2523 results about "Ethylenediamines" patented technology

The invention discloses high-quantum-yield fluorescence carbon quantum dots and a preparation method thereof. The method comprises the following steps: by using chitosan as a carbon source, adding glacial acetic acid and ethylenediamine, and sufficiently stirring to obtain a paste; reacting in a microwave oven to finally obtain a black solid; taking out, naturally cooling, adding a certain amount of secondary water, dissolving by stirring to obtain a brown solution, removing the insoluble substance to obtain a brown solution, dialyzing to remove impurities to obtain a fluorescence carbon quantum dot water solution, and carrying out freeze-drying to obtain the fluorescence carbon quantum dots. The method has the advantages of simple technique, wide raw material sources, low price, low requirements for preparation conditions and higher quantum yield of the obtained carbon quantum dots. The obtained fluorescence carbon quantum dots can be used for detecting Fe<3+> in a water body, and can also be used in living cell fluorescence imaging.

The invention relates to a method for preparing ethylenediamine modified chitosan composite magnetic microspheres and application thereof. The method specifically comprises the following steps of: mixing acidic aqueous solution of chitosan and a water-based magnetofluid first, then crosslinking by using glutaraldehyde, then adjusting the pH value to form a gelatinous precipitate, then modifying by using ethylenediamine and epichlorohydrin, and washing and drying to obtain a final product. The product has good absorption effect on radionuclide aranium and metal ions such as heavy metal Pb, Cr and the like; the removal rate reaches over 95 percent when the initial concentration of various ions is within the range of 200mg / L; and the product has quick absorption rate and good regeneration performance. The ethylenediamine modified chitosan composite magnetic microspheres can be used for metal recovery and pollution remediation in mines, radioactive waste water, smelteries, electronics factories and waste water of electroplating factories.

A first variant of an adhesive composition for making a lignocellulosic composite includes soy protein and / or lignin; at least one substantially formaldehyde-free curing agent that includes at least one amine, amide, imine, imide, or nitrogen-containing heterocyclic functional group that can react with at least one functional group of the soy protein; and at least one compound selected from a boron compound, a group IA oxide or hydroxide, or a group IIA oxide or hydroxide. A second variant of an adhesive composition includes a first component selected from soy protein and / or lignin; and at least one substantially formaldehyde-free curing agent selected from a reaction product of epichlorohydrin with ethylenediamine, a reaction product of epichlorohydrin with bis-hexamethylenetriamine, or a reaction product of epichlorohydrin with hexamethylenediamine.

The invention discloses graphene aerogel and a preparation method thereof. The method comprises the following steps: (1) uniformly mixing graphene oxide dispersion liquid with an amine water-soluble compound to obtain graphene oxide mixed liquid, wherein the amine water-soluble compound is selected from one or more of diethylamine, ethidene diamine, propane diamine, butane diamine, diethylene triamine, triethylene tetramine, tetraethylene pentamine, allylamine polymer and N,N'-bis(2-aminoethyl)-1,3-propane diamine; (2) irradiating the graphene oxide mixed liquid by high-energy rays under the anaerobic condition to obtain amino-modified graphene aerogel; (3) performing freeze-drying or supercritical CO2 drying to obtain the graphene aerogel. The graphene aerogel adopts a porous and macroporous structure, is relatively uniform in structure, and can be used for adsorbing an organic solvent; moreover, the preparation method is simple and environment-friendly.

The invention relates to a colored aluminum pigment with high color depth and a preparation method thereof. The colored aluminum pigment is obtained by depositing a layer of silicon dioxide on a flaky metallic aluminum sheet substrate and then depositing one or more layers of metal oxide on the surface of the silicon dioxide, and the colored aluminum pigment exists in the form of dry powder. The preparation method comprises the following steps: a. stirring to disperse commercially available aluminum pigment slurry in alcohol, alcohol ether or a ketone solvent; b. regulating the temperature to 30-80 DEG C, respectively adding tetraethoxysilane and aqueous solution to the dispersed aluminum pigment slurry with the mol ratio of the tetraethylorthosilicate to the water ranging from 1:0.5 to 1:20, adding a catalyst such as ethylenediamine solution or aqueous ammonia, and obtaining aqueous aluminum pigment slurry by vacuum filtration and washing after the reaction; and c. cladding the aqueous aluminum pigment slurry obtained in the step b with the hydrated metal oxide on the powdered aluminum surface in a liquid phase. The preparation method help prepare the colored aluminum pigment with diversified colors and high color depth without reducing brightness of the original aluminum pigment slurry.

The invention provides hollow fluorescent carbon quantum dots as well as a preparation method and application thereof and belongs to the technical field of light-emitting nano materials. The preparation method comprises the following steps: adding ethanediamine and concentrated acid into water soluble saccharides serving as a carbon source, so as to obtain a puce viscous material; after reaction stops, naturally cooling a glass container, adding a certain amount of secondary water, stirring for dissolving to obtain a dark brown solution, and dialyzing to remove impurities, thereby obtaining a hollow carbon quantum dot aqueous solution; and freeze-drying to obtain the hollow carbon quantum dots. The preparation method is simple in process, wide in raw material source, low in price, low in preparation condition requirement, and free from energy consumption; the obtained hollow carbon quantum dots are relatively high in yield, small in particle diameter and uniform in size; the preparation method is capable of realizing batch production; the obtained hollow carbon quantum dots can be used for anticancer drug carriers, are capable of reducing the toxic and side effects of anticancer drugs and also can be used in detection of VI ions in water.

A polishing composition which achieves surfaces with high planarity and the reduction of corrosions in the wiring metal surface at the same time is provided.Such compositions include(A) an oxidizing agent;(B) at least one acid selected from an amino acid, a carboxylic acid of no more than 8 carbon atoms, and an inorganic acid;(C) a sulfonic acid having a concentration of 0.01% by mass or more and having an alkyl group of 8 or more carbon atoms;(D) a fatty acid having a concentration of 0.001% by mass or more and having an alkyl group of 8 or more carbon atoms; and(E) at least one compound selected from a pyridine carbonyl compound, a nonionic water-soluble polymer, 2-pyrrolidone, N-methylpyrrolidone, 1,3-dimethyl-2-imidazolidinone, gramine, adenine, N,N′-diisopropylethylenediamine, N,N′-bis(2-hydroxyethyl)ethylenediamine, N,N′-dibenzylethylenediamine, and N,N′-diphenylethylenediamine.

The invention discloses a super-hydrophobic reduced graphene oxide / sponge composite material and a preparation method thereof. The method includes: employing a microwave-ultrasonic wave method and using ethylenediamine as the reducing agent to reduce graphene oxide into reduced graphene oxide, and under the action of hole and other sound waves, dispersing and attaching the reduced graphene oxide to a commodity sponge, thus obtaining the super-hydrophobic reduced graphene oxide / sponge composite material. The method provided by the invention has the characteristics of simple operation, low cost, short reaction time, high efficiency and low energy consumption, and is beneficial to industrial mass production. The reduced graphene oxide / sponge composite material prepared by the method provided by the invention has excellent hydrophobic and oil absorption properties, large adsorption capacity and good stability, and can be used as a selective adsorbent for oily wastewater treatment.

Methods and devices are provided for the detection of bacterial agents such agents as Bacillus anthracis and Clostridium botulinum with high sensitivity and selectivity. More specifically, methods and devices are based on a phosphorescence-emission detection system using chelate-stabilized lanthanides (e.g, Eu(III), Tb(III), and Sm(III)) to detect various spore-specific small organic molecules (e.g., dipicolinic acid, diaminopimelic acid, n-acetlymuramic acid, and the like). By careful selection of the chelating agent or ligand coordinated to the lanthanide, both high specificity and selectivity can be obtained. Examples of suitable and preferred sensor systems include N-(2-hydroxyethyl)ethylenediaminetriacetic acid (HEDTA) and N-(2-hydroxyethyl)iminodiacetic acid (HEIDA) combined with europium (III) and / or terbium (III). The chelate-stabilized lanthanides react with the spore-specific “target” molecules to form a characteristically phosphorescent product which can then be detected.

The invention discloses a phenyl bistriazole compound, and a preparation method and application thereof, and particularly relates to a 1-[4-(1H-1,2,4-triazole-1-yl)phenyl]-1H-1,2,4-triazole single crystal and a preparation method of 1-[4-(1H-1,2,4-triazole-1-yl)phenyl]-1H-1,2,4-triazole. The organic compound is prepared by heating ethylenediamine, 1H-1,2,4-triazole, potassium carbonate, 1,4-diiodobenzene and cuprous iodide through a one-pot method. The preparation method disclosed by the invention has the characteristics simple process operation, low production cost and less environmental pollution, and is suitable for large-scale industrial production. The 1-[4-(1H-1,2,4-triazole-1-yl)phenyl]-1H-1,2,4-triazole single crystal prepared by the invention can be used in the aspect of photoelectric materials, especially dye and luminescent agents.

The invention discloses an adsorbent used for efficiently separating formaldehyde from air and a preparation method thereof. An adsorbent carrier is active carbon, the surface of which is attached with one or more of -NH, -NH2 and -NH3. The precursor of -NH, -NH2 and -NH3 is one of salvolatile, ammonium bicarbonate, ammonium sulfate, ammonium nitrate, ammonium chloride, ethene diamine, hexamethylenediamine, aniline and urea. The adsorbent can absorb and separate formaldehyde in air when space velocity is 20000-80000h<-1> at room temperature. Especially when the formaldehyde and benzene seriesin the air coexist, the adsorbent not only can absorb and separate formaldehyde but also can absorb and separate the benzene series. Therefore, the adsorbent can be widely applied to the purifying treatment of air in hermetic and semi-hermetic limited spaces, such as building interiors, spacecrafts, submarines, undergrounds and the like.

The invention discloses acrylate grafted aqueous polyurethane emulsion and a preparation method thereof. The emulsion is characterized is prepared from polyether polyol, dimethylol propionic acid, isophorone diisocyanate, ethylenediamine, hydroxyethyl acrylate and the like. The preparation method comprises the following steps: carrying out prepolymerization on polyether polyol, dimethylol propionic acid and isophorone diisocyanate so as to introduce a hydrophilic monomer; adding ethylenediamine and hydroxyethyl acrylate to carry out chain extension so as to introduce a functional monomer; adding an acrylate mixed monomer so as to reduce system viscosity; adding triethylamine for neutralization; adding deionized water for emulsification and dispersion under the condition of high-speed shearing to obtain emulsion; then dropwise adding the acrylate mixed monomer and an initiator, raising the temperature and carrying out reaction; and cooling to obtain the PUA (polyurethane-acrylate) emulsion. The emulsion prepared by the method has small grain size and excellent performances such as mechanical performance, is narrowly distributed and can be widely applied to industry fields such as leather finish, coatings, adhesives and fabric coatings.

The invention discloses an amination catalyst and a preparation method thereof, which aims to solve the problem that the amination catalyst is not high in activity and selectivity. The compositions in weight percentage of the amination catalyst are: 15 to 25 percent of A, 5 to 10 percent of B, 1 to 3 percent of C, 0.1 to 1.5 percent of D, and the balance being h-type mordenite, wherein the A is alumina; the B is titanium oxide; the C is metallic ion W<6+>, Re<7+> or Bi<3+>; the D is metallic ion Cs<+>; and the metals exist in the form of elements or oxides. The preparation method comprises the following steps of loading the components C and D on the h-type mordenite, well mixing the components C and D with the alumina and ethanolamine titanate dodecane alcohol ester, molding, roasting and activating the mixture. The catalyst is used for synthesizing ethylene dimine under the conditions of ethanolamine and ammonia phase.

A high-stability nalmefene hydrochloride injection is prepared from nalmefene hydrochloride (0.005-0.2 W / v %) and the medicinal carrier chosen from sodium chloride, glucose, beta-cyclodextrin, dextran, pectose, sorbitol, etc. Its preparing process is also disclosed.

The invention relates to an ester type fire-resistant hydraulic fluid. The hydraulic fluid comprises the following raw materials by weight percent: 95-99% of base oil, 1.0-5.0% of diphenol propane, 0.005% of dimethylsilicone fluid or dimethylsilicone grease, 0.05% of tricresyl phosphate, 0.1% of benzotriazole, 100 parts per million (PPM) demulsifying agent T1001 or LZ5957 and 0.2-0.3% of triazole derivative, thiadiazole derivative, N-salicylidene ethylamine, N, N'-bis(salicylidene)ethylenediamine, N, N'-bis(salicylidene)propylene diamine or ethylenediamine tetraacetic acid. A preparation method of the ester type fire-resistant hydraulic fluid comprises the following steps of sufficiently and evenly stirring various materials at room temperature according to a formula, and then filtering. The ester type fire-resistant hydraulic fluid has the beneficial effects that the high temperature use performance of the product is greatly improved, the service life of a hydraulic system and the oil changing period of oils are prolonged, and the ester type fire-resistant hydraulic fluid has a good flame-retardant effect and is safe to use. The preparation method has the advantages that operation is convenient, technology and equipment are simple, energy consumption is low, cost is low, and the like.

The invention relates a compound represented by the formula (1):Q1-Q2-C(═O)—N(R1)-Q3-N(R2)-T1-Q4  (1)wherein R1 and R2 represent H or the like; Q1 represents an aromatic ring, heterocyclic ring or the like; Q2 represents a single bond, aromatic ring, heterocyclic ring or the like; Q3 represents a group or the like, Q4 represents an aromatic ring, heterocyclic ring or the like; and T1 represents —CO— or —SO2—, and a medicine which comprises the compound and is useful for thrombosis and embolism.

The invention discloses N-CQDs (nitrogen-doped carbon quantum dots) with high fluorescence quantum yield and a preparation method of the N-CQDs. Alanine is taken as a carbon source, ethanediamine is taken as a surface passivator, and the N-doped carbon quantum dots with high fluorescence quantum yield is successfully prepared with a simple one-step hydrothermal method. Compared with carbon quantum dots synthesized with other protein or amino acid as a carbon source, the nitrogen content of the prepared N-CQDs can reach 61.1%, the average fluorescence lifetime is 4.43 ns, the highest fluorescence quantum yield can reach 46.2% and approaches the fluorescence quantum yield of the carbon quantum dots prepared with a laser ablation method and an electric arc method, and the N-doped carbon quantum dots have low cytotoxicity and excellent biocompatibility and has wide application value in biosensing and bioimaging. The invention further discloses a high quenching effect of NADH (nicotinamide adenine dinucleotide) on fluorescence of the N-CQDs. On the basis that NADH has high quenching effect on fluorescence of the N-CQDs, high-sensitivity fluorescence biosensing for detecting NADH is established, the linear detection range is as low as 80 mu M, and the limit of detection is 25.1 nM.

The invention relates to the technical field of electro-analytical chemistry and protein identification transducers, and discloses a synthesizing method of functionalized ionic liquid and a preparation method and application of a molecular imprinting electrochemical transducer composed of the functionalized ionic liquid, carboxylation multiwalled carbon nanotubes and glassy carbon electrodes. The preparation method of the molecular imprinting electrochemical transducer comprises the steps that the polymerizable amino-functionalized ionic liquid is used as a functional monomer, BSA is used as template protein, N, N'-methylene bisacrylamide is used as a cross-linking agent, an oxidation-reduction system composed of ammonium persulfate and TEMED is used as an initiator, after polymerization, a molecularly imprinted polymer film is formed on the surfaces of the glassy carbon electrodes decorating the carboxylation multiwalled carbon nanotubes, and then the template protein is eluted to obtain the molecular imprinting electrochemical transducer which can identify template protein in a specific mode. The molecular imprinting electrochemical transducer has the advantages of being simple in preparation, low in material cost, high in selectivity, good in biocompatibility, and capable of being used for identifying and detecting protein in aqueous solution.

Disclosed is a polishing composition which realizes both high planarity and reduction of corrosion in the surface of a wiring metal. Specifically disclosed is a polishing composition containing an oxidizing agent (A), at least one or more acids (B) selected from amino acids, carboxylic acids having 8 or less carbon atoms and inorganic acids, a sulfonic acid (C) having a concentration of not less than 0.01% by mass and an alkyl group having 8 or more carbon atoms, a fatty acid (D) having a concentration of not less than 0.001% by mass and an alkyl group having 8 or more carbon atoms, and at least one or more compounds (E) selected from pyridinecarbonyl compounds, nonionic water-soluble polymers, 2-pyrrolidone, N-methylpyrrolidone, 1,3-dimethyl-2-imidazolidinone, gramine, adenine, N,N'-diisopropylethylenediamine, N,N'-bis(2-hydroxyethyl)ethylenediamine, N,N'-dibenzylethylenediamine and N,N'-diphenylethylenediamine.

The invention discloses a preparation method of a graphene / polyacrylic ester-silicon-containing hyperbranched waterborne polyurethane multi-element composite emulsion. The method comprises the following steps: preparing graphene oxide (GO) by an improved Hummers method, modifying the GO by ethanediamine, enabling reaction with butyl acrylate to introduce double bonds to obtain MGO (ethylenediamined graphene oxide), and performing solution polymerization on the MGO and an acrylic ester monomer in DMF to prepare an MGO / PA solution; and grafting a partial double-bond end-sealed hydroxyl silicone oil modified linear polyurethane prepolymer, which is prepared by in-situ polymerization, on the periphery of a polyhydroxyl hydrophilic hyperbranched polyurethane core by diisocyanate, an oligomer dihydric alcohol and a chain extender and by a hyperbranched polymer chain extending method, mixing with the MGO / PA, and performing polycondensation and crosslinkage to obtain aminated graphene oxide / polyacrylic ester-silicon-containing hyperbranched polyurethane quaternary composite emulsion.

The invention relates to the technical field of textile printing and dyeing and provides a low-temperature soaping agent. The low-temperature soaping agent can soap surface dyeing of a dyed object at a lower temperature (60 DEG C), is not easy to foam, can chelate metal ions, has stronger combined dyeing capability and effectively prevents from staining. Meanwhile, the invention further provides a method for preparing the low-temperature soaping agent and an application of the low-temperature soaping agent. The low-temperature soaping agent is prepared from the following components in percentage by weight: 50-75% of maleic-acrylic copolymer, 5-15% of a surfactant, 0.1-0.5% of a de-foaming agent, 1-5% of ethanediamine di-o-hydroxyphenyl sodium acetate and the balance of de-ionized water.

The invention relates to 1-(1,2-epoxypropyl)-N-nitroimidazoline-2-amine which has a structural formula as shown in the picture. A preparation method of the compound comprises the steps of adding ethylenediamine to a reaction container, dropwise adding epoxy chloropropane in the reaction container while stirring, reacting for 2-3h, cooling, and vaporizing out acetonitrile to obtain epoxypropyl ethylenediamine; taking and dissolving nitroguanidine and the epoxypropyl ethylenediamine into water, dropwise adding hydrochloric acid solution while stirring, reacting for 2-3h, cooling, extracting, desolventizing to obtain crude product, and recrystallizating to obtain the product; or adding N-nitroimidazoline, potassium carbonate and organic solvent to the reaction container, heating to 75-81.6 DEG C, dropwise adding epoxy chloropropane in the reaction container after dissolving the N-nitroimidazoline, continuously heating until completing the reaction after dropwise adding, cooling reaction products, filtering, vaporizing filtrate to dry, adding water to residues, extracting by using methylene dichloride, desolventizing to obtain phase product, and recrystallizating by using butanone to obtain the product.

The invention belongs to a non-metallic polymer carbon point with room temperature phosphorescent performance as well as a preparation method and application thereof to preparation of a polymer pointfilm material and anti-counterfeiting, and belongs to the technical field of luminous carbon nanometer material preparation. According to the method, polyacrylic acid or polyvinyl alcohol is weighed and is dissolved into deionized water; ethylenediamine, neovaricaine, propane diamine or butanediamine are weighed and are added into the polyacrylic acid solution; sufficient mixing and uniform stirring are performed; the obtained mixed solution is subjected to hydrothermal reaction for 2 to 10 hours under the condition of 150 to 250 DEG C; then, natural cooling is performed to room temperature; next, the water solution is subjected to dialysis, concentration, impurity and excessive raw material removal; finally, vacuum freeze drying is performed to prepare the polymer carbon point solid powder with the room temperature phosphorescent performance. The method provided by the invention effectively solves the problems of complicated synthesis, limited types, high price, high toxicity and thelike of the existing room temperature phosphorescent material, and can be used for simply and conveniently preparing the polymer carbon point with different room temperature phosphorescent characteristics in batches.

The invention relates to a polyurethane retanning filler. The preparation method of the polyurethane retanning filler comprises the following steps: preparing a prepolymer from raw materials IPDI (isophorone diisocyanate), PEG (polyethylene glycol), castor oil and DMBA (dimethylbenzanthracene); adding triethylamine to carry out neutralization reaction to generate salt; and adding an ethylenediamine water solution to carry out emulsification and chain extension to prepare the water-based polyurethane emulsion. The coated film of the water-based polyurethane emulsion has favorable water resistance and yellowing resistance.

The invention discloses an ethylenediamine perchlorate.triethylene diamine perchlorate eutectic initiating explosive and a preparation method thereof. The initiating explosive is a eutectic compound of ethylenediamine perchlorate and triethylene diamine perchlorate, can be initiated under the action of outside excitation energy and has better explosion output power. The preparation method is as follows: the eutectic compound of the ethylenediamine perchlorate and the triethylene diamine perchlorate is prepared by the neutralization reaction through using ethylene, triethylene diamine and perchloric acid as raw materials under the solution state, wherein the molecular ratio of the ethylenediamine perchlorate and the triethylene diamine perchlorate in the prepared eutectic compound is 1:1. The invention has the advantages of small moisture absorption, large explosion power, simple manufacture process, energy saving, consumption reduction, and no harm to environment.

The invention relates to a preparation formula of a polishing solution for precision polishing of an LED sapphire substrate. The polishing solution comprises the following components in percentage by weight: 0.7-1.0% of organic base diethanol amine, 25-35% of silica solution with grain diameter of 50-70nm, 0.4-0.7% of dispersing agent ethanediamine, and 0.1-0.3% of activating agent nonylphenol polyoxyethylene ether. The removal rate of the polishing solution can be up to 28 nm / min; the surface roughness Ra is smaller than 0.5 nm, which can meet the main performance index requirements for sapphire substrate CMP (chemical mechanical polishing). The polishing solution has the advantages of high removal rate, low surface roughness and cost, non-pollution to the environment and non-corrosion to equipment.

The invention relates to a palladium coordination polymer molecule aggregate catalysis material as well as a preparation method and an application thereof. The catalysis material is a coordination polymer molecule aggregate catalysis material formed by self-assembling on the surface of a solid substrate, the precursor of the catalysis material comprises palladium coordination ion as well as pyridine containing multidentate ligand or high molecular ligand, wherein the palladium coordination ion is selected from one of tetrachloro combined palladium acid radical, dichloro-2, 2'-dipyridine palladous, and dichloroacetamide palladous, and the pyridine containing multidentate ligand or high molecular ligand is selected from one of 4, 4'-combined pyridine, 2, 4, 6- collidine triazine, metal or hollow tetra pyridyl porphyrin, trans-1, 2- collidine ethylene, combined dipyridylzinc thiocyanate and polyethylene pyridine. LB film preparation technology or layered assembly method is adopted for organism selective ethylenic bond organic hydrogenation reaction, thus having high catalysis efficiency, easy realization in separation of catalyst and reactant and product, convenient operation and low cost.

The invention discloses a nanometer micelle capable of intelligently releasing medicine as well as a preparation method and an application thereof. The nanometer micelle provided by the invention comprises the components of polyethylene glycol-poly (aspartate-cysteine)-poly (aspartate-diisopropyl ethanediamine). The preparation method comprises the following steps of: firstly, synthesizing PEG-PBLA-N3 and PA-PAsp (DIP); then, taking cuprous bromide / pentamethyldiethylenetriamine as a catalyst system, and synthesizing PEG-PBLA-PAsp (DIP) through a click reaction of PEG-PBLA-N3 and PA-PAsp (DIP); and finally, carrying out an aminolysis reaction on 2-aminoethyl mercaptan to obtain the final polymer PEG-PAsp (MEA)-PAsp (DIP). The nanometer micelle provided by the invention can be used as a hydrophobic medicine carrier. The nanometer micelle is sensitive to pH value, the disulfide bond in the intermediate cross-linking layer is sensitive to a reducing agent, and the nanometer micelle has the characteristic of intelligently releasing medicine.

The invention provides multi-functional fluorescence carbon quantum dots and a preparation method and application thereof. The preparation method of the carbon quantum dots comprises the following steps: by taking phthalic acid as a raw material, adding ethanediamine and strong phosphoric acid to obtain a pale yellow solid slice, after reaction is stopped, naturally cooling to room temperature, adding ultrapure water, stirring to obtain a pale yellow solution, filtering with a filter membrane, and freeze-drying to obtain nitrogen phosphorus codoped fluorescence carbon quantum dot powder. The preparation process of the carbon quantum dots is simple, the raw material is wide in source and low-cost, and the preparation method is simple and fast; the prepared carbon quantum dots are stable inoptical property and good in biocompatibility, not only can be used for detecting manganese ions in traditional Chinese medicines and tea leaves, but also can serve as a temperature sensor, and meanwhile can be used for cell imaging.