83results about "Sol preparation" patented technology

The present invention relates to a colloidal composition comprising unmodified, discrete cellulose microparticles, such as a colloidal emulsion or colloidal gel, a method of preparing the colloidal composition and uses of the colloidal composition and cellulose particles The colloidal composition comprises a continuous phase and a dispersed phase, wherein the continuous phase is a liquid; wherein the dispersed phase comprises cellulose microparticles which are dispersed in the continuous phase of the colloidal composition, wherein the cellulose microparticles have a mean average particle length of from 0.1 to 20 µm a mean average particle width from 0.05 to 1.3 µm, and a maximum thickness not exceeding 0.2 µm determined by scanning electron microscopy; and an aspect ratio of length / width of 1 to 25, and wherein the colloidal composition has a flow index n of ≤ 1 determined by a rheometer at NTP (normal temperature (25°C) and pressure (1 atm)).

Thermally expandable microspheres comprise a polymeric shell surrounding a hollow core, wherein the hollow core comprises a blowing agent, and the polymeric shell comprises isolated lignin.

The invention belongs to the technical field of solar cells, and particularly relates to a perovskite solar cell with cysteine-silver clusters implanted into a perovskite active layer in a targeted mode, a cysteine-silver cluster colloidal solution is prepared by adopting a liquid-phase pulse laser irradiation technology, the cysteine-silver clusters serve as an additive and are implanted into the perovskite solution, and the perovskite active layer is prepared. And sequentially spin-coating a hole transport layer, a perovskite layer and an electron transport layer, and finally evaporating a metal electrode to prepare the perovskite solar cell with the cysteine-silver cluster target implanted perovskite active layer. The cysteine-silver cluster is implanted into the perovskite solution, and the smaller critical dimension of the cysteine-silver cluster can be used as a nucleation site, so that the growth of perovskite crystals is regulated and controlled, the defects of the perovskite thin film are passivated, the residual stress of the thin film is released, the formation of gradient energy levels of the perovskite layer and the electron transport layer is promoted, and the extraction and transmission of electrons are improved; the perovskite solar cell with higher efficiency is obtained, the implantation mode is convenient, and the preparation process is simple.

The present invention relates to a method for synthesizing nanoparticles comprising or containing at least one zeolite nanocrystal, comprising: - preparing a first composition / solution 1 comprising an aluminum source and a source of alkali metal M, particularly Na ions; - preparing a second composition / solution 2 comprising a silicon source and a source of alkali metal M, particularly Na ions, wherein compositions / solutions 1 and 2 contain no organic structuring agents; - mixing the two compositions / solutions 1 and 2; - crystallizing the mixture; and - separating the nanoparticles thus formed. According to the present invention, both the first composition / solution 1 and the second composition / solution 2 comprise the sources and alkaline phosphate buffer (PBS). The present invention also relates to the obtained nanoparticles and compositions comprising them.

A modified metal oxide particle sol, when applied as a coating onto a substrate, is capable of having transparency, a high particle refractive index and good coat resistivity. The modified metal oxide particle sol is composed of modified metal oxide particles (iii) in which stannic oxide particles (i) having an average primary particle size of 4 to 50 nm serve as cores and are coated with metal oxide particles (ii) of at least one metal oxide selected from the group consisting of antimony oxide, stannic oxide and silicon oxide and having an average primary particle size of 1 to 10 nm, which modified metal oxide particles (iii) are dispersed in an organic solvent. The average primary particle size of the core particles (i) and the average primary particle size of the coating particles (ii) satisfy the relationshipsize of core particles(i)≥size of coating particles(ii),the ratio (total weight of metal oxides other than stannic oxide) / (weight of stannic oxide) is from 0.005 to 1.0, and the sol includes an amine (a) having a water solubility of 0.1 g / L or more and an amine (b) having a water solubility of less than 0.1 g / L.

The present disclosure relates to expanded microspheres comprising a polymeric shell surrounding a hollow core wherein the outer surface of the polymeric shell is free of particulate deposits derived from a solid suspending agent, and methods for making the expanded microspheres.

The invention discloses reaction equipment for preparing low-sodium aluminum sol, and relates to the technical field of chemical equipment, the reaction equipment comprises a reaction kettle, and the reaction kettle is internally provided with an inner cavity for aluminum sol preparation reaction. The invention further discloses a reaction method of the reaction equipment for preparing the low-sodium aluminum sol. The reaction method comprises the following steps of aluminum sol generation, aluminum sol transfer, product discharge and back flushing. The reaction kettle, the fixed cover and the annular cover are arranged, metal aluminum and hydrochloric acid react in the reaction kettle to generate a colloidal solution of aluminum sol, the colloidal solution of the aluminum sol is in a nano-particle state after generation, and the colloidal solution of the aluminum sol is directly transferred into the annular cover at the moment; the aluminum sol colloidal solution in the nano-particle state passes through the ion exchange column in the annular cover, sodium ions in the aluminum sol colloidal solution are adsorbed and separated by the strong-acid cation exchange resin in the ion exchange column, and therefore the low-sodium aluminum sol can be obtained.

To provide a two-dimensional colloidal crystal structure having few defects in the crystal structure. A titania-containing layer 2 is formed on a substrate 1, and a two-dimensional colloidal crystal layer 4 is further formed thereon. This structure is produced by 1) forming the metal oxide layer 2 on the surface of the substrate 1 as the substrate preparation step (S1), 2) preparing a dispersion 6 of charged three-dimensional colloidal crystals 5 having a surface charge of an opposite sign to the surface charge of the metal oxide layer 2 as the colloidal crystal dispersion preparation step (S2), and 3) bringing the dispersion 6 of the charged three-dimensional colloidal crystals 5 into contact with the metal oxide layer 2 as the two-dimensional colloidal crystal formation step (S3).

To provide alternative thermoplastic expandable microspheres whose thermoplastic polymeric shell is at least partially derived from a sustainable source, a method for preparing the microspheres, and use of the microspheres.SOLUTION: There are provided thermally expandable microspheres comprising a polymeric shell surrounding a hollow core, wherein the hollow core comprises a blowing agent, and the polymeric shell comprises isolated lignin. The isolated lignin preferably comprises Kraft lignin such as acetylated Kraft lignin. A method for preparing thermally expandable microspheres comprising a polymeric shell surrounding a hollow core comprises the steps of (i) preparing a mixture comprising the isolated lignin and the blowing agent in a solvent, and (ii) spray-drying the mixture obtained in step (i) to obtain thermally expandable microspheres.SELECTED DRAWING: Figure 1

Disclosed in the present invention is a preparation method for a hydrosol solution. The preparation method comprises the following steps: classifying, according to material characters, all materials required for hydrosol solution preparation, and, according to the material characters, separately allocating the classified materials into feeding stations of a hydrosol solution preparation system for later use; turning on a heating system of the hydrosol solution preparation system to pre-heat a processing pipeline of a mixing and shearing apparatus, such that the temperature in the processing pipeline meets a hydrosol solution processing requirement; calculating and configuring a flow velocity for the materials of each material character to enter the processing pipeline; and starting the mixing and shearing apparatus of the hydrosol solution preparation system, and synchronously opening each feeding station, each type of materials being conveyed into the processing pipeline according to the configured flow velocity, and a first screw in the processing pipeline mixing and shearing all the materials at the same time, so as to obtain a uniform hydrosol solution. The present invention can reduce the working intensity of operators, and involves a simple preparation process and achieves high continuity, reducing the time consumed by the whole process.

The present invention relates to a method for synthesizing nanoparticles comprising or containing at least one zeolite nanocrystal, comprising: - preparing a first composition / solution 1 comprising an aluminum source and a source of alkali metal M, particularly K ions; - preparing a second composition / solution 2 comprising a silicon source and a source of alkali metal M, particularly K ions, wherein compositions / solutions 1 and 2 contain no organic structuring agents; - mixing the two compositions / solutions 1 and 2 together; - crystallizing the mixture; and - separating the nanoparticles thus formed. According to the present invention, both the first composition / solution 1 and the second composition / solution 2 consist of the sources and phosphate-buffered saline. The present invention also relates to a colloidal suspension of the obtained nanoparticles and a pharmaceutical composition containing the nanoparticles.

The invention relates to a biochar-loaded nano zero-valent iron repair material as well as a preparation method and application thereof. The biochar loaded nano zero-valent iron repair material is prepared from a persulfate-biochar carrier and metal sulfide modified composite acid stabilized nano zero-valent iron sol, the composite acid is composed of gallic acid and humic acid / fulvic acid; the preparation method comprises the following steps: S1, preparing a persulfate-biochar carrier; and S2, preparing the biochar loaded nano zero-valent iron repair material. The method is applied to groundwater chlorohydrocarbon pollution remediation. According to the method, in the reductive dechlorination process of the nano zero-valent reduced iron, released Fe < 2 + > can strengthen persulfate, Fe < 2 + > is regenerated by utilizing the reduction effect of gallic acid on reacted Fe < 3 + >, and catalytic circulation of iron is maintained; humic acid / fulvic acid is used for efficiently driving the degradation process; and metal sulfide is utilized to catalyze reduction of organic chlorine chemicals, so that the reductive dechlorination performance of the nano-iron material is improved, and the repairing effect of chlorinated hydrocarbon is optimized.

Provided are a pure inorganic stimuli-responsive sol, a preparation method therefor, and a use thereof. The sol comprises an inorganic one-dimensional nanomaterial and a solution for dispersing the inorganic one-dimensional nanomaterial. The inorganic one-dimensional nanomaterial at least comprises a rare earth metal element, and the positive charge of the rare earth metal element causes the inorganic one-dimensional nanomaterials to repel each other to form the sol. The preparation method comprises: step (1). adding an inducer to a metal salt solution while stirring to form a uniform liquid; step (2). adding a liquid to a reaction kettle for reaction; and step (3). controlling the environmental hydroxyl concentration to obtain a sol product. Further provided is a method for the stimuli-responsive conversion of a pure inorganic stimuli-responsive sol into a gel, a method for the conversion of a pure inorganic stimuli-responsive gel into a pure inorganic stimuli-responsive sol, and a use thereof in sterilization, hemostasis, wound recovery, drug carriers, medical auxiliary materials, cosmetic materials, or sunscreen products. The method has low cost, can achieve the adjustment of the interaction between one-dimensional inorganic nanomaterials without the need to replace ligands, and has extremely high advantages in stimuli-responsive sol-gel conversion capacity.

The invention concerns a composite structured nanomaterial comprising discrete, interconnected nanoparticles separated by and bound within a matrix material. These unique materials display optical properties that may be varied or tuned by altering their structural features. Also disclosed are simple, environmentally friendly methods to produce such structured nanomaterials, which do not require the use of harsh reducing agents or chemicals and so provide a green production route to un-contaminated and pure nanomaterials.

[Problem] To make it possible to disperse organic-modified nanoparticles even into solvents having a relatively large molecular weight and to increase the degree of freedom in solvent selection. [Solution] The present invention is a method for dispersing organic-modified nanoparticles into a solvent, and includes a dispersion step of dispersing organic-modified nanoparticles having organic modifying groups on the surface into a solvent. The solvent contains a poorly dispersible solvent that is poorly dispersible with respect to the organic-modified nanoparticles and a predetermined molecule. With respect to van der Waals volume, under the temperature and pressure in the dispersion treatment step the van der Waals volume of the predetermined molecule is smaller than that of the solvent and smaller than that of the organic modifying groups, and with respect to the dispersion term δD of the Hansen solubility parameters the absolute value of the difference between the value at the pressure of the organic-modified nanoparticles and the value of the predetermined molecule is 1.2 MPa1 / 2 or less, and the absolute value of the difference between the value at the pressure of the organic-modified nanoparticles and the value of the poorly dispersible mixed solvent containing the predetermined molecule is 1.2 MPa1 / 2 or less.

The present invention relates to colloidal silicon dioxide containing silicon dioxide particles with a small average secondary particle size and dispersion stability that can be maintained for extended periods even under strongly acidic conditions at a pH of 3 or less, and to a method for its preparation. The present invention relates to colloidal silicon dioxide comprising silicon dioxide particles, wherein the silicon dioxide particles have an average secondary particle size of 20 nm or less, as measured by dynamic light scattering, and a zeta potential of -20 mV or less, as measured at a pH of 3, and are surface-modified with a sulfonic acid group.

A method for preparing aluminum hydroxide dry powder and its sol, and its application, relates to the field of vaccine adjuvant preparation. The method includes: preparing an ammonia solution or sodium hydroxide solution; preparing an aluminum chloride solution; neutralizing the ammonia solution or sodium hydroxide solution with the aluminum chloride solution at 15-20°C to generate a milky white, translucent colloidal suspension; filtering; freeze-drying followed by aging to obtain aluminum hydroxide dry powder; adding the dry powder to a sodium chloride electrolyte solution, processing it in a high-speed shear disperser, redispersing the dry powder into a sol at a certain temperature, and homogenizing it cyclically in a high-pressure homogenizer to obtain aluminum hydroxide sol; removing electrolytes from the aluminum hydroxide sol using electrodialysis, followed by high-pressure sterilization and packaging. This invention solves the problems of clumping and sedimentation during sterilization and storage, poor stability, inconvenience in transportation and use, and limited concentration in existing aluminum hydroxide adjuvant preparation methods.

Methods for preparing highly stable concentrated dispersions of silver nanoparticles and described herein. Contemplated methods comprise combining a selected polysaccharidic dispersant with a selected non-reacting dispersant to yield concentrated silver dispersions with enhanced stability and lowered undesirable residual organics. Contemplated methods further comprise selecting an appropriate source of silver ions to reduce the ionic strength of the reaction medium and final silver dispersions.

The present invention relates to Janus-type spherical cellulose nanoparticles and a method for preparing the same. The Janus-type spherical cellulose nanoparticles of the present invention are chemically modified on only one side to produce particles with a hydrophilic face and an opposite lipophilic face. Such particles exhibit excellent surfactant properties and can be used to prepare Pickering emulsions.

A method for producing a quantum dot including crystalline nanoparticle fluorescent material, wherein, using a first precursor solution and a second precursor solution containing different elements each other, the second precursor solution is sprayed as an aerosol on the heated first precursor solution, or both the first precursor solution and the second precursor solution are sprayed on a heated solvent as aerosols, and the first precursor solution and the second precursor solution are reacted with each other to synthesize a core particle containing the different elements. The method for producing quantum dots, can suppress the non-uniformity of the particle size of the quantum dots and accompany increase in the distribution of emission wavelengths in large scale synthesis.

The invention provides a preparation method of special aluminum sol, and belongs to the technical field of aluminum products. The preparation method comprises the following steps: S1, mixing an aluminum source, a first acid regulating agent, a first structure-directing agent, a first valence dopant and water, and carrying out first reaction at a first temperature and a first pH value to obtain a pre-nucleation reaction solution; s2, adding a neutralizing agent, increasing the pH value to a second pH value, adding a second acid regulating agent and a second structure-directing agent into the system when the pH value reaches a preset trigger point, and then carrying out a second reaction at a second temperature and at the second pH value; s3, adding a second valence dopant into the system subjected to the second reaction, adjusting the pH value to a third pH value, and then aging; and S4, carrying out ultrasonic treatment to obtain the aluminum sol. The aluminum sol prepared by the invention can still keep good structural stability in a high-temperature environment, and shows unique application advantages in the fields of catalyst carriers, ceramic materials, coating additives and the like.

This disclosure relates to a glucose-sensing electrode including a nanoporous metal layer and a maltose-blocking layer formed over the nanoporous metal layer. The nanoporous metal layer is capable of oxidizing both glucose and maltose without an enzyme specific to glucose or maltose in the glucose-sensing electrode. The maltose-blocking layer has porosity that permits glucose to pass therethrough and inhibits maltose from passing therethrough toward the nanoporous metal layer.

The invention relates to the technical field of wastewater treatment, in particular to a method for enhancing degradation of pollutants in nitrobenzene and phenol wastewater through electrocatalysis, which comprises the following steps: S1, coupling an electrochemical system with a two-phase anaerobic reactor, and S2, degrading the pollutants. According to the method, a treatment method combining electrochemistry and biotechnology is adopted, an electrode is used as an electron acceptor or donor, the metabolic process of microorganisms is directionally enhanced, degradation inhibition of two pollutants is synchronously broken, the electron transfer efficiency is enhanced, and finally efficient recovery of methane is realized; cooperative treatment and resource utilization of various pollutants can be stably and efficiently achieved, meanwhile, the treatment cost and the environmental risk are reduced, and the method is an efficient, economical and environment-friendly treatment method for the nitrobenzene-containing wastewater and the phenol-containing wastewater.

The invention relates to a method for synthesizing nanoparticles consisting of or comprising at least one zeolite nanocrystal, comprising:-preparing a first composition / solution 1 comprising a source of aluminum and a source of ions of an alkali metal M, in particular a source of ions of K; preparing a second composition / solution 2 containing a source of silicon and a source of ions of an alkali metal M, in particular of K, said compositions / solutions 1 and 2 being free of any organic structure directing agent; -mixing the composition / solutions 1 and 2 and standing under stirring; crystallizing the mixture at a temperature greater than or equal to 50 DEG C; and-optionally separating said nanoparticles formed. According to the invention, both the first composition / solution 1 and the second composition / solution 2 consist of said source and an aqueous buffer. The invention also relates to colloidal suspensions of the resulting nanoparticles, and to pharmaceutical compositions comprising said nanoparticles.

To provide a method for preparing expanded microspheres, expanded microspheres, and uses of expanded microspheres without the need to use a solid suspending agent.SOLUTION: A method for preparing expanded microspheres comprising a) obtaining a composition comprising a polymer dissolved in a solvent, wherein the polymer has a glass transition temperature (Tg, °C), and b) spray-drying the composition of step a) in a spray dryer, the spray dryer comprising an inlet drying gas having an inlet temperature (Tinlet, °C), wherein a minimum inlet temperature of the drying gas (Tinlet,min, °C) is Tinlet,min=Tg*0.75, wherein a maximum inlet temperature of the drying gas (Tinlet,max, °C) is Tinlet,max=Tg*2.2, and wherein Tinlet,max≥Tinlet≥Tinlet,min.SELECTED DRAWING: None

The present application relates to wastewater treatment technical field, specifically to a kind of electrocatalysis enhanced method for degrading pollutants in nitrobenzene and phenol wastewater, comprising the following steps: S1, electrochemical system coupling two-phase anaerobic reactor, S2, pollutant degradation;The present application is a kind of processing method by combining electrochemistry and biotechnology, uses electrode as electron acceptor or donor, directional reinforcement microbial metabolic process, synchronous cracking two types of pollutants degradation inhibition, strengthen electron transfer efficiency and finally realize the efficient recovery of methane, can stably and efficiently realize the synergistic treatment and resource utilization of multiple pollutants, while reducing processing cost and environmental risk, it is a kind of efficient, economic, environmental protection nitrobenzene-containing wastewater and phenol-containing wastewater processing method.

A foamed colloidal silica binder having a total porosity of about 50% to about 95% by volume includes a synthetic, non-protein foaming agent mixed with colloidal silica and water. The foamed colloidal silica binder has sufficient durability and integrity to withstand the mixing with dry refractory ingredients to form a porous refractory composition, casting the refractory composition into a refractory shape, and drying the shape to form a porous refractory article having a porosity of about 25% to about 75% by volume. The resulting refractory articles have excellent high-temperature durability and insulating properties. A method of making the foamed colloidal silica binder is also provided.

This disclosure relates to an apparatus for glucose-sensing that address interference of ascorbic acid and acetaminophen. The apparatus includes a first electrode capable of oxidizing glucose and at least one of ascorbic acid and acetaminophen. The apparatus further includes a second electrode capable of oxidizing at least one of ascorbic acid and acetaminophen but not capable of oxidizing glucose. The first electrode includes a deposit of irregularly shaped bodies that are formed of numerous nanoparticles having a generally oval or spherical shape with a length ranging between about 2 nm and about 5 nm.

This disclosure relates to an apparatus for glucose-sensing that address interference of ascorbic acid and acetaminophen. The apparatus includes a first electrode capable of oxidizing glucose and at least one of ascorbic acid and acetaminophen. The apparatus further includes a second electrode capable of oxidizing at least one of ascorbic acid and acetaminophen but not capable of oxidizing glucose. The first electrode includes a deposit of irregularly shaped bodies that are formed of numerous nanoparticles having a generally oval or spherical shape with a length ranging between about 2 nm and about 5 nm.

comprising: providing a solid substrate; depositing a combination of vaporizable gold atoms and one or more organosulfur ligands on the surface of said substrate by physical vapour deposition (PVD) un