343 results about "Rhodamine B" patented technology

The invention discloses a long-life phosphorescent sulfur quantum dot, a multicolor long-life phosphorescent sulfur quantum dot composition and a preparation method and application thereof, and belongs to the technical field of phosphorescent materials and information encryption. The preparation method comprises the following steps: carrying out solvothermal reaction on a sulfur source and ethylenediamine to obtain sulfur quantum dots, and adding a sulfur quantum dot aqueous solution into a boric acid matrix to react to prepare long-life phosphorescent sulfur quantum dots (SQDs-MA); the long-life phosphorescent sulfur quantum dots and a rhodamine B aqueous solution are blended and dried to prepare the multicolor long-life phosphorescent sulfur quantum dot composition (RhB / SQDs-MA). When excited by ultraviolet light, the SQDs-MA shows a wide absorption range of 200 to 700 nm. When excitation is carried out at 362 nm, the SQDs-MA shows a blue fluorescence emission peak at 436 nm. The SQDs-MA powder emits bright green phosphorescence after the irradiation of an ultraviolet lamp is turned off, and under the optimal excitation of 373 nm, the maximum phosphorescence emission value is displayed at 526 nm. Under the irradiation of ultraviolet light, the RhB / SQDs-MA can emit yellow, orange and red phosphorescence at the wavelength of 584 nm, 600 nm and 620 nm.

The invention relates to the technical field of membranes, in particular to a photocatalytic self-cleaning BiOCl / COF composite membrane as well as a preparation method and application thereof. BiOCl nanosheets and COF nanosheets with photocatalytic characteristics are synthesized respectively, the two nanosheets are deposited on the surface of a polymer substrate film through a vacuum filtration technology, and due to the fact that a large number of oxygen-containing groups in the COF nanosheets improve the dispersity of the bismuth oxychloride nanosheets through hydrogen-bond interaction, disordered stacking of BiOCl in the stacking process is reduced, and the photocatalytic performance of the BiOCl nanosheets is improved. The COF is added to assist the bismuth oxychloride nanosheets in forming an interlayer channel with a screening effect, and the two nanosheets form a heterostructure, so that the photocatalytic capability of the composite film is enhanced. The preparation method of the composite membrane is simple, and the composite membrane has good permeability to Evans blue, Congo red, rhodamine B and other dyes, has excellent photocatalytic self-cleaning ability, and can be applied to separation of organic wastewater generated in the printing and dyeing industry.

The invention discloses a method for distinguishing similar antibiotics by using a fluorescent sensing array based on YOLOv5 target recognition. The method comprises the following steps: S1, preparing GMP-Tb solid powder; s2, mixing the GMP-Tb solid powder with a rhodamine B solution in proportion to obtain a multi-proportion fluorescent probe; s3, mixing antibiotics with different concentrations with the multi-proportion fluorescent probe to obtain a fluorescent sensing array; s4, collecting color images in the fluorescent sensing array and dividing the color images into a training set and a test set; s5, constructing an OLOv5 optic nerve model, inputting the acquired color image into a YOLOv5 optic nerve model, and outputting a feature value of the acquired color image; s6, inputting the characteristic value of the color image into a classifier model for prediction classification to obtain a distinguishing result; and S7, inputting a color image formed by mixing the to-be-detected antibiotic and the multi-proportion fluorescent probe into the YOLOv5 optic nerve model to obtain a characteristic value of the color image, and then outputting a distinguishing result through the classifier model.

The invention discloses a ratio-type fluorescence analysis method for determining sodium dehydroacetate, which comprises the following steps: under an alkaline condition, synthesizing tetrafluoroterephthalic acid oxide, namely a fluorescent substance TFAox, by oxidizing tetrafluoroterephthalic acid with hydrogen peroxide, and forming a ratio-type fluorescence probe by the fluorescent substance and rhodamine B, a ratio-type fluorescence analysis method of sodium dehydroacetate is constructed based on the ratio-type fluorescence probe, and the method can be successfully applied to determination of sodium dehydroacetate in a water sample and a bread sample. The ratio-dependent fluorescence detection method for determining sodium dehydroacetate provided by the invention has the characteristics of wide linear range, high detection sensitivity, no interference of coexisting substances on determination, good selectivity and the like.

The invention belongs to the technical field of photocatalytic materials, and discloses a preparation method of a BiOCl / BiOI composite photocatalyst for visible light degradation of rhodamine B. The energy band structure of BiOCl is regulated and controlled in cooperation with BiOI, and efficient photocatalytic decoloration of rhodamine B with wide spectral response is achieved through S-type interface charge transfer. A petal-shaped BiOCl / BiOI heterojunction with R = 8: 1, a BiOCl0. 88I0. 12 solid solution and a BiOCl0. 8I0. 2 solid solution show excellent visible light catalytic activity, and about 92.52% of rhodamine B molecules, 99.7% of rhodamine B molecules and 99.7% of rhodamine B molecules are respectively degraded by the BiOCl / BiOI heterojunction and the BiOCl0. 88I0. 12 solid solution after being irradiated by visible light for 10 minutes. The catalytic reaction accords with the two-stage one-stage kinetic law, and high photocatalytic efficiency can still be maintained after five times of circulation. The single BiOCl and BiOI respectively degrade about 64.3% and 10.02% of rhodamine B molecules under the same light reaction condition, and the catalytic reaction follows a first-level kinetic model. The preparation method has the advantages of being low in preparation temperature, simple in technological process, stable in chemical property and the like, the large-scale two-dimensional micron / nanosheet and the three-dimensional self-assembly structure of the large-scale two-dimensional micron / nanosheet can be obtained only through a hydrothermal and water bath synthesis technology, and the preparation method has great application value in the field of visible light degradation of organic pollutants.

The present invention belongs to the technical field of mechanochromic materials, and specifically relates to a mechanochromic material containing rhodamine with a hydantoin structure, and its preparation method and application. The rhodamine mechanochromic material containing a hydantoin structure is shown in structure (I), with rhodamine B as the matrix, reduced to rhodamine alcohol, oxidized to generate rhodamine aldehyde, and reacted with hydantoin to prepare a six-membered spirocyclic rhodamine containing a hydantoin structure. The rhodamine compound containing a hydantoin structure involved in the present invention has good ion interference resistance, exhibits photochromic properties in a dichloromethane solvent, and has the properties of mechanical stress discoloration and solvent mixing stress discoloration with high contrast and good repeatability. The solid powder of the rhodamine mechanochromic material containing a hydantoin structure has the characteristic of changing color upon grinding. After the action of mechanical force, the color of the powder changes from yellow to pink, and a reversible color change is achieved during the grinding-heating process.

The invention relates to the technical field of preparation of anti-counterfeiting films, and particularly discloses an ultraviolet fluorescent anti-counterfeiting film based on multi-layer optical variability and a preparation method of the ultraviolet fluorescent anti-counterfeiting film. The ultraviolet fluorescent anti-counterfeiting film based on multilayer optical variability comprises a film substrate layer, a first optical variability layer and a second optical variability layer, wherein the first optical variable layer and the second optical variable layer are located on the two sides of the thin film base material layer respectively; the first optical variable layer and the second optical variable layer respectively comprise rhodamine B, fluorescein sodium and europium oxide. According to the ultraviolet fluorescent anti-counterfeiting film, the first light-variable layer and the second light-variable layer which contain light-variable materials such as rhodamine B, fluorescein sodium and europium oxide are arranged on the two sides of the film base material layer, so that the prepared multi-layer light-variable ultraviolet fluorescent anti-counterfeiting film has relatively short ultraviolet radiation color change reaction time; wide application prospects are realized.

The present invention is a method for fluorescent detection of copper ions. The method uses an amino-functionalized zirconium dioxide nanotube array film as a carrier and rhodamine B as a fluorescent probe, and immobilizes copper ions and rhodamine B on the amino-functionalized zirconium dioxide nanotube array film carrier to prepare a detection sample, and the detection of copper ions can be achieved by testing the fluorescence intensity of the detection sample. The method is simple and easy to implement, has good detection performance, low cost, small amount of waste liquid, and the amino-functionalized zirconium dioxide nanotube array film carrier can be regenerated and reused.

The invention discloses an In2O3 / ZnO / BiOBr catalyst for efficiently degrading rhodamine B and a preparation method of the In2O3 / ZnO / BiOBr catalyst. The In2O3 / ZnO / BiOBr photocatalyst with a high specific surface area is prepared through a simple one-pot hydrothermal method, the degradation performance of the photocatalyst is improved through simultaneous coupling of In2O3, ZnO and BiOBr, formed double-Z-type heterojunctions are beneficial to inhibition of recombination of photon-generated carriers, and organic dye rhodamine B can be efficiently degraded through construction of the structure. And after sunlight irradiation is simulated for 40 minutes, the degradation rate of rhodamine B reaches 98.80%, and after four continuous degradation experiments, the degradation rate is not obviously attenuated. The material is simple in preparation method and excellent in degradation performance, and has a wide application prospect in the field of organic pollutant removal.

The invention discloses a green detection method for determining trace heavy metal ion pentavalent antimony-Sb (V) in water based on a rhodamine B-cloud point extraction-atomic furnace graphite absorption method. The rhodamine B is used as a complexing agent of Sb (V), so that the color development is sensitive, and the complexing is stable. According to the method, the nonionic surfactant Triton X-114 is used as the extraction agent, the cloud point temperature is low, a complex can be efficiently extracted, a micelle phase is formed, the extraction agent is easily and effectively separated from a water phase, cloud point extraction is carried out under ultrasonic assistance to enrich and concentrate trace antimony, the enrichment factor is high, matrix interference in a water sample to be detected can be effectively eliminated, and the detection precision of Sb (V) is improved. By adopting a cloud point extraction technology, the use amount of an organic reagent can be effectively reduced, and the waste liquid treatment cost is reduced. According to the method, other oxidation methods can be combined, total antimony can be measured based on complexing color development of Sb (V), valence state distribution of free antimony can also be measured, and the method has wide applicability.

The invention relates to preparation of a molybdenum disulfide coated barium titanate nano material and application of the molybdenum disulfide coated barium titanate nano material in the field of piezoelectric light concerted catalysis. Compared with pure-phase MoS2 and BaTiO3, the molybdenum disulfide coated barium titanate nano material synthesized by a hydrothermal method shows a remarkably enhanced piezoelectric optical effect. Under the synergistic effect of ultrasound and light, the molybdenum disulfide coated barium titanate nano material can realize efficient degradation of rhodamine B and remarkable improvement of hydrogen production efficiency, the degradation rate constants are 2.3 and 14.4 times of those of pure-phase MoS2 and BaTiO3 respectively, and the hydrogen production efficiency is 2.3 and 1.9 times of those of pure-phase MoS2 and BaTiO3 respectively. The piezoelectric catalyst BaTiO3 and the photocatalyst MoS2 can be well combined to form a heterojunction, so that the electron-hole separation efficiency is improved. The invention discloses a method for improving the production of hydrogen by degrading rhodamine B and decomposing water by the material by constructing the heterojunction, and the method is simple in process flow, high in operability and wide in application prospect.

The invention relates to the technical field of fluorescence detection, in particular to a cadmium-metal-based fluorescent metal organic framework material, a preparation method of the cadmium-metal-based fluorescent metal organic framework material, a fluorescent sensor array and application of the cadmium-metal-based fluorescent metal organic framework material. Fluorescent probe molecules with different proportions can be obtained by changing the doping concentration of rhodamine B, the RhB (at) MOF has an emission peak of Cd-MOF at 430nm and an emission peak of rhodamine B at 570nm, and when the material is in contact with different benzene series solvents, the relative emission intensity of host-guest emission peaks is almost constant, and the material is unique for each RhB (at) MOF, so that the fluorescent probe can be used for detecting the fluorescence of the RhB (at) MOF. Benzene, toluene, xylene and ethylbenzene are specifically distinguished by using different relative emission ratios of host and guest emission peaks, a fluorescent sensing array is constructed to identify benzene series, and fluorescent probe molecules can be prepared into a fluorescent film to realize portable detection.

The invention discloses a high-performance lead-free piezoelectric catalytic material and a preparation method and application thereof, and belongs to the field of catalytic materials and pollution abatement, the preparation method of the lead-free piezoelectric catalytic material comprises the following steps: weighing K2CO3, Na2CO3, Nb2O5, Fe2O3 and Co2O3, mixing, performing ultrasonic dispersion treatment, and then performing grinding and presintering treatment to obtain precursor powder; grinding the precursor powder again, and then tabletting to obtain a green body; the green body is subjected to sintering treatment and grinding treatment in sequence, and ceramic powder is obtained; the ceramic powder is placed in pure water for ultrasonic treatment, then drying treatment is conducted, and the lead-free piezoelectric catalytic material is obtained. The potassium-sodium niobate-based lead-free piezoelectric catalytic material prepared through the processes of compact sintering, grinding, pure water ultrasonic treatment and the like has extremely high spontaneous polarization, has a very obvious effect on piezoelectric catalytic degradation of rhodamine B, and has the advantages of being environmentally friendly, efficient, high in catalytic activity, safe, stable, capable of reacting at normal temperature and the like.

The invention belongs to the technical field of piezoelectric catalytic materials, and particularly relates to a piezoelectric catalytic material based on a wood porous structure and a preparation method of the piezoelectric catalytic material. The invention provides a piezoelectric catalytic material based on a wood porous structure. The piezoelectric catalytic material comprises wood with a porous structure, molybdenum disulfide and reduced graphene oxide, wherein the molybdenum disulfide and the reduced graphene oxide are loaded on the porous structure. Molybdenum disulfide, reduced graphene oxide, rGO and MoS2 are loaded on the porous wood to form a nano heterojunction, so that the porous wood has the characteristics of good conductivity and high carrier separation efficiency, carriers (electrons and holes) generated by MoS2 in the piezoelectric process can be effectively captured and transmitted, the piezoelectric catalytic performance of the porous wood is improved, and the preparation method is simple and easy to implement. Under normal-temperature and ultrasonic conditions, the composite material has relatively high degradation efficiency on organic dyes (methylene blue and rhodamine B), and has relatively high cyclic utilization rate.

The invention discloses a preparation method of a bacterial cellulose / bismuth molybdate composite photocatalytic material, which comprises the following steps: firstly, carrying out alkali washing on in-situ growth bacterial cellulose, and freeze-drying for later use; shearing a certain amount of bacterial cellulose to prepare a bacterial cellulose suspension, and adding bismuth molybdate powder; carrying out ultrasonic full mixing, and carrying out vacuum filtration and hot pressing; and finally, preparing the bacterial cellulose / bismuth molybdate composite photocatalytic material. According to the invention, an in-situ growth and vacuum filtration method is adopted, so that the method is low in cost, green and pollution-free, and does not need high-temperature reaction; meanwhile, the bacterial cellulose / bismuth molybdate composite photocatalytic material is good in stability, can be recycled and has excellent photocatalytic performance, the degradation rate of rhodamine B can reach 70% or above within 150 min, and the degradation rate of the bacterial cellulose / bismuth molybdate composite photocatalytic material can still reach 50% or above after 5 times of experiments are cyclically repeated.

The invention discloses an IEF-11 / WO3-xS type heterojunction material with full spectrum response as well as a preparation method and application of the IEF-11 / WO3-xS type heterojunction material. The heterojunction is prepared by taking squaric acid, tetrabutyl titanate and WO3-x particles as raw materials, wherein the value range of x in WO3-x is 0 < = xlt; 1. The heterojunction material creatively realizes full-spectrum response from ultraviolet to near infrared through S-type energy band structural design, the separation efficiency of photo-induced electron-hole pairs reaches 2.47 times (compared with WO3-x) and 1.57 times (compared with IEF-11) due to a unique carrier transport mechanism, and strong redox sites are synchronously reserved, so that the material can be applied to the field of photoelectron-hole separation. And compared with a single-component material, the photocatalytic performance is improved by 3.74 times (compared with WO3-x) and 1.41 times (compared with IEF-11). Experiments show that under full-spectrum irradiation, the inactivation rate of the material to escherichia coli can reach 99%, the 120-minute degradation rate of the material to tetracycline (TC) reaches 86%, the material shows broad-spectrum degradation capacity to typical organic pollutants such as chlortetracycline (CTC), rhodamine B (RhB) and methylene blue (MB) in a visible region, and the 120-minute degradation efficiency reaches 77%, 53% and 95% respectively. The heterojunction material is prepared through a simple hydrothermal method, and has important application value in the fields of environmental governance, photocatalytic disinfection and the like.

A system for the synthesis of a cost-effective photocatalyst based on the FeOOH / CuBi2O4 heterostructure, consisting of: a) a CuBi2O4 synthesis plant for the production of CuBi2O4 (CBO) microspheres from Bi(NO3)3·6H2O and Cu(NO3)2.3H2O precursors; b) a heterostructure formation unit is configured to deposit FeOOH nanoparticles onto an outer surface of the CBO microspheres to form an FeOOH / CBO heterostructure; and c) a processing unit configured to wash and dry the FeOOH / CBO heterostructure to obtain the photocatalyst.

The invention discloses a polyacid-based metal viologen framework crystalline material as well as a preparation method and application thereof, and belongs to the technical field of heterogeneous catalytic materials. The crystalline material is synthesized in one step through a hydrothermal method, the molecular formula is Cu2 (H2O) 2 (L) 2 [PW12O40] [OH]. 2H2O, the crystalline material belongs to a monoclinic system, the space group is P21, the cell parameters are alpha = 90 degrees, beta = 114.208 (2) degrees and gamma = 90 degrees, and the structure of the crystalline material is determined through X-ray diffraction. According to the material, accurate compounding of polyacid clusters and metal viologen on the molecular level is achieved, an effective electron transmission channel is constructed, separation of photon-generated carriers is remarkably promoted, and excellent photocatalytic activity is shown. At the ambient temperature, the crystalline material can be used as a catalyst to efficiently degrade dye pollutants (such as methylene blue and rhodamine B) in a water body, the degradation rate within 60 minutes exceeds 90%, and the crystalline material has good cycle stability and structural durability.

The invention discloses an afterglow-color-adjustable circularly-polarized room-temperature phosphorescent polymer film and a preparation method and application thereof, and the afterglow-color-adjustable circularly-polarized room-temperature phosphorescent polymer film is prepared by taking a chiral naphthalene phosphate derivative as an energy and chiral transfer donor and selecting a fluorescent dye rhodamine B (RB) as an acceptor. And co-doping with a polymer matrix to obtain the afterglow color adjustable circular polarization room-temperature phosphorescent polymer film. The obtained polymer film has good transparency, high room-temperature phosphorescence efficiency and asymmetric factors, accurately controllable multi-color afterglow and ultra-long afterglow life, which means that the polymer film has important application prospects in the fields of multiple anti-counterfeiting encryption and the like.

The present invention discloses a six-membered spirocyclic rhodamine copper ion fluorescent probe containing a benzothiazole hydrazine Schiff base structure, a preparation method thereof, and an application thereof. The six-membered spirocyclic rhodamine copper ion fluorescent probe containing a benzothiazole hydrazine Schiff base structure has the structural formula shown in (I). The preparation method comprises the following steps: weighing equimolar amounts of 2-aldehyde rhodamine B and 2-hydrazine benzothiazole, dissolving them in dry ethanol, heating to 80°C for reaction for 4 hours, cooling to room temperature, and distilling under reduced pressure. The obtained solid is purified by column chromatography to obtain a light pink solid, which is the six-membered spirocyclic rhodamine copper ion fluorescent probe containing a benzothiazole hydrazine Schiff base structure. The fluorescent probe of the present invention has good sensitivity to copper ions and can qualitatively and quantitatively detect copper ions in a solution.

Provided are a system for monitoring a hydroxyl radical scavenging index in water using a real-time multi-fluorescence analyzer and a parallel factor analysis apparatus and a method therefor, wherein the system monitors the hydroxyl radical scavenging index in water using the real-time multi-fluorescence analyzer and the parallel factor analysis apparatus, whereby it is possible to monitor the characteristics of an organic material in target water through a continuous flow analysis method without using an existing indicator material, rhodamine B. In addition, in a water treatment system having an advanced oxidation process (AOP) applied thereto in which ozone, ultraviolet rays, hydrogen peroxide, and the like are combined, it is possible to simply calculate the hydroxyl radical scavenging index in the target water through an organic material characteristic index for each component obtained by classifying the characteristic structure of the organic material in water using real-time fluorescence analysis by means of a parallel factor (PARAFAC) model. Accordingly, the amount of chemical injection and the amount of ultraviolet irradiation, which are process control variables, can be controlled, and under given operating variable conditions, the removal rate of a target material in water is predicted, whereby the system can also be used as a diagnostic tool for process evaluation in the advanced oxidation process. Furthermore, the system can provide operational convenience that enables process control while reducing the amount of power consumed in the advanced oxidation process even though the type of target material and the water quality characteristics of raw water change.

The invention relates to the technical field of preparation of photocatalytic materials, in particular to a preparation method of a ZnWO4 and Bi2WO6 composite photocatalyst, which is characterized in that a monomer photocatalyst of ZnWO4 and a monomer photocatalyst of Bi2WO6 are respectively prepared by a hydrothermal method, and then a binary ZnWO4 / Bi2WO6 composite photocatalyst is prepared by a secondary hydrothermal method. The composite structure of the composite photocatalyst is beneficial to separation and transfer of photon-generated carriers, an organic pollutant rhodamine B solution with the concentration of 10 ppm can be degraded, excellent photocatalytic degradation performance is shown under excitation of visible light, and the preparation method is simple, easy to operate and suitable for application and popularization.

The invention relates to an amorphous bismuth molybdate photocatalytic material as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The preparation method of the amorphous bismuth molybdate photocatalytic material comprises the following steps: (1) dissolving Bi (NO3) 3.5 H2O in an HAC solution, uniformly mixing and stirring at room temperature, and marking as a solution A; dissolving Na2MoO4 in water, adding a water-soluble anionic polymer, uniformly stirring, and marking as a solution B; and (2) slowly dropwise adding the solution B into the solution A, carrying out a co-precipitation reaction under the conditions of normal temperature and normal pressure, after dropwise adding is completed, maintaining heating and stirring for a period of time, then carrying out normal-temperature stirring, and after stirring is completed, carrying out centrifugation, washing and drying to obtain the amorphous bismuth molybdate photocatalytic material A-Bi2MoO6. The modified amorphous A-Bi2MoO6 provided by the invention has a relatively large specific surface area and more mesoporous structures, so that the adsorption of rhodamine B is enhanced, and the adsorbed dye can be efficiently catalyzed and degraded under the action of illumination.

The invention discloses a g-C3N4 / vat yellow GCN composite photocatalyst and a preparation method thereof, g-C3N4 improves the photocatalytic performance of vat yellow GCN, efficient degradation of methyl orange and rhodamine B is realized by optimizing the ratio of g-C3N4 to vat yellow GCN, the degradation rate of methyl orange reaches 81%, and the degradation rate of rhodamine B is close to 100%; the active group involved in the process of degrading methyl orange by the g-C3N4 / vat yellow GCN composite photocatalyst is mainly. O < 2->; the g-C3N4 / vat yellow GCN composite photocatalyst has good photocatalytic stability, still has a good degradation effect on methyl orange after being used for three times, the degradation rate is higher than 80%, and the g-C3N4 / vat yellow GCN composite photocatalyst has good application prospects in the field of photocatalytic degradation of organic dye wastewater.

The invention discloses a mixed valence copper doped bismuth vanadate nanodisk photocatalyst and a preparation method and application thereof, a main body of the catalyst is a bismuth vanadate nanodisk, copper is doped in the bismuth vanadate nanodisk, and the copper is composed of Cu < + > and Cu < 2 + >; the catalyst has the characteristics of high stability, simplicity in implementation, high universality and the like. The doped copper ions not only can improve the light absorption capacity of the bismuth vanadate material, but also can promote the rapid separation of photo-induced electrons and holes of the bismuth vanadate material by virtue of the mixed valence state of the copper ions, and improve the carrier dynamics on the material, so that the photocatalytic efficiency of the bismuth vanadate material is improved. The bismuth vanadate photocatalyst doped with the copper ions in the mixed valence state has an efficient photocatalytic degradation effect on pollutants such as rhodamine B and the like, and has a wide application prospect in the technical aspects of environmental pollutant degradation and green advanced oxidation.

According to the method, melamine and urea are used as carbon and nitrogen sources, hollow tubular phosphorus-doped carbon nitride is constructed by adopting a sodium polyphosphate-assisted hydrothermal-thermal polymerization method, molybdenum disulfide is loaded on the surface of P-TCN in a hydrothermal in-situ growth mode, and the hollow tubular phosphorus-doped heterojunction photocatalyst is obtained. The hollow tubular phosphorus-doped heterojunction photocatalyst P-TCN / MoS2 is prepared; the catalyst disclosed by the invention shows excellent degradation performance on ciprofloxacin, levofloxacin, rhodamine B and methylene blue under an illumination condition. The catalyst disclosed by the invention is simple in preparation method, low in cost and easily available in raw materials, and has a wide application prospect in the field of photocatalytic treatment of antibiotic and dye wastewater.

The invention discloses a preparation method and application of a bimetallic nano-enzyme induced MOFs (at) CDs material, and the preparation method at least comprises the following steps: I, dissolving FeCl3, CoCl2 and 2-aminoterephthalic acid in N, N '-dimethylformamide to form a mixed solution I, and carrying out a reaction I to obtain a bimetallic MOFs material; step II, mixing tricarballylic acid and m-phenylenediamine, and carrying out a reaction II to obtain carbon dot powder; step III, dissolving the carbon dot powder obtained in the step II in methanol, and adding rhodamine B dye to obtain a CDs material; and IV, dissolving the bimetallic MOFs material obtained in the step I and the CDs material obtained in the step III in water, stirring, and drying to obtain the MOFs (at) CDs material. The synthesized nano-enzyme is simple to prepare and high in catalytic activity, the carbon dot material is encapsulated into the MOFs material, the fluorescence characteristic of the MOFs material is enhanced, and the carbon dot material is combined with o-phenylenediamine to be used for detecting H2O2.

The invention provides spherical lignin-phenolic resin, a preparation method thereof and application of the spherical lignin-phenolic resin in adsorption of N-containing organic dye, and belongs to the technical field of adsorption materials. The lignin-phenolic resin with the regular spherical morphology can be prepared through a one-step condensation polymerization reaction by taking lignin, hydroquinone and trioxymethylene as raw materials under an acidic catalysis condition and adopting a reversed-phase suspension polymerization method, the lignin belongs to a renewable resource and has the characteristics of low cost and environmental friendliness, and the lignin-phenolic resin can be used for preparing the lignin-phenolic resin with the regular spherical morphology. The phenolic resin can replace phenols to become a main phenol source, the substitution rate can reach 75%, and the yield of the synthesized phenolic resin reaches up to 60-80%. Besides, abundant phenolic hydroxyl groups, sulfonic acid groups and other oxygen-containing groups can be introduced into the resin by selecting the types of monomers, the cross-linked structure of the resin is changed by regulating and controlling the proportion of the monomers, the adsorption capacity of N-containing organic dyes is effectively improved, and efficient adsorption of rhodamine B and methylene blue can be achieved.

The invention discloses a preparation method and application of a long afterglow photocatalyst based on a precious metal nanoparticle and aluminosilicate compound, and belongs to the technical field of catalysis. And after the Pr < 3 + >-doped calcium aluminum silicate matrix is irradiated by 254nm ultraviolet light for 10 minutes, long afterglow which is more than 1 hour is obtained in the Pr < 3 + >-doped calcium aluminum silicate matrix. Precious metal nano particle loaded aluminosilicate long afterglow fluorescent powder is used for improving afterglow luminescence. The loaded noble metal nanoparticles can enhance the afterglow luminescence of the aluminosilicate long afterglow fluorescent powder and prolong the afterglow luminescence time. The afterglow luminescence of the precious metal-loaded aluminosilicate long afterglow fluorescent powder is used as a light source to degrade organic pollutants in a dark environment, the degradation efficiency of rhodamine B reaches 40%, the degradation efficiency of tetracycline hydrochloride reaches 15%, the degradation efficiency of ciprofloxacin reaches 20%, and the degradation efficiency of the precious metal-loaded aluminosilicate long afterglow fluorescent powder reaches 20%. The result shows that the aluminosilicate long-afterglow fluorescent powder loaded by the noble metal nanoparticles has excellent degradation capability.

The preparation method comprises the following steps: firstly, dissolving gelatin in deionized water to form a gelatin solution, adding rhodamine B and a catalyst, and carrying out amidation reaction to chemically bond amino groups of the gelatin with carboxyl groups of the rhodamine B; then adding a cross-linking agent to cross-link the rhodamine B-gelatin conjugate into nano particles, and enabling the rhodamine B-gelatin fluorescent nano thermometer to be ellipsoidal by utilizing centrifugal force formed by high-speed stirring in the cross-linking process. The rhodamine B is firmly loaded on the gelatin nanoparticles, the loading capacity of the rhodamine B is greatly increased, the residence time of the rhodamine B in an organism is prolonged, the photobleaching effect of the rhodamine B is overcome, the rhodamine B-gelatin fluorescent nanoparticles are prepared into ellipsoids through uneven stress under the action of centrifugal force when aggregated particles are formed, and the rhodamine B-gelatin fluorescent nanoparticles are prepared into the ellipsoids. The preparation method is simple, the temperature measurement sensitivity is high, the photobleaching phenomenon of rhodamine B is effectively weakened, and the biomedical utilization prospect is good.