45results about How to "With quantum size effect" patented technology

The invention discloses a backlight module of a display device and a white light LED. The backlight module comprises a lamp bar and a light guide plate, wherein the lamp bar is provided with a plurality of ultraviolet light LEDs, and the light-entering face of the light guide plate and the ultraviolet light LEDs are arranged oppositely. A path of the process from light emitted by the ultraviolet light LEDs to the light shot from the light-exiting face of the light guide plate at least comprises an RGB quantum dot fluorescent powder layer. The RGB quantum dot fluorescent powder layer comprises a red light quantum dot fluorescent screen, a green light quantum dot fluorescent screen and a blue light quantum dot fluorescent screen, wherein the red light quantum dot fluorescent screen, the green light quantum dot fluorescent screen and the blue light quantum dot fluorescent screen are sequentially arranged. The RGB quantum dot fluorescent powder layer generates high-purity white light under excitation of ultraviolet light emitted by the ultraviolet light LEDs. As the RGB quantum dot fluorescent powder layer is formed by sequentially arranging the red light quantum dot fluorescent screen, the green light quantum dot fluorescent screen and the blue light quantum dot fluorescent screen, color saturation of the backlight module is improved, and the problem of reabsorption of RGB quantum dot fluorescent powder is solved.

The invention provides a method for preparing a magnetic hydrophobic modified cationic polyacrylamide oil-removing flocculating agent and belongs to the technical field of environmental-friendly water treatment. The method comprises the following steps: dissolving dodecyl glucoside (or cocoanut fatty acid diethanolamide), dimethyl diallyl ammonium chloride, acrylamide and a photoinitiator in water, regulating the pH value, introducing nitrogen and sealing the reactor, performing photopolymerization under a low-voltage ultraviolet lamp so as to produce lacteous colloid; and dissolving the colloid in ultrapure water, adding magnetic nanometer iron oxide particles and ammonium persulfate to stir, washing, drying, grinding, and finally obtaining the black powdered oil-removing flocculating agent. According to the method disclosed by the invention, the polymerization time is short, the reaction temperature is low, condensation cooling is not needed, and energy conservation and consumption reduction are realized; due to the introduction of a hydrophobic monomer, the hydrophilic property of the flocculating agent is reduced, the adsorptive property of oil substances is enhanced, and the demulsification ability of the flocculating agent is enhanced; and due to the introduced magnetic nanometer iron oxide particles, under the action of an additional magnetic field, the flocculating agent is high in settling speed and easy to separate.

The invention discloses a flame-retardant and wear-proof corrugated case. The flame-retardant and wear-proof corrugated case comprises a case body composed of a corrugated paperboard. The paperboard sequentially comprises surface paper, corrugated paper and inner paper from outside to inside, and the surface paper, the corrugated paper and the inner paper are boned through oxidized starch, a vapor phase inhibitor is added into the oxidized starch, the surfaces of the surface paper and the inner paper are coated with a flame-retardant and wear-proof coating, and the coating is prepared from, by weight, 30-40 parts of phenolic resin, 10-15 parts of nanometer Sb2O3-Al(OH)3, 10-20 parts of nanometer wear-proof powder, 1-3 parts of a reactive diluent, 0.5-2 parts of an antifoaming agent, 2-5 parts of a penetrating agent, 0.5-1 part of an antioxidant, 10-20 parts of an organic solvent and 10-20 parts of a curing agent. According to the flame-retardant and wear-proof corrugated case, as cashew-nut-shell-oil-or-tripolycyanamide-modified phenolic resin is applied to the surface of the paper case, the quite-high wear-proof performance and the quite-high mechanical performance are achieved; meanwhile, the wear-proof nanometer powder is added into the coating, the wear-proof capacity of the surface of the paper case is enhanced, and a nanometer aluminum hydroxide is used as a flame retardant to achieve the aim of reducing the using amount and improving the flame-retardant performance.

The invention discloses a high-temperature-resistant corrosion-resistant coating for an engineering machinery tail gas pipe. The coating comprises the following components in percentage by weight: 55 to 65 percent of organic silicon epoxy resin polymer, 1 to 2 percent of salt mist resistant aid, 6 to 10 percent of copper ferrochrome black, 2 to 5 percent of nano zinc oxide, 6 to 3 percent of flaky mica powder, 7 to 4 percent of aluminium trippolyhosphate, 0.1 to 0.4 percent of leveling agent, 0.2 to 0.6 percent of defoaming agent, 0.2 to 0.6 percent of dispersing agent, 4 to 6 percent of talcpowder and 18.5 to 3.4 percent of dimethylbenzene. The bond strength of the coating to a substrate is obviously improved; high temperature resistance can reach 500 DEG C; the coating can resist salt mist corrosion for 48 to 72 hours; and the coating is still black and is slightly faded after being roasted at the temperature of 500 DEG C for 100 hours. The coating is convenient to construct and operate, has wide material sources, and can be applied to resisting corrosion on the outer surfaces of various kinds of steel structure high-temperature equipment, engineering machinery tail gas pipes and steel structure high-temperature chimneys.

A method for preparing a CuO nano-film includes steps: dripping NaOH aqueous liquor into Cu(NO3)2 liquor and obtaining blue flocculent precipitates after heating and reaction; placing washed, dried and ground blue powder into a crucible and roasting the crucible in a muffle furnace to obtain black CuO powder; dissolving the CuO powder in solvent and obtaining CuO liquor after centrifugal separation; and spin-coating the CuO liquor on the surface of a substrate by a spin-coating method and obtaining the CuO nano-film after drying and annealing. The method has the advantages that the method for preparing the CuO nano-film is simple in process and low in cost, and is environment-friendly, and the CuO nano-film can be obtained without the aid of special equipment, realizes a surface effect, a quantum size effect, a volume effect and macroscopic quantum tunneling effect, displays excellent physical and chemical properties in terms of magnetism, heat resistance, light absorption, chemical activity, catalyst, melting point and the like as compared with common CuO, and becomes one of organic materials with wide application.

The invention belongs to the field of fine chemical engineering, and particularly relates to a high-valence silver antibacterial agent and a preparation method thereof. The high-valence silver antibacterial agent is a silver-polyhexamethylene biguanidine complex with the electric potential zeta larger than 0. A metal part of the silver-polyhexamethylene biguanidine complex is Ag3+, and the antibacterial property of the complex is 200 times that of Ag+. A biological acceptable part is polyhexamethylene biguanidine (PHMB), compared with other guanidines with small molecular weights, the antibacterial property is good, the advantages are more obvious because of the synergistic antibacterial effect of PHMB and other antibiotics, and toxicity to cells and tissue of human bodies is smaller. The nanoscale or micron-size Ag(III)-PHMB complex high in antibacterial activity is prepared by means of reversed-phase microemulsion or the aqueous solution environment. On one hand, the Ag(III)-PHMB complex can reduce toxicity, and on the other hand, the metal part and the biological acceptable part achieve the synergistic antibacterial effect so that the antibacterial property of the antibacterial agent can be effectively improved. The antibacterial agent has a great significance in treatment of human epidermis infection.

The invention discloses a preparation method and application of water-soluble titanium dioxide nanoparticles. According to the preparation method, beta-cyclodextrin is used as an initial reaction material, a macroinitiator is synthesized by means of modification, a multi-arm star-shaped block copolymer is prepared by using an atom transfer radical polymerization (ATRP) technology and a technologywhich combines ATRP with 'click' chemistry, and the water-soluble titanium dioxide nanoparticles with uniform sizes and good dispersibility are prepared by taking the multi-arm star-shaped block copolymer as a monomolecular micelle template on the basis of a solution phase synthesis method. The titanium dioxide nanoparticles prepared by the preparation method are stable in quality, uniform in particle sizes, and can be stabilized at a nanoscale; the properties of the titanium dioxide nanoparticles can be effectively enabled to be exerted. The surfaces of the titanium dioxide nanoparticles aremodified, so that the titanium dioxide nanoparticles can be enabled to be evenly dispersed in water, and an aggregation effect is further avoided.

The invention relates to a preparation method of a fully-inorganic cesium-lead-halogen perovskite nanocrystalline film. The method includes 1) fully mixing DMF, oleic acid and oleylamine to obtain a mixed solution; 2) adding CsX and PbY2 separately into the mixed solution of the step 1), then stirring, standing and performing centrifugation to obtain a precursor solution; 3) washing drying and heating a film substrate sequentially, then spraying the precursor solution onto the film substrate when the substrate is still hot to obtain the fully-inorganic cesium-lead-halogen perovskite nanocrystalline film, wherein X and Y are one or more of Cl, Br and I. Compared with the prior art, the method can rapidly achieve one-time film formation, has the advantages of simple operation and low cost, and the prepared nanocrystalline film has advantages of uniform distribution, high crystalline quality, and good luminous performance, and has broad application prospects.

The invention relates to an anti-static floor coating and a method for preparing the same. The anti-static floor coating is prepared from components in percentage by mass as follows: 50wt%-70wt% of water, 2wt%-4wt% of a wetting dispersant, 0.5wt%-1wt% of a silicon modified defoamer, 0.5wt%-1wt% of a foam inhibitor, 0.05wt%-0.1wt% of a PH neutralizer, 0.3wt%-1wt% of a thickener, 10wt%-25wt% of pigment and filler, 0.5wt%-1wt% of a single-walled carbon nanotube, 15wt%-25wt% of resin emulsion, 0.2wt%-0.3wt% of an antiseptic fungicide and 0.5wt%-2wt% of a waterborne leveling agent, wherein the sumof mass percentages of the components is 100%. The single-walled carbon nanotube is applied to the anti-static floor coating, so that adding quantity of a conductive material is reduced greatly whilethe anti-static effect is realized, a conductive way, constructed on the basis of the conductive material, of the coating is replaced, coating thickness of the coating is reduced, conductive stabilityis improved, construction use amount and maintenance cost of the coating are reduced, the anti-static performance is excellent and lasting and is not affected by time, temperature and humidity, and film surface is smooth, attractive, wear-resistant, pressure-resistant and impact-resistant.

The invention belongs to the technical field of environment-friendly coatings and relates to an environment-friendly coating for an exterior wall and a preparation method thereof. The environment-friendly coating for the exterior wall comprises the following raw materials in parts by weight: 40 to 50 parts of an acrylic emulsion, 20-30 parts of polyether polyol, 20-30 parts of a filler, 10-20 parts of carboxymethyl betaine, 5-10 parts of isocyanate, 5-10 parts of ceramic fibers, 5-10 parts of nanometer silicon dioxide, 5-8 parts of a surfactant, 3-6 parts of a plasticizer, 1-3 parts of a drying agent, 1-2 parts of an anti-aging agent and 0.5-1 part of an anti-ultraviolet agent, wherein the anti-aging agent is prepared from zirconium oxide, nanometer titanium dioxide and modified graphene according to a mass ratio of (10-5): (4-8): 1. The environment-friendly coating is non-toxic, odorless, green and safe, has good elasticity, flexibility, waterproofness, aging resistance, abrasion resistance and ultraviolet resistance, short curing time, good hardness and long service life, can be directly painted, and is convenient to operate and applicable to exterior walls.

The invention belongs to the technical field of dechlorination and particularly relates to a normal-temperature gas-phase dechlorinating agent, a preparation method therefor and an application of thenormal-temperature gas-phase dechlorinating agent. The dechlorinating agent comprises a support and active ingredients, wherein the active ingredients comprise CaO and CuO, the support comprises bentonite and alkali modified fly ash, and the alkali modified fly ash is alkali solution modified fly ash. The preparation method disclosed by the invention comprises the steps of mixing calcium hydroxide, copper oxide, bentonite and the alkali modified fly ash, adding a binder into the mixture, carrying out strip extruding, carrying out drying, and carrying out roasting, thereby preparing the dechlorinating agent. The dechlorinating agent obtained by using the preparation method can achieve a dechlorination function at normal temperatures and has relatively high dechlorination accuracy and penetrating chlorosity.

The invention provides a detection method for a core-shell quantum dot-based flexible coupled marker immunochromatography test strip, belonging to the technical field of an immunodetection method. According to the method, based on the fact that the core-shell quantum dot has the characteristics of being wide in exciting line, narrow in emission spectrum line, high in quantum size effect and fluorescent quantum efficiency and strong in photochemical stability, quantum dots and protein G or protein A molecules are subjected to covalent linkage by adopting an EDC condensation mode, the flexible coupling of the quantum dots and antibody molecules can be realized by utilizing protein G or protein A molecules as bridges and by means of the specificity of Fc terminal of an antibody, antigenic determinant part of the antibody is not occupied, the antigen immunity activity of the antibody can be greatly improved, and the sensitivity and specificity when the marker product is utilized for immunodetection can be greatly enhanced.

The invention provides a method of preparing nano-silicon fungi type magnetic aerobic granular sludge and an application. The preparation method comprises the steps that ferroferric oxide nano balls are diluted in distilled water, ultrasound is conducted on the mixed liquid of absolute ethyl alcohol and thick ammonia, tetraethoxysilane and magnetic ferroferric oxide nano ball / silicon dioxide are dripped in; in a sequence batch type active sludge reactor, magnetic ferroferric oxide nano ball / silicon dioxide and fungi are added into an active sludge system, to prepare and form modified aerobic granular sludge; the modified aerobic granular sludge is immersed in modified solution of ferric chloride, and oscillated under constant temperature and repeatedly washed with deionized water, and the nano-silicon fungi type magnetic aerobic granular sludge is obtained, then sedimented. The usage of granular sludge comprises the steps that after the waste water is filtered by a grille, the pH value is adjusted to neutral, then added with nano-silicon fungi type magnetic aerobic granular sludge, and precipitated. The prepared nano-silicon fungi type magnetic aerobic granules are high in the forming efficiency, the wastewater nitrogen and phosphorus removal capability is good.

The invention discloses a method for growing lead zirconate titanate (PZT) nanorings by using the pulsed laser deposition (PLD) technology. The PLD method is used, and preparation of the PZT nanoringsis realized by precisely controlling the deposition temperature, the annealing temperature, annealing time, the number of laser pulses, oxygen pressure and other parameters. The method can be used for preparing regularly arrayed PZT nanorings, parameter control is simple and convenient, repeatability is high, and no toxic and harmful exhaust gas is emitted. The method provides a possibility for the application of high-density ferroelectric memory devices in the future.

The invention discloses a manufacturing method and application of a nano diamond and myohemoglobin modification based electrochemical enzyme sensor. The manufacturing method comprises the following steps: firstly, weighing and adding a proper amount of graphite powder and ion liquid into a mortar, sufficiently grinding to uniformly mix, filling into a glass electrode tube to compact, internally inserting a copper wire as a guide wire, thereby manufacturing a carbon ion liquid electrode (CILE); dispersing nano diamond (ND) into deionized water to prepare dispersion liquid of different concentrations, performing ultrasonic treatment for 2-3 hours to disperse uniformly, taking and dropwise coating a certain volume of nano diamond dispersion liquid to the surface of CILE, and drying in air atthe room temperature to obtain ND / CILE; fixing myohemoglobin (Mb) to the surface of ND / CILE to dry in air at the room temperature to obtain Mb / ND / CILE; and coating a Nafion alcohol solution to the surface of Mb / ND / CILE, and drying in air at the room temperature to obtain the electrochemical enzyme sensor (Nifion / Mb / ND / CILE). Nifion / Mb / ND / CILE is further taken as a working electrode for being applied to electrochemical detection of targets such as trichloroacetic acid, sodium nitrite and hydrogen peroxide, so that the effective and accurate measurement can be realized, detection response time is short, detection limit is low, linear range is wide, and the stability is good.

The invention relates to a metal dot color optical filter, a manufacturing method thereof and a liquid crystal display device. The metal dot color optical filter comprises a green light metal dot material with a fluorescence peak close to 530 nanometers or a red light metal dot material with a fluorescence peak close to 635 nanometers, wherein the particle size of the green light metal dot material and the particle size of the red light metal dot material are less than 2 nanometers. The manufacturing method of the metal dot color optical filter comprises the steps of: step 10, preparing the green light metal dot material; step 20, preparing the red light metal dot material; and step 30, preparing the metal dot optical filters by using the green light metal dot material and the red light metal dot material respectively. The liquid crystal display device comprises the metal dot color optical filter. The metal dot material adopted by the metal dot color optical filter has a quantum size effect, and the light color is simple to adjust; the adopted metal dot material has good solubility and can be prepared into ink; and the adopted metal dot material is simple to synthesize, free of toxic elements such as lead and cadmium, environmentally friendly, low in cost and suitable for commercial application.

The invention relates to a preparation method of an antibacterial waterborne wood composite coating, and belongs to the technical field of wood coatings. The antibacterial waterborne wood composite coating is prepared by taking the waterborne polyurethane emulsion as a matrix emulsion and adding the nano-silver sol and the modified nano-zinc oxide, wherein a coating film formed by the waterborne polyurethane emulsion has good physical and mechanical properties, cold resistance and organic solvent resistance, a silver element and a zinc element have a micro-power effect, and the antibacterial waterborne wood composite coating has good antibacterial property. According to the method, bacteria can lose division and proliferation capacity and die by virtue of reservoir enterprise force, nano-silver can play a role of a catalytic active center, under the action of light, silver and water or air act, and generated active oxygen ion free radicals and hydroxyl free radicals have extremely high chemical activity and can react with the bacteria to destroy a DNA double-helix structure, so that the DNA double-helix structure is damaged, metabolism is disordered, and the effect of inhibiting or killing bacteria is achieved.

The invention relates to a method for modifying a flame-retardant ethylene-vinyl acetate copolymer by a sol-gel method, and belongs to the technical field of flame-retardant materials. The method comprises the following steps of reacting and extruding by the sol-gel method, so as to prepare the ethylene-vinyl acetate copolymer / silicon dioxide master batch; melting and extruding the ethylene-vinylacetate copolymer, a compatilizer, an inorganic flame retardant, the ethylene-vinyl acetate copolymer / silicon dioxide master batch, a processing additive and other raw materials in a double-screw extruder; cutting particles, and performing injection molding, so as to obtain the ethylene-vinyl acetate nanometer flame-retardant composite material. The ethylene-vinyl acetate nanometer flame-retardantcomposite material has the advantages that the difficult-processing problem and the health problem due to adding of vapor-phase silicon dioxide are solved; the flame-retardant agent is well dispersedin the material, the heat release rate and smoke release amount of the composite material are smaller, the condensed phase is effectively promoted to form carbon, the flame-retardant property is effectively improved, and the good popularization and application value is realized.

The invention discloses a La-doped TiO2 nano-catalysis material used for low-temperature plasma catalysis synergistic effect. The La-doped TiO2 nano-catalysis material is prepared by the following steps: slowly adding absolute ethyl alcohol into butyl titanate; stirring and then adding polyethylene glycol, and continuing to stir to obtain a solution A; sequentially adding lanthanum nitrate and nitric acid into a mixed solution of the absolute ethyl alcohol and de-ionized water and controlling the pH to be 2-3 to obtain a solution B; dripping the solution B into the solution A and stirring to obtain TiO2 sol; sealing the TiO2 sol for a certain period of time to prepare a film; taking a ceramic electrode material as a base for plating the film; after plating the film, drying in a drying oven; repeatedly carrying out film plating and drying operation for 5 times to obtain a ceramic electrode base coated film; putting the ceramic electrode base coated film into a box type furnace and preserving heat at 20 DEG C for 0.5 hour; and preserving heat at 450 DEG C for 0.5 hour to obtain the La-doped TiO2 nano-catalysis material. According to the La-doped TiO2 nano-catalysis material, a technological flow is simple and convenient, industrial production is convenient to realize and the catalytic effect is good; and the degradation rate on benzene is 86% and is improved by 30% compared with that of a pure ceramic electrode material.

The invention discloses a nanoparticle static blasting agent for exploiting shale gas and relates to the field of shale gas exploitation. The blasting agent is prepared from the following raw materials in parts by weight: 80 to 90 parts of matrix material and 10 to 20 parts of crystal grain binding material, wherein the matrix material is calcium oxide of which the grain size is smaller than 100nm, and the crystal grain binding material is a nano mixed oxide of which the grain size is smaller than 80nm. The method comprises the following steps of A, preparing a mixed raw material; B, mixing: uniformly mixing the matrix material, the crystal grain binding material and a proper amount of water; C, grinding: feeding into a ball mill for grinding to obtain aggregated particles; D, screening: screening to obtain granules with 20 to 30 meshes and high roundness; E, firing: feeding the screened granules into a kiln for firing to obtain the nanoparticle static blasting agent for exploiting the shale gas. The nanoparticle static blasting agent disclosed by the invention has the characteristics of uniform blasting expansibility, short and stable blasting time, high working efficiency, simplicity in construction, safety, environmental protection, good fracture effect, low cost and the like, and is easy for popularization and use.

The invention belongs to the technical field of dechlorination, and in particular relates to a normal-temperature gas-phase dechlorination agent and a preparation method and application thereof. The dechlorination agent includes a carrier and an active component, the active component includes CaO and CuO, the carrier is bentonite and alkali-modified fly ash, and the alkali-modified fly ash is fly ash modified by alkali solution. The preparation method of the present invention is prepared by mixing calcium hydroxide, copper oxide, bentonite and alkali-modified fly ash, adding a binder, extruding, drying, and roasting. The dechlorination agent obtained by using the preparation method can The dechlorination function can be realized under the condition of high dechlorination precision and breakthrough chlorine capacity.

The invention discloses a flame-retardant and wear-resistant corrugated box, which comprises a box body composed of corrugated cardboards. The cardboards are surface paper, corrugated paper and inner paper from the outside to the inside, and the three are bonded by oxidized starch, wherein the oxidized starch is added Vapor-phase corrosion inhibitor, and coating fire-resistant wear-resisting paint on surface paper and inner paper surface, this coating is prepared from following raw materials by weight: 30-40 parts of phenolic resin, nanometer Sb2O3-Al (OH) 310-15 parts, 10-20 parts of nano wear-resistant powder, 1-3 parts of reactive diluent, 0.5-2 parts of defoamer, 2-5 parts of penetrating agent, 0.5-1 part of antioxidant, 10-20 parts of organic solvent, 10 parts of curing agent ‑20 servings. In the present invention, the phenolic resin modified by cashew nut shell oil or melamine is applied to the surface of the carton, which has strong wear resistance and mechanical properties. Nano-aluminum hydroxide is used as a flame retardant to reduce the dosage and improve the flame retardancy.

The invention discloses environmental protection anti-corrosive antistatic coating, the environmental protection anti-corrosive antistatic coating is characterized in that the coating is composed of a first component and a second component, according to the weight parts, the first component accounts for 500 parts to 1500 parts, and the second component accounts for 150 parts to 500 parts; according to the weight percentage, the first component comprises resin accounting for 20 percent to 50 percent, conductive filler accounting for 10 percent to 40 percent and filler accounting for 15 percentto 35 percent; the surplus is the solvent; the second component is a solidifying system. The coating of the invention is the coating layer structure formed through a reaction, the coating layer structure is an interpenetrating network structure of high molecular polymer, and the interpenetrating network structure is a spatial and multidimensional structure, wherein, each crosslinking point of thestructure is a linkage of a polar group, simultaneously, each crosslinking point is dispersed between the interpenetrating network structure of high molecular polymer and applied with the nanometer filler and the anti-corrosive filler linked with the crosslinking point, to ensure that the firm system structure has high compactness and resistance to wear, and the coating has super resistance to penetration and corrosion resistance.

The invention belongs to the field of synthesis and application of functional nanomaterials, and in particular relates to a preparation method and optical application of a novel near-infrared mercury chalcogenide fluorescent quantum dot. The novel HgTe / ZnSe fluorescent nanocrystal synthesized by the invention has the following general formula: The glutathione-coordinated HgTe / ZnSe core-shell quantum dots of the present invention have stable near-infrared fluorescence emission and good biocompatibility, the fluorescence emission has stable optical properties, adjustable emission wavelength, high quantum yield and low toxicity It is suitable for the preparation of near-infrared optoelectronic devices and the fluorescence imaging of deep tissue in animals.

The invention discloses a preparation method of oil soluble titanium dioxide nanometer particles. According to the method, beta-cyclodextrin is taken as a primary reaction material and is synthesizedinto a macroinitiator through modification; multi-arm star block copolymer is formed through a technology of combination of ATRP and click chemistry; the oil soluble titanium dioxide nanometer particles with uniform sizes and excellent dispersity, based on a solution phase synthesis method and taking the multi-arm star block copolymer as a unimolecular micelle template, are formed. The surfaces ofthe TiO2 nanometer particles are modified, the TiO2 nanometer particles can be uniformly dispersed in an oily solvent, and the occurrence of aggregation effect can be avoided. The formed nanometer particles are stable in quality, the particle sizes are uniform and can be stabilized in nanoscale, and that performance of the TiO2 nanometer particles is realized can be effectively guaranteed.

The invention relates to a modified high belite cement and a method for improving the early strength of the high belite cement, aiming at solving the technical problem of low early strength of the existing high belite cement. The present invention is to add nano indium oxide to high belite cement according to the mass ratio of high belite cement:nano indium oxide=9~4999:1 and mix evenly, the added nano indium oxide can excite C 2 The activity of S in the early stage can accelerate the hydration rate, generate more gels, regulate the crystal form of hydration products, and improve the early strength of high belite cement. The invention not only effectively solves the problem of high energy consumption in the cement industry, but also provides a simple and easy method for improving the early strength of high belite cement, which has low production cost and is easy to popularize.

The invention belongs to the field of fine chemical engineering, and particularly relates to a high-valence silver antibacterial agent and a preparation method thereof. The high-valence silver antibacterial agent is a silver-polyhexamethylene biguanidine complex with the electric potential zeta larger than 0. A metal part of the silver-polyhexamethylene biguanidine complex is Ag3+, and the antibacterial property of the complex is 200 times that of Ag+. A biological acceptable part is polyhexamethylene biguanidine (PHMB), compared with other guanidines with small molecular weights, the antibacterial property is good, the advantages are more obvious because of the synergistic antibacterial effect of PHMB and other antibiotics, and toxicity to cells and tissue of human bodies is smaller. The nanoscale or micron-size Ag(III)-PHMB complex high in antibacterial activity is prepared by means of reversed-phase microemulsion or the aqueous solution environment. On one hand, the Ag(III)-PHMB complex can reduce toxicity, and on the other hand, the metal part and the biological acceptable part achieve the synergistic antibacterial effect so that the antibacterial property of the antibacterial agent can be effectively improved. The antibacterial agent has a great significance in treatment of human epidermis infection.

The invention discloses preparation and application of a core-shell structure Ti-Zr-Si composite photocatalyst with a strong absorption effect on incident light. Zirconium oxychloride octahydrate, tetraethoxysilane and titanium sulfate are used as initial raw materials to prepare titanium-silicon-zirconium sol, and the adding amount of the raw materials is that n (Ti): n (Zr): n (Si) = (2-6): 1: (1-4). Citric acid is used as a metal ion complexing agent, and the mass ratio of citric acid to zirconium oxychloride octahydrate is 0.5: 2. The titanium-silicon-zirconium sol is dried, and the titanium-silicon-zirconium sol is calcined at 800 DEG C to obtain white TiO2-ZrO2-SiO2 composite powder with good crystallinity. Another part of the same titanium-silicon-zirconium sol is prepared, and dipped and calcined to obtain white TiO2-ZrO2-SiO2 composite powder with good crystallinity and calced at 350-450 DEG C for 1-2 hours again to obtain the core-shell structure Ti-Zr-Si composite photocatalyst. The prepared composite photocatalyst has very good adsorption and photocatalysis properties, and the photocatalysis efficiency can be greatly improved. The core-shell structure Ti-Zr-Si compositephotocatalyst has the characteristics of simple process, short period, low energy consumption and low cost.

Preparation and application of a core-shell structure Ti-Zr-Si composite photocatalyst with strong absorption of incident light, using zirconium oxychloride octahydrate, ethyl orthosilicate, and titanium sulfate as starting materials to prepare titanium silicon Zirconium sol, wherein the amount of raw materials added is n(Ti):n(Zr):n(Si)=2~6:1:1~4. Using citric acid as the metal ion complexing agent, the mass ratio of citric acid to zirconium oxychloride octahydrate is 0.5:2. Titanium silicon zirconium sol was dried and calcined at 800°C to obtain white TiO with good crystallinity 2 -ZrO 2 ‑SiO2 2 Composite powder. After preparing another part of the same titanium-silicon-zirconium sol, impregnated and calcined, white TiO with good crystallinity was obtained. 2 -ZrO 2 ‑SiO2 2 The composite powder is calcined again at 350-450°C for 1-2 hours to obtain a Ti-Zr-Si composite photocatalyst with a core-shell structure. The prepared composite photocatalyst has good adsorption and photocatalytic properties at the same time, which can greatly improve the photocatalytic efficiency. The invention has the characteristics of simple process, short cycle, low energy consumption and low cost.