39results about How to "Obvious absorption peak" patented technology

Disclosed are a metallic silver filled photonic crystal optical fiber capable of spontaneously generating SPR effect and a preparation method thereof, and belongs to the technical field of optical fiber intelligent communication. The optical fiber comprises a fiber core and a cladding, the fiber core is a solid quartz glass rod, the cladding comprises a quartz glass capillary tube, an air hole, and a silver wire, a multilayer quartz glass capillary tubes are arranged around the longitudinal direction of the fiber core, and a silver wire is arranged at the air hole of one quartz glass capillarytube in the second layer quartz glass capillary tube. The preparation method is as follows: according to the design structure, the arrangement structure, and the drawing optical fiber, the prepared optical fiber can spontaneously generate the SPR effect. The method can prepare the photonic crystal optical fiber capable of spontaneously generating SPR effect of different air hole structures and sizes, no need to subsequently coat or fill the optical fiber, and the resonance peak position can be adjusted by adjusting the diameter of the air hole, filling the diameter of the silver wire and theouter diameter of the capillary tube, the performance is good, meanwhile the method has the advantages of simple structure, convenience in preparation, adjustable adjustment and the like, and can be applied to the manufacturing of various optical components.

The invention discloses a manufacturing method of environment-friendly five-layer plywood and belongs to the technical field of wood processing. The method comprises the following steps of veneer drying, blank grouping treatment, hot-pressing treatment, cold-pressing treatment, edge cutting and polishing, wherein in the step of blank grouping treatment, veneers subjected to drying treatment are subjected to blank grouping, and every five veneers serve as a group; the five veneers is combined into a five-layer plate blank from bottom to top; every two adjacent veneers are bonded through a special adhesive; the special adhesive comprises, by weight, 50-60 parts of modified phenolic glue, 20-30 parts of casein-soybean glue, 8-12 parts of sodium hydroxide, 4-8 parts of anti-enzyme agent, 4-8 parts of fire retardant and 15-20 parts of filling agent. Through the manufacturing method, the problem that existing five-layer plywood release a great deal of formaldehyde is solved.

The invention discloses a novel photocatalytic sensitizer and a preparation method thereof. The preparation method comprises the steps of: preparing amino cobalt phthalocyanine with chitosan as a base material; modifying and subjecting the amino cobalt phthalocyanine to grafting reaction with the chitosan by adopting a heterogeneous manner to obtain nitro phthalocyanine firstly, and then obtain amino phthalocyanine; modifying the phthalocyanine with maleic anhydride; and finally, subjecting the modified phthalocyanine to grafting reaction with the chitosan to obtain a novel catalyst of chitosan grafted butadiene acid acylamino cobalt phthalocyanine. In comparison with the traditional inorganic sensitizer, the novel photocatalytic sensitizer prepared by the invention has the advantages of capabilities of being degraded biologically and used repeatedly, stable nature and low cost.

The invention discloses an intelligent ultraviolet gas analyzer. The intelligent ultraviolet gas analyzer consists of an ultraviolet light source, a narrow-band interference filter, a measurement gas chamber, a photoelectric detector at a reference side and a photoelectric detector at a measurement side. A side edge of an outlet of the ultraviolet light source is provided with a rotatable light sectioning wheel, and two ends of the light sectioning wheel are respectively provided with a gas light filter which can be alternately placed at the outlet of the ultraviolet light source by rotation of the light sectioning wheel and uviol. The intelligent ultraviolet gas analyzer can accurately measure contents of SO2, NOx and H2S which are main flue gas in real time, achieves lower measurement range of 0-100PPm, higher sensitivity and better stability, and has service life of 8-10 years.

The invention relates to a near-infrared spectrum detection method for the sucrose content of soybean seeds. The method is characterized in that the method comprises the following steps: combining natural and artificially added sucrose soybean samples to form a calibration sample set; collecting spectral data by utilizing a near infrared spectrum analyzer; and constructing a near-infrared spectrumquantitative analysis and prediction model of the sucrose content of the soybean seeds by using enzymatic colorimetric method chemical value determination, spectral data preprocessing and a partial least squares regression statistical method, and detecting the sucrose content of an unknown soybean seed sample by using the near-infrared spectrum mathematical model. The near-infrared spectrum detection method established by the invention is relatively strong in prediction capability and relatively good in applicability; the method can be effectively applied to accurate measurement of the sucrose content of the soybean seeds, can provide data support for rapid measurement of sucrose indexes of raw material soybeans and timely adjustment of production process parameters or raw material proportions of soybean products, and can also meet the requirements of rapid and accurate identification of new high-sucrose soybean breeding lines.

The invention relates to a method for detecting high-concentration copper ions by spectrophotometry, which comprises the following steps: adding an imidazole or substituted imidazole solution into a water body containing copper ions, uniformly mixing and standing to obtain a sample solution to be detected, and directly measuring the concentration of the copper ions by spectrophotometry according to the absorbance of the sample solution to be detected, the detection method provided by the invention realizes rapid, timely and sensitive detection of copper ions in a solution, the detection is accurate, the sensitivity is high, the operation is simple, the imidazole-copper ion complex has an obvious absorption peak at 610nm, the linear response interval of the peak is relatively large, UV spectral lines before and after coordination are not overlapped, and the detection result is accurate. After imidazole and copper ions are coordinated, the absorbance and the concentration are both in a linear relationship, and R2gt; the linear relation of a standard curve is good, and the method is suitable for quantitative measurement in a relatively large copper ion concentration range.

The invention relates to barium magnesium niobate light-emitting ceramics and a preparation method thereof.The formula of the barium magnesium niobate light-emitting ceramics is Ba(1-x)Smx(Sn0.1Mg0.3Mg0.3Nb0.6)O3, wherein 0.005< / =x< / =0.03.The preparation method includes the steps of firstly, performing ball milling on a barium-source compound, a samarium-source compound, a magnesium-source compound, a tin-source compound and a niobium-source compound according to the weight requirements of the formula, then sintering under 1300-1350 DEG C to obtain products, and performing secondary ball milling on the products to obtain ceramic powder; secondly, adding a polyvinyl alcohol aqueous solution into the ceramic powder for pelleting, aging, crushing to obtain ceramic particles, forming the ceramic particles to obtain ceramic bodies, and preparing the ceramic bodies into even-pressure ceramic bodies through isostatic cool pressing; thirdly, sintering the even-pressure ceramic bodies under oxygen atmosphere after the even-pressure ceramic bodies discharge glue, cooling along with a furnace, and coarsely polishing and finely polishing to obtain the barium magnesium niobate light-emitting ceramics, wherein sintering temperature is 1500-1600 DEG C, and the temperature is kept for 48-60 hours.The barium magnesium niobate light-emitting ceramics have the advantages that the crystal boundary of the ceramics has no impurity phases, and the ceramics are good in compactness, even in grain size, high in chemical stability, and good in physical performances such as compressive strength; the ceramics have evident absorption peak in the visible light range, the quenching concentration can reach 2%mol, and high light-emitting intensity is achieved.

The invention relates to a preparation method of a carbon nanotube / paraffin microcapsule with light absorption performance. The preparation method comprises the following steps: first acidifying and grafting a carbon nanotube to obtain a polyhydroxy carbon nanotube; nitrifying and reducing tetraphenylporphyrin to obtain amino porphyrin; secondly, placing the polyhydroxy carbon nanotube in a round-bottom flask with distilled water, ultrasonically dispersing, and adding melamine, urea and a formaldehyde solution into the system to prepare a prepolymer; then adding the amino porphyrin into molten paraffin, ultrasonically dispersing, adding an emulsifier and distilled water, and preparing an emulsion; and finally mixing the prepolymer, the emulsion, sodium chloride, glacial acetic acid and a curing agent, and reacting to obtain the microcapsule. The phase change potential heat is increased, and the carbon nanotube is uniformly dispersed in the compound paraffin to increase the heat conductivity, so that the stability of the emulsion is improved; the heat conducting performance of a wall material is improved, and the heat storage and release efficiency of the microcapsule is improved; and meanwhile, the microcapsule has an obvious absorption peak in a visible light zone, and has a photosensitive property.

The present invention relates to the preparation and application of a solid-state fluorescent probe for detecting carbon monoxide (CO). The structural formula of the fluorescent probe is: Dihydroquinazoline)-4-hydroxybenzaldehyde, 1-ethyl-2-methylquinoline, allyl chloroformate, etc. are the preparation method for synthesizing the solid-state fluorescent probe as raw materials; first, the solid-state fluorescent The probe has a long wavelength, emits strong fluorescence at 650nm, is insoluble in water and has anti-diffusion ability; secondly, the fluorescent probe shows high sensitivity to CO, and the fluorescence of the probe is significantly enhanced after the reaction of the probe with CO; and , the solid-state fluorescent probe exhibits high selectivity to CO, and is not interfered by other reactive oxygen species, reactive nitrogen species, reactive sulfur, biothiols, and common ions; in addition, the solid-state fluorescent probe reacts rapidly with CO and responds The time is within 100s; finally, the solid-state fluorescent probe is applied to the detection of carbon monoxide content in living cells, and can perform fluorescence imaging of CO.

The invention discloses a preparation method of a polyvinyl alcohol composite film with embedded silver-wrapped nanoparticles, comprising the following steps: (1) preparing a polyvinyl alcohol-silver nitrate solution; (2)preparing a polyvinyl alcohol-silver nitrate film by using spin coating method or casting film method; and (3) irradiating the polyvinyl alcohol-silver nitrate film with ultraviolet light. The prepared composite film has the characteristics of uniform metal nanoparticle size distribution, controllable dimension, uniform shape, and uniform dispersion.

The invention relates to the technical field of compounds, in particular to a modified nano particle as well as a preparation method and application thereof. The modified nano particle comprise an inorganic nano particle, and a poly-o-phenylenediamine layer coating the surface of the inorganic nano particle. The applicant creatively discovers that the modified nano particle can catalyze the reaction of oxygen and water under a neutral condition (pH value is 7.0) to generate hydrogen peroxide; and a substrate TMB (3, 3 ', 5, 5'-tetramethyl benzidine) can be oxidized, so that an obvious absorption peak is generated at the 658 nm position of the ultraviolet-visible spectrum, and the unique oxidation-reduction type nano-enzyme catalytic activity is provided;.

Disclosed are a metallic silver filled photonic crystal optical fiber capable of spontaneously generating SPR effect and a preparation method thereof, and belongs to the technical field of optical fiber intelligent communication. The optical fiber comprises a fiber core and a cladding, the fiber core is a solid quartz glass rod, the cladding comprises a quartz glass capillary tube, an air hole, and a silver wire, a multilayer quartz glass capillary tubes are arranged around the longitudinal direction of the fiber core, and a silver wire is arranged at the air hole of one quartz glass capillarytube in the second layer quartz glass capillary tube. The preparation method is as follows: according to the design structure, the arrangement structure, and the drawing optical fiber, the prepared optical fiber can spontaneously generate the SPR effect. The method can prepare the photonic crystal optical fiber capable of spontaneously generating SPR effect of different air hole structures and sizes, no need to subsequently coat or fill the optical fiber, and the resonance peak position can be adjusted by adjusting the diameter of the air hole, filling the diameter of the silver wire and theouter diameter of the capillary tube, the performance is good, meanwhile the method has the advantages of simple structure, convenience in preparation, adjustable adjustment and the like, and can be applied to the manufacturing of various optical components.

The invention discloses a method for rapidly hydrothermally preparing a tetragonal copper bismuthate photocatalyst. The method comprises the following steps: respectively preparing an acetic acid solution of bismuth nitrate pentahydrate and an ethanol solution of copper nitrate trihydrate, and then mixing the two under stirring. , and then dropwise add lye to the solution to pH=14, transfer the above mixed solution to a high pressure reactor at 90-150 ℃ for hydrothermal reaction, and then carry out centrifugal washing and vacuum drying on the obtained product to obtain the morphology of Dumbbell-shaped tetragonal copper bismuthate powder. The preparation process is simple, the reaction temperature is lower than the traditional hydrothermal method, and the preparation time is short, the synthesized powder has good crystallinity, high purity, controllable grain size, relatively uniform size, and good visible light response performance, at 650-700nm There is an obvious absorption peak at , and the methylene blue solution is degraded synergistically with H2O2 under visible light, and the degradation efficiency can reach 90% to 100% within 30 minutes.

The invention mainly aims to provide a compound selectively recognizing mercury ions and a preparation method and application thereof. The preparation method includes following steps: 1), providing a first solution which contains a rhodamine compound dispersed in a first solvent; 2), heating the first solution, and mixing the first solution with a hydrazine hydrate solution for reaction to obtain rhodamine hydrazide; 3), providing a second solution which contains rhodamine hydrazide dispersed in a second solvent; 4), heating the second solution, mixing the second solution with a Lawson reagent, reacting in an inertial gas atmosphere, and separating out sulfur hydrazide; 5), providing a third solution which contains sulfur hydrazide dispersed in a third solvent; 6), heating the third solution, mixing the third solution with terephthalaldehyde, reacting under catalysis of glacial acetic acid and in inertial gas, and filtering to obtain a product. The synthesis process is free of byproduct generation, and the compound is simple in purifying operation and has good selective recognition effect on Hg2+.