59 results about "Rhodamine" patented technology

The application provides a cucurbituril fluorescent probe and a preparation method and application thereof, and a qualitative and quantitative detection method of melamine, and belongs to the field of substance detection. The application provides a cucurbituril fluorescent probe, which comprises cucurbit[8]uril (CB[8]) and rhodamine, and the rhodamine is included in the cavity of the cucurbit[8]uril. The application contains the rhodamine in the cavity of CB[8] through host-guest non-covalent interaction, and aims at detecting melamine; the probe has high sensitivity, simple operation and the characteristics of rapid detection.

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 present application relates to a kind of electron donor (alpha-trithiophene) modified rhodamine dye, its synthesis method and application.The dye has strong absorption of 500-600 nm, can emit efficiently in 550-700 nm band, suitable for deep tissue imaging.The structure endows mitochondria targeting ability, can be used as biomarker probe to realize subcellular organelle accurate positioning;Meanwhile, under light, it can efficiently produce reactive oxygen species through type I mechanism, suitable for the photodynamic regulation and biosensing for non-disease diagnosis and treatment purposes.In addition, the dye can also be used as organic photocatalyst for environmental or energy-related photocatalytic reaction.The present application provides a new choice for multi-scene optoelectronic functional materials.

This invention discloses a GSH-functionalized carbon dots / rhodamine B ratiometric fluorescence system, its construction method, and its application in nitrite detection. GSH-CDs are synthesized via a one-step hydrothermal method by mixing citric acid, o-phenylenediamine, glutathione, and hydrochloric acid in water. Unreacted precursors and small molecules are removed by purification, and the GSH-CDs are obtained by freeze-drying. The ratiometric fluorescence system is constructed by mixing rhodamine B, GSH-CDs, and an acidic buffer solution. The fluorescence intensity ratio F of GSH-CDs to rhodamine B is established. 460 / F 590 With nitrite (NO2) ‑ A calibration curve between concentrations was obtained, and the NO2 in the actual sample was experimentally detected using the spiked recovery method. ‑ Content. Under acidic conditions, with NO2... ‑ With increasing concentration, the GSH-CDs / RhB fluorescence intensity ratio (I 460 / I 590 Significant changes occurred, with the fluorescence intensity ratio compared to NO2. ‑ There is a good linear relationship between concentrations. Compared with the detection platform based on GSH-CDs, the ratio fluorescence system provided by this invention has a lower detection limit and significantly higher sensitivity.

The invention discloses a baijiu detection method based on a colorimetric and fluorescent dual-signal sensing array, and relates to the technical field of substance detection and analysis. According to the detection method, the principle that rhodamine B and rhodamine 6G have remarkable ultraviolet-visible spectrums and fluorescence characteristic peaks, and rhodamine B and rhodamine 6G can be accelerated to be catalytically degraded by MnONSs under the acidic condition is utilized, so that optical signals (colorimetric-fluorescence double signals) of rhodamine B and rhodamine 6G can be adjusted by adjusting the catalytic action of MnONSs; according to the method, a colorimetric and fluorescent dual-signal sensing array is constructed, then the dual-signal sensing array is utilized to form characteristic fingerprints of various Baijiu samples, rapid and accurate detection of Baijiu is achieved, and the method is few in types of detection materials, simple and convenient to operate and more suitable for large-scale popularization and application.

The application relates to the technical field of metal ion detection, in particular to a fluorescent probe for early metal corrosion detection and a preparation method thereof. 35 H 33 N5O3.The application successfully develops a fluorescent small molecule Rhe-M sensitive to Fe 3+ response, which can be used as a fluorescent probe molecule capable of recognizing early corrosion sites of carbon steel, is applied to a surface layer of the carbon steel, and through irradiation of an ultraviolet lamp, corrosion sites and area sizes on the surface of the carbon steel can be directly observed; the method is simple in operation, sensitive in reaction, low in cost, strong in specific recognition ability, and is a high-efficiency method capable of detecting early metal corrosion sites.

This invention discloses a small-molecule pyroptosis inducer for tumor cells. It utilizes an N,N-diethylimine group as an electron acceptor (A), a rhodamine scaffold as a π-conjugated system, thiophene and triphenylamine groups as the first electron donor (D1) and second electron donor (D2), respectively, and a rotatable vinyl and C-C single bond to increase intramolecular motion, forming a novel A-π-D1-D2 type small-molecule pyroptosis inducer, Rd-TTPA, with enhanced D-A structure and intramolecular motion. This small-molecule pyroptosis inducer can efficiently target tumor cell mitochondria, inducing pyroptosis through ultrasound-mediated reactive oxygen species production. It can serve as an enhanced sonodynamic deep tumor therapeutic agent guided by near-infrared II (NIR-II) fluorescence imaging.

The application discloses a CuS / Cu3(MoO4)2(OH)2 composite and a preparation method and application thereof. The CuS / Cu3(MoO4)2(OH)2 composite material is prepared by using CuCl2, Na2MoO4 and Na2S as raw materials and adopting a hydrothermal method. The CuS / Cu3(MoO4)2(OH)2 composite acoustic catalyst provided by the application can be used for ultrasonic catalytic degradation of organic pollutants in cooperation with H2O2. When the ultrasonic power is 500 W and the ultrasonic time is 30 min, the degradation rates of acid orange 7, tetracycline, rhodamine B, congo red, methylene blue and basic red 2 in water can reach 89.6(±5.78)%, 92.91(±0.36)%, 96.93(±0.16)%, 97.73(±0.61)%, 98.53(±0.37)% and 99.87(±0.18)%, respectively.

This application discloses a fluorescent probe for labeling the outer membrane of Gram-negative bacteria, its preparation method, and its application. The fluorescent probe uses polymyxin (with its hydrophobic tail and two amino acid residue pairs removed) as a targeting group specifically targeting the outer membrane of Gram-negative bacteria. This structure can specifically bind to the lipopolysaccharide structure in the outer membrane, and is then linked to the fluorophore rhodamine, which has switching properties, to design and synthesize a fluorescent dye. This fluorescent probe, possessing fluorescent switching properties, can be applied to super-resolution imaging of the outer membrane of Gram-negative bacteria.

The application belongs to the technical field of laser, and relates to a method for manufacturing a PVA / dye flexible random laser based on an electrostatic spinning method. A mixed solution of PVA, ovalbumin, rhodamine dye and Au nano-particles is adopted, the sample size and the morphology of the spinning structure are controlled by controlling the voltage, the spraying distance and the needle tip size in the electrostatic spinning technology process, and then the wavelength and the mode of laser emission and other parameters are adjusted. The design is simple and intuitive, the method is flexible and convenient, the principle is reliable, and the method is easy to realize. The obtained flexible random laser is easy to be coupled with other photon devices, and the quantitative control of the laser property is easy to be realized.

The invention relates to the technical field of photocatalytic materials, and particularly discloses an efficient FRET-ISC synergistic composite photosensitive nano material based on aggregation-induced emission (AIE) matrix coating, a preparation method of the nano material and application of the nano material in photocatalytic degradation of organic pollutants. The material comprises an AIE characteristic matrix (such as tetraphenylethylene), an energy donor dye (such as coumarin 6) dispersed in the matrix and an energy acceptor dye (such as iodo-boron dipyrromethene) with a heavy atom effect, a donor emission spectrum and an acceptor absorption spectrum are overlapped, so that the synergistic effect of fluorescence resonance energy transfer and intersystem crossing (FRET-ISC) is realized, and the fluorescence intensity of the material is improved. The generation efficiency of singlet oxygen (1O2) is obviously improved. The material is prepared by adopting a microfluidic anti-solvent precipitation method, water-phase dispersed nano-particles (the particle size is 100-400 nm) are formed, the singlet oxygen quantum yield of the material reaches 0.75, the degradation rate constant (0.025 min <-1 >) of the material to rhodamine B is 4.3 times that of a single IBDP system, the degradation rate in 2 hours exceeds 90%, and the activity is kept above 80% after the material is recycled for 5 times. The invention solves the problems of aggregation quenching (ACQ) and narrow spectrum utilization of the traditional photosensitizer, has high stability, wide spectrum response and efficient catalytic ability, and is suitable for degrading organic pollutants (such as RhB, methylene blue and tetracycline) in a water phase.

The invention discloses a preparation method of a water-resistant biomass-based long-afterglow phosphorescent material as well as a product and application of the water-resistant biomass-based long-afterglow phosphorescent material, and belongs to the technical field of functional materials. The preparation method comprises the following steps: taking lignin (soluble components subjected to ethanol grading treatment) and urea as raw materials, dissolving the raw materials in deionized water according to a specific proportion, adjusting the pH value to be alkaline, and carrying out microwave heating to obtain the product. Rhodamine B is added to prepare the red afterglow material. The product shows blue, green and red afterglow under excitation of different ultraviolet lights, and has long afterglow life and excellent water resistance through a hydrogen bond network and a chemical crosslinking structure formed by cyanuric acid. The material is simple and convenient to prepare, low in cost and sustainable, can be applied to the fields of anti-counterfeiting identification, information encryption storage and the like, and can also be compounded with guar gum to be used for 3D printing functional components.

This invention belongs to the field of nanofiltration membrane technology, and particularly relates to a polyamide nanofiltration membrane, its preparation method, and its application. The polyamide nanofiltration membrane provided by this invention includes an ultrafiltration membrane and a polyamide selective layer attached to the ultrafiltration membrane. The polyamide selective layer is formed by a polycondensation reaction of a fully amino columnar aromatic hydrocarbon [5] and 1,3,5-benzenetricarboxyl chloride. The polyamide nanofiltration membrane of this invention can separate organic micropollutants such as Congo red, Rhodamine B, methylene blue, and methyl orange dyes, with a rejection rate of more than 95%. It also has good separation performance for some inorganic salts, with a rejection rate of more than 50%. The polyamide nanofiltration membrane of this invention can adapt to some harsh acid and alkali environments while maintaining excellent rejection performance. The polyamide nanofiltration membrane provided by this invention also has excellent antifouling performance.

The invention discloses a green hydro-thermal synthesis method of a functionalized silver nano-material, and the preparation method comprises a preparation method of a functionalized silver nano-colloid prepared from a sorbus pohuashanensis fruit extract and a preparation method of functionalized nano-silver solid powder. The invention discloses the green hydro-thermal synthesis method of the functionalized silver nano-material. The spherical nano-silver can stably suspend in a colloidal solution, and the material has the bacteriostatic effect (escherichia coli, staphylococcus aureus and candida albicans) and the effect of rapidly removing methylene blue and rhodamine B dye in water. The nano-silver material is spherical, the particle size of the nano-silver material ranges from 14 nm to 70 nm, and the average particle size of the nano-silver material is 36 nm. The sorbus pohuashanensis fruit extract attached and modified in the nano material accounts for nearly 7.0% of the total mass of the nano material. The green hydrothermal synthesis method is high in safety coefficient, convenient and rapid in operation process, small in pollution or free of pollution and high in repeatability, and the method has application and development potential.

The application discloses a preparation method of full-color laser carbon dots based on rhodamine B derivation, which comprises the following steps: ultrasonic dispersion of rhodamine B in a liquid solvent, continuous heating in an autoclave, and preparation of green, yellow, red and near-infrared light carbon dots after filtration, elution, purification and freeze-drying; when rhodamine B is mixed with NaOH or KOH solid, heating is carried out in a beaker to prepare blue light carbon dots; in the application, rhodamine B is used as a precursor, and the carbon dots are synthesized by a solvothermal method; the excellent gain performance of rhodamine B is expanded from orange and red to the whole visible light and near-infrared light region; even the emission effect can be enhanced through cross-linking; the gain performance of the carbon dots is higher than that of rhodamine B, and the carbon dots have higher fluorescence quantum yield, higher radiation transition rate, lower laser threshold and more excellent laser stability.

The application discloses a fluorescent dye tracer method for tracking hydraulic fracturing cracks and application, and the method comprises the following steps: S1, configuring a fluorescent dye solution: using a water-soluble fluorescent dye rhodamine B to prepare a mass-volume ratio aqueous solution with a concentration of 0.01% to 0.05%; S2, pre-treating and cleaning the cracks of a sample: using a hydrochloric acid solution with a concentration of 1% to 3% to acid-wash the cracks of the sample, and then rinsing the sample with clean water; S3, pre-saturating the crack channel: pre-saturating the crack network of the sample; S4, injecting the fluorescent dye solution under low pressure pulse, so that the crack channel is filled with the fluorescent dye solution; S5, soaking and permeating: after the crack channel is filled with the fluorescent dye solution, stopping the injection and placing the sample, and soaking the sample to make the fluorescent dye solution penetrate into fine cracks and pores; S6, observing the dyeing: after the surface of the sample is dried, cutting the sample along the main crack direction to observe the internal crack direction, and performing quantitative analysis by using image processing software.

The application discloses a preparation method of a pyrite particle electrode based on a mechanochemical method, and adopts a normal-temperature wet-type ball milling process to simultaneously perform particle size refining, surface defect construction and nitrogen-doped carbon coating on natural pyrite and defatted soybean powder in an organic solvent, so that the destruction of a crystal form caused by high-temperature treatment is avoided. Then, the obtained composite powder is mixed with acetylene black, and ion cross-linking forming is performed on sodium alginate and calcium chloride in a low-temperature environment, so that a particle electrode with a three-dimensional porous structure is prepared. The method solves the problems of easy agglomeration and loss of the powder and poor conductivity, and the prepared electrode exhibits excellent charge transfer performance and catalytic activity in a 3DERs-PS system, has high degradation efficiency on rhodamine B and good cycle stability, and realizes efficient treatment of organic wastewater.

The invention belongs to the technical field of electrochemical water treatment, and particularly relates to a TiO2-NTs / Ti4O7-NTs / Ce-Sb-SnO2 composite electrode and a preparation method and application thereof.The composite electrode comprises a TiO2-NTs substrate, a Ti4O7-NTs middle layer growing on the surface of the TiO2-NTs substrate in situ and a Ce-Sb co-doped SnO2 active layer coating the Ti4O7-NTs middle layer; wherein in the Ce-Sb co-doped SnO2 active layer, the molar ratio of Sn to Ce to Sb is (8 to 9.4) to (0.5 to 1.5) to (0.1 to 0.5); the composite electrode has a hierarchical structure, the Ti4O7-NTs intermediate layer strengthens interface bonding through an anchoring effect, Ce-Sb double doping synergistically optimizes conductivity and catalytic activity, when the composite electrode is applied to salt-containing organic wastewater degradation as an anode, an electrolysis system is constructed to adjust conductivity, 1-10 V direct current voltage is applied to electrolyze for 0.5-3 h, the rhodamine B degradation rate is higher than 95% within 90 min, the COD removal rate reaches 92%, and the composite electrode can be applied to degradation of salt-containing organic wastewater. The continuous service life exceeds 300 hours, the energy consumption is low, the salt resistance is excellent, and the method is suitable for efficient treatment of salt-containing degradation-resistant organic wastewater in the industries of printing and dyeing, chemical engineering and the like.

The application belongs to the field of photocatalysis, and particularly relates to a preparation method and application of a cadmium sulfide in-situ polymerized maleic anhydride photocatalytic material. In order to overcome the serious photocorrosion phenomenon of single CdS, the application polymerizes maleic anhydride on cadmium sulfide in-situ under the initiation of ultraviolet light by using a sulfur source, a cadmium source and a monomer maleic anhydride as raw materials, so as to obtain a cadmium sulfide in-situ polymerized maleic anhydride photocatalytic material. The material has a strong degradation on rhodamine B under visible light, and the stability and repeatability of the material are also relatively excellent. Meanwhile, the preparation method of the application is simple and safe in process, does not need any external initiator, is mild and green in condition, and is extremely easy to mass-produce, so that the application improves the limitation of the photocatalytic performance of current single CdS, and has an extremely wide application prospect in degradation of polluting dyes.

This invention discloses a near-infrared fluorescent probe for detecting bone regeneration vitality and its preparation method, belonging to the field of biochemistry. Using rhodamine as the fluorescent core, the invention utilizes quinoline ring expansion to increase the conjugated area and extend emission. The brightness and stability of the probe are controlled by adjusting the steric hindrance of the aromatic ring at position 9, constructing a series of stable, high-brightness probe cores with low pKa. By introducing a phosphate ester group as a responder while simultaneously quenching the fluorescence of the core, a near-infrared fluorescent probe, SiRd-MOP, for detecting bone regeneration vitality is obtained. The preparation method of this invention has high yield and mild reaction conditions. The prepared probe can specifically and sensitively respond to alkaline phosphatase (ALP), and has successfully achieved ALP activity monitoring in osteogenic differentiation models and throughout the entire process of fracture regeneration and repair in mice. It can be used for real-time assessment of bone regeneration vitality and has very high biological application prospects.

The application discloses a solar evaporator with an organic dye degradation function and a preparation method thereof, and relates to the technical field of water treatment. The solar evaporator comprises a stand, the top end of the stand is provided with a groove, the groove is provided with an annular baffle, the annular baffle divides the groove into a fresh water tank and a sewage tank, and the fresh water tank is located at the outer side of the annular baffle. The top end of the stand is provided with a transparent cover body, the bottom end of the transparent cover body is arranged at the outer edge of the fresh water tank, and the sewage tank is provided with a 3D porous evaporator with a photocatalysis and photo-thermal conversion function. The application can efficiently evaporate water under the condition of light, and has a remarkable photocatalytic degradation effect on organic dyes such as methylene blue and rhodamine B. The application realizes water purification while efficiently evaporating water, is particularly suitable for the treatment of organic contaminated water, and provides an efficient application technology for the technical field of environmental protection, low cost and multi-functional water treatment.

The application discloses a double-emission ratio fluorescent probe RB@Zr-fcu-sti, a preparation method thereof and application thereof in detection of malachite green (MG). The preparation method comprises the following steps: adding Zr-fcu-sti and rhodamine B into anhydrous ethanol, ultrasonic dispersion, stirring reaction at room temperature in dark, centrifugation, washing, and vacuum drying. The double-emission ratio fluorescent probe RB@Zr-fcu-sti is applied to the fluorescence detection of malachite green, and has high sensitivity and fast response. With the increase of the concentration of the sensing system malachite green (MG), the red fluorescence emission of the probe is significantly quenched, while the intensity of the blue fluorescence emission remains basically unchanged, so that the fluorescence color of the sensing system gradually changes from purple to blue. The detection limit of the application to malachite green (MG) is as low as 2.69nM, and thus the application can be applied to high-sensitivity ratio fluorescence sensing of malachite green (MG).

The invention discloses a sunlight-responsive stirring-free carbon nitride nanosheet photocatalyst capable of efficiently degrading water and surface pollutants. According to the method, melamine is taken as a precursor, KCl is taken as a dispersion medium, defect-state carbon nitride is obtained through high-temperature calcination, chemical shearing and surface carboxylation are carried out through concentrated nitric acid hydro-thermal treatment, and the ultra-dispersed carbon nitride nanosheet is obtained through centrifugal cleaning. The process is simple and low in cost. The size of the obtained nanosheet is dozens of nanometers, the surface of the nanosheet is rich in carboxyl, the dispersity in water is good, and the nanosheet has strong photochemical activity of sunlight response. Under real sunlight, only 50 mu g / mL of a catalyst is needed, stirring and aeration are not needed, and the degradation rate of rhodamine B (the concentration is 75 mu M) and typical mycotoxin aflatoxin B1 (the concentration is 1 ppm) in an aqueous solution exceeds 99% within one hour. And pollutants (including fungaltoxin and dye residues) on the surfaces of traditional Chinese medicinal materials and bulk foods (including peanuts and corns) can be effectively degraded in a spraying or immersing manner.

This invention belongs to the field of photocatalytic materials technology and discloses a method for preparing a BiOCl / BiOI composite photocatalyst for the visible light degradation of Rhodamine B. By synergistically regulating the band structure of BiOCl with BiOI, a highly efficient photocatalytic decolorization of Rhodamine B with a broad-spectrum response is achieved through S-type interfacial charge transfer. The method involves a petal-shaped R=8:1 BiOCl / BiOI heterojunction and BiOCl... 0.88 I 0.12 and BiOCl 0.8 I 0.2 The solid solution exhibits excellent visible light photocatalytic activity, degrading approximately 92.52%, 99.7%, and 99.7% of Rhodamine B molecules after 10 minutes of visible light irradiation, respectively. The catalytic reaction follows a two-stage first-order kinetic model, and high photocatalytic efficiency is maintained even after 5 cycles. The degradation of approximately 64.3% and 10.02% of Rhodamine B molecules by BiOCl and BiOI alone under the same photoreaction conditions follows a first-order kinetic model. This invention has advantages such as low preparation temperature, simple process, and stable chemical properties. Large-scale two-dimensional micro / nanosheets and their three-dimensional self-assembled structures can be obtained through hydrothermal and water bath synthesis processes, making it highly valuable for the visible light degradation of organic pollutants.

The application discloses the technical field of photocatalytic materials, and discloses a water-stable perovskite CsPbI3@PVP photocatalyst as well as a preparation method and application thereof. The preparation method is that a hydrophilic polymer PVP is used as an encapsulating material, CsPbI3 is encapsulated in the hydrophilic polymer PVP, and thus a water-stable perovskite CsPbI3@PVP photocatalyst is obtained. In the application, CsPbI3 is encapsulated in the hydrophilic polymer PVP, and the photocatalytic degradation of CsPbI3 in water is successfully realized. The direct band gap semiconductor CsPbI3 is used in the efficient photocatalytic degradation experiment, and for the first time, the perovskite degradation dye efficiency is improved to 100% rhodamine b degradation in 20 minutes.

The invention discloses high-brightness liquid and solid orange-red light silicon quantum dots as well as a preparation method and application thereof, and belongs to the technical field of chemistry and fluorescent material science. The raw materials are subjected to a one-pot hydrothermal reaction in a water phase to directly prepare the high-brightness liquid-state and solid-state orange-red light silicon quantum dots. Through the mode, the high-brightness liquid-state and solid-state orange-red light silicon quantum dots with excellent luminescence performance and high fluorescence quantum yield can be prepared.

This invention provides a method for preparing and applying a class of Motixafortide-nitrogen mustard conjugates and their fluorescent probes, belonging to the fields of peptide preparation and biomedicine. This invention utilizes a solid-phase peptide synthesis method to covalently link the DNA alkylating agent nitrogen mustard with the CXCR4 targeting peptide Motixafortide, and further couple it with a fluorescent dye, successfully preparing a series of novel conjugates and their fluorescent probes. Experimental verification shows that the Motixafortide-nitrogen mustard conjugates and their fluorescent probes prepared in this invention can significantly enhance the antitumor activity and targeting of nitrogen mustard to tumor cells. Simultaneously, the rhodamine B-labeled dinitrogen mustard conjugate BCCR exhibits specific targeting of the CXCR4 receptor and dual targeting of the tumor cell nucleus. These conjugates enable real-time tracking of the entire process of tumor targeting, cell delivery, and nuclear localization, providing a powerful tool for efficacy evaluation and mechanism research, thus possessing promising clinical translational prospects and application value.

The invention relates to the technical field of fluorescence sensing, in particular to a zinc (II) metal organic framework material for Cu < 2 + > and NB detection and organic dye photocatalytic degradation and a preparation method. The metal organic framework material [Zn (cpt) 2] n based on metal zinc (II) is prepared through a one-pot hydrothermal reaction, the single crystal molecular formula of the metal organic framework material [Zn (cpt) 2] n is C56H36ZnN6O6, a ligand is deprotonated Hcpt, and Hcpt is 4 '-(4-(4-carboxyl phenoxy) phenyl)-4, 2': 6 ', 4' '-terpyridyl. The preparation method has the advantages of mild conditions, simplicity and convenience in operation, high yield, good repeatability and the like. The prepared zinc (II) metal organic framework material has good structural stability and fluorescence characteristics, has high selectivity and sensitivity to Cu < 2 + > and nitrobenzene (NB), and is a good fluorescence sensor for detecting Cu < 2 + > and nitrobenzene; meanwhile, the zinc (II) metal organic framework material has good performance of photocatalytic degradation of organic dye and has a good photocatalytic degradation effect on the organic dye rhodamine B.