits excellent catalytic combustion activity and stability for propane and mixed alkanes at low temperatures.

The invention belongs to the field of solid electrolytes, and particularly relates to a PVDF (polyvinylidene fluoride)-based organic-inorganic composite polymer solid electrolyte as well as a preparation method and application thereof. The solid electrolyte comprises PVDF, a lithium salt, an active filler and an organic additive, the mass ratio of the PVDF to the lithium salt is (1-20): 1, the ratio of the total mass of the PVDF and the lithium salt to the mass of the active filler is (3-30): 1, the ratio of the total mass of the PVDF and the lithium salt to the mass of the organic additive is (2-20): 1, and the organic additive is a hydrazine compound. According to the invention, the hydrazine organic small molecule additive is introduced, so that the ionic conductivity of the PVDF-based organic-inorganic composite solid electrolyte at near room temperature can be effectively improved. The small organic molecules and the lithium salt form a high-performance interface layer in situ, so that the interface compatibility of the organic-inorganic composite solid electrolyte and the lithium metal is remarkably improved, and the mechanical strength of the organic-inorganic composite solid electrolyte is improved.

A preparation of a PEO-based polymer solid electrolyte based on inorganic-organic hybrid molecular functional additives, wherein the polymer solid electrolyte is composed of polyethylene oxide (PEO), inorganic-organic hybrid molecular materials, and lithium salts. The method is prepared by stirring the precursor slurry, casting, hot pressing film forming and other steps. The method is simple and feasible and easy to scale up. The addition of functional additives makes the polymer solid electrolyte membrane both rigid and flexible, giving the solid electrolyte and the electrode excellent interface compatibility, and promoting the stable deposition / stripping of ions. The specific groups in the inorganic-organic hybrid molecular material can interact with the lithium salt anions, promote the dissociation of the lithium salt, increase the number of carriers, and thus improve the ionic conductivity of the solid electrolyte. Therefore, the room temperature ionic conductivity of the polymer solid electrolyte can reach 10 ‑4 S cm ‑1 , which can be applied to all-solid-state lithium battery systems.

The invention discloses an environment-friendly high-performance titanium alloy polishing composition as well as a preparation method and application thereof, and relates to the technical field of metal material surface treatment. According to the environment-friendly high-performance titanium alloy polishing composition, the pH value of a basic system is adjusted to 9.5-10.0 through a pH adjusting agent; the base system comprises the following components in percentage by mass: 10-30% of silica sol, 3-4% of an anti-gel stabilizer (urea or methylurea), 2-3% of a heat transfer improvement and surface defect inhibitor (ethylene glycol or propylene glycol), 0.1-0.2% of a wetting leveling agent, 1-2% of an alcohol amine complexing agent and 0.5-1% of an aminopolycarboxylic acid chelating agent besides water. According to the environment-friendly high-performance titanium alloy polishing composition, on the premise that an oxidizing agent is completely abandoned, perfect balance of high stability, high polishing rate and excellent surface quality is achieved through unique formula design, and the environment-friendly high-performance titanium alloy polishing composition has the advantages of being environmentally friendly and high in safety.

The present application relates to the technical field of gel electrolyte for supercapacitor, in particular to a gel electrolyte based on lysozyme amyloid fibers and application thereof. The ion conductivity of the conventional plant protein-based gel electrolyte is poor, and the electrical performance needs to be further improved. In view of the above problems, the present application provides a gel electrolyte based on lysozyme amyloid fibers. The lysozyme in the formula self-assembles into amyloid fibers under acidic conditions, and the surface of the amyloid fibers is rich in polar groups such as hydroxyl, carboxyl and amino groups, which can effectively promote the dissociation of lithium salt. At the same time, the three-dimensional network structure formed by the self-assembly of the fibers. Glycerol as a small molecule plasticizer inserts between the polymer chains. Lithium perchlorate and other lithium salts can provide high concentration of free lithium ions due to the large anion volume and low dissociation energy. The above components synergize and jointly act, effectively improving the comprehensive electrical performance of the gel electrolyte.

The invention relates to the technical field of dangerous solid waste treatment and resource utilization, in particular to an aluminum electrolysis overhaul slag fluoride enhanced leaching and resource recycling method. Comprising the following steps: adding pretreated overhaul slag into a complexing reaction solution of boric acid containing a dispersing agent and gluconate, and pulping; sealing the system, heating, and implementing pulse type micro-negative pressure degassing operation in which vacuumizing and normal pressure recovery are alternated during constant-temperature leaching; after the reaction is finished, carrying out thermal-state solid-liquid separation and tailing washing, and merging to obtain clear filtrate; crystal seeds are added into the filtrate, an aluminum source solution is dropwise added, the pH value is increased, solid-liquid separation is performed after constant-temperature curing, and synthetic cryolite is obtained; and supplementing the pH buffer agent to the clear liquid and then circularly returning to the liquid preparation process. According to the method, fluorine and aluminum are cooperatively extracted under the weak acid condition, generation of silicic acid gel is inhibited, equipment corrosion is reduced, mass transfer in pores is enhanced in combination with micro-negative pressure operation, and low-energy-consumption recovery of fluoride salt and closed-loop circulation of a working solution are achieved through pH regulation and control.

The invention provides a hydroxide-loaded noble metal particle composite catalyst, a preparation method thereof and an application of the hydroxide-loaded noble metal particle composite catalyst in an electrochemical denitration ammonia production reaction, the hydroxide-loaded noble metal particle composite catalyst comprises a foam metal substrate, a metal hydroxide nanosheet array is crystallized on the surface of the foam metal substrate, precious metal particles are attached to the surface of the metal hydroxide nanosheet array. The composite catalyst of the oxide-loaded noble metal particles is an integrated self-supporting electrode, so that a binder required in the process of preparing an electrode by using a traditional powder catalyst, tedious preparation of catalyst slurry and a coating process are avoided, and meanwhile, the structural stability of the catalyst is improved.

This invention discloses a solid-state electrolyte and a solid-state battery for the field of backup power and energy storage, belonging to the field of battery manufacturing technology. The solid-state electrolyte for backup power and energy storage comprises the following components by weight: 30-40 parts polymer matrix, 18-30 parts lithium salt, 0.8-1.3 parts lithium salt promoter, 1-4 parts binder, 18-26 parts tetrahydrofuran, and 0.8-2.3 parts conductive additive. The solid-state electrolyte prepared using the above substances exhibits excellent ionic conductivity, electrochemical stability, and safety, and its parameters are suitable for backup power and energy storage applications.

The invention discloses a polyurea-based gel polymer electrolyte, a synthesis method thereof and application of the polyurea-based gel polymer electrolyte in a lithium battery, and belongs to the technical field of lithium batteries. A mixture containing a polyureido polyalkenyl monomer, an electrolyte and an initiator is subjected to thermal initiation polymerization reaction to obtain the polyureido gel polymer electrolyte, and the polyureido gel polymer electrolyte integrates ureido functional groups, flame-retardant structural units and coordination polar groups and has a covalent cross-linked network and a dynamic hydrogen bond network at the same time. The composite material shows excellent mechanical properties and ion transmission capability, has intrinsic flame-retardant characteristics, and is especially suitable for preparing high-safety gel-state lithium metal batteries, lithium ion batteries and other electrochemical devices.

The invention discloses a herbal compound anti-wrinkle spot-fading moisturizing mask and a preparation method thereof, and relates to the technical field of cosmetic processing. The herbal compound anti-wrinkle spot-fading moisturizing mask is composed of essence and two-phase permeation antibacterial film cloth, the essence is prepared from a proteoglycan protein peptide nanocomposite, synergistic liposome, a lucid ganoderma extract, a rhodiola rosea extract, a ginseng extract, a semen cuscutae extract, glycerin, hydroxyethyl cellulose, p-hydroxyacetophenone and deionized water. The essence is loaded in the biphasic permeation antibacterial film cloth, fat-soluble and water-soluble active substances in the essence can permeate and immerse into skin through gradient permeation and multistage pore channels, the permeability of the active substances is improved, and under further delivery of nano-particles and lipidosome, the synergistic skin care effect of multiple components is remarkably improved; the anti-wrinkle, freckle-fading and moisturizing effects are effectively improved, and meanwhile, the anti-wrinkle, freckle-fading and moisturizing composition has excellent antibacterial property and can reduce skin sensitivity and inflammatory response.

The application discloses a kind of catalysts for hydrogen storage material and its preparation method and application, belong to hydrogen storage material and its preparation technical field.The present application is to solve the problems such as high dehydrogenation temperature of existing magnesium-based solid hydrogen storage material and slow low-temperature kinetics.The present application is prepared by using nickel chloride hexahydrate, acetylacetone manganese, polyether P123, polyether P127, dopamine hydrochloride, 1,3,5-trimethylbenzene and ammonia as raw materials to obtain carbon as carrier wrapped with elemental Ni nanoparticle catalyst with a large number of edge dislocations, and is applied to Mg-based hydrogen storage material by ball milling method.The introduced dislocation has a dual role: not only directly accelerates the dissociation of H2 molecule, but also indirectly improves the activity of catalytic phase (Mg2NiH4 / Mg2Ni).The preparation process of the composite hydrogen storage material provided by the present application is simple and mature, and the raw materials are cheap and easy to obtain, only a small amount of MNC needs to be added to greatly improve the hydrogen storage performance of Mg, and it is convenient for large-scale industrial production.

This invention discloses a metal-nucleic acid coordination nanosystem, its preparation method, and its application. The preparation process of the nanosystem is as follows: CuCl2 solution, MnCl2 solution, siRNA solution, and EGCG solution are mixed and reacted at 37°C with stirring to obtain preliminary nanoparticles, denoted as Cu-Mn-siRNA; the obtained Cu-Mn-siRNA nanoparticles are mixed with PEI solution and co-incubated for surface coating. After purification, the final target nanomaterial is obtained, denoted as Cu-Mn-siRNA@PEI. After entering tumor cells, the surface-modified PEI enhances the interaction between the nanoparticles and the negatively charged cell membrane through its positive charge, thereby promoting the internalization and uptake of the nanosystem by the cells. Under the high GSH environment within the cells, the coordination structure dissociates, releasing Cu... 2+ Mn 2+ And siGPX4. This nanosystem integrates the catalytic function of bimetallic ions, the gene silencing function of siRNA, the coordination-assisted function of EGCG, and the delivery and stabilization function of PEI, achieving synergistic therapy of "reactive oxygen species generation + target gene silencing".

This invention discloses a binder, its preparation method, and its application. The binder comprises the following raw materials: a compound containing soft segments, a compound containing hard segments, and a chain extender. The compound containing soft segments includes polyether polyols and polyester polyols, wherein the polyether polyols are end-capped with amino or hydroxyl groups, and the polyester polyols are end-capped with amino or hydroxyl groups. The compound containing hard segments is a diisocyanate, and the chain extender is a chain extender containing phenolic groups. This binder helps solve the interface problem of the positive electrode during battery operation and is expected to improve the cycle life and stability of the battery.

The application discloses a sodium-ion battery electrolyte with a flame-retardant function and a preparation method and application thereof, and comprises the following components in parts by weight: 80-100 parts of a solvent, 18-26 parts of a sodium salt and 1-10 parts of an enhanced flame retardant; the preparation raw materials of the enhanced flame retardant comprise modified nano silicon dioxide; the preparation raw materials of the modified nano silicon dioxide comprise nano silicon dioxide, tannic acid and polyethylene imine. The application provides the sodium-ion battery electrolyte with the flame-retardant function and the preparation method and application thereof; the nano silicon dioxide has good thixotropy, fluidity and thickening property; the organic solvent can improve the dispersibility of the nano silicon dioxide in the electrolyte, makes the electrolyte more stable, and has excellent flame-retardant property.

The present invention provides a charging roller for an electrophotographic device, which suppresses an increase in resistance and exudation of an ion conductive agent during endurance of energization. A charging roller (10) for an electrophotographic device is provided with a shaft body (12) and an elastic body layer (14) formed on the outer peripheral surface of the shaft body (12), wherein the elastic body layer (14) contains the following (a) to (c). The content of (c) is preferably 0.1-5.0 parts by mass (inclusive) based on 100 parts by mass of (a). It is preferable that the content of (b) is 0.5-3.0 parts by mass (inclusive) based on 100 parts by mass of (a). (a) A chlorohydrin rubber having a chlorine content of 14-19% (inclusive). And (b) an ion conductive agent. And (c) a salt of a cyclic amidine compound.

The invention discloses a photocatalytic material with a heptazine-triazine structure as well as a preparation method and application of the photocatalytic material. Relates to the field of photocatalysis. The photocatalytic material with the heptazine-triazine structure comprises a boron-doped heptazine-triazine heterojunction structure, and the content of a triazine unit in the heptazine-triazine heterojunction structure is higher than that of a heptazine unit; the raw material of the boron-doped heptazine-triazine heterojunction structure comprises the following components: a boron-containing carbon nitride precursor and alkali metal salt, the raw materials of the boron-containing carbon nitride precursor comprise melamine and a boron source. The photocatalytic material shows excellent performance under visible light, the H2O2 yield can reach 2423 mol L <-1 > h <-1 > (44.1 times of that of traditional carbon nitride), and the hydrogen evolution rate is increased by 70 times; the apparent quantum yield of 450nm single wavelength reaches 14.4%, and the visible light absorption range is effectively expanded; and after continuous 24-hour illumination, the activity is not attenuated, and the stability is excellent.

The invention belongs to the technical field of lithium battery diaphragms, and relates to a cation covalent organic framework nanofiber diaphragm and a preparation method and application thereof.The preparation method comprises the following steps that firstly, covalent organic framework powder with triple-bond side chains is prepared through a Schiff base reaction; then preparing a cationic covalent organic framework (ICOFs) through a click reaction, finally blending the ICOFs and polyacrylonitrile, and preparing the ICOFs-loaded nanofiber diaphragm through an electrostatic spinning method. The ICOFs nanofiber diaphragm prepared by the invention has high porosity, and can effectively inhibit the transmission of anions, promote the dissociation of lithium salt and improve the ionic conductivity and the selectivity of lithium ions, and in addition, the quasi-solid-state lithium battery based on the ICOFs nanofiber diaphragm has excellent rate capability and safety performance.