Search

CN-122011405-A - For Cu2+Zinc (II) metal organic framework material for NB detection and photocatalytic degradation of organic dye and preparation method thereof

CN122011405ACN 122011405 ACN122011405 ACN 122011405ACN-122011405-A

Abstract

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 photocatalytic degradation of organic dye and a preparation method thereof. The invention adopts one-pot hydrothermal reaction to prepare metal-organic framework material [ Zn (cpt) 2 ] n based on metal zinc (II), the single crystal molecular formula of which is C 56 H 36 ZnN 6 O 6 , wherein the ligand is deprotonated Hcpt, and Hcpt is 4' - (4- (4-carboxyphenoxy) phenyl) -4,2':6',4' ' -terpyridine. The preparation method has the advantages of mild condition, simple operation, high yield, good repeatability and the like. The zinc (II) metal organic framework material prepared by the method has good structural stability and fluorescence characteristics, has high selectivity and sensitivity to Cu 2+ and Nitrobenzene (NB), is a good fluorescence sensor for detecting Cu 2+ and nitrobenzene, and has good photocatalytic organic dye degradation performance and good photocatalytic degradation effect to organic dye rhodamine B.

Inventors

  • SONG JUAN
  • ZHOU JIAMI
  • ZHANG LIANG
  • ZHOU YUNLONG

Assignees

  • 陕西理工大学

Dates

Publication Date
20260512
Application Date
20260127

Claims (8)

  1. 1. A zinc (II) metal-organic framework material, wherein the chemical expression of the zinc (II) metal-organic framework material is [ Zn (cpt) 2 ] n , and the single crystal molecular formula of the zinc (II) metal-organic framework material is C 56 H 36 ZnN 6 O 6 .
  2. 2. The zinc (II) metal-organic framework material of claim 1, wherein the ligand (cpt) - in the chemical formula of the zinc (II) metal-organic framework material is deprotonated Hcpt and the Hcpt is 4' - (4- (4-carboxyphenoxy) phenyl) -4,2':6',4 "-terpyridine; the structural formula of Hcpt is as follows: 。
  3. 3. The zinc (II) metal-organic framework material of claim 1, wherein the zinc (II) metal-organic framework material is monoclinic, the space group is P2/c, and the unit cell parameters include a= 12.24424 (19) a, b= 6.38823 (7) a, c= 31.6860 (4) a, a=90° a, β= 100.5124 (14) a, and γ=90° a.
  4. 4. A process for the preparation of a zinc (II) metal organic framework material according to any one of claims 1 to 3, characterized in that it comprises the following steps: S1, mixing distilled water and acetonitrile to obtain a mixed solution, dissolving Hcpt and divalent zinc metal salt in the mixed solution, stirring at room temperature to fully react to obtain an intermediate product, transferring the intermediate product into a reaction kettle, and fully reacting at constant temperature to obtain a reaction product; S2, cooling and crystallizing after the reaction product is cooled to room temperature, washing, decompressing, filtering and drying to obtain the zinc (II) metal organic framework material.
  5. 5. The method according to claim 4, wherein the divalent zinc metal salt in S1 is Zn (NO 3 ) 2 ), the time for the stirring and the sufficient reaction is 30min, the lining of the reaction kettle is polytetrafluoroethylene, the temperature rising rate of the reaction kettle is 5 ℃ per hour, the temperature for the constant temperature and the sufficient reaction is 160 ℃, and the time for the constant temperature and the sufficient reaction is 3 d.
  6. 6. The method for preparing a zinc (II) metal organic framework material according to claim 4, wherein the volume ratio of distilled water to acetonitrile in the mixed solution in S1 is 2:1, and the dosage ratio of Hcpt, divalent zinc metal salt to mixed solution is 0.05~0.1 mmol:0.05~0.1 mmol:9mL.
  7. 7. The method for preparing a zinc (II) metal organic framework material according to claim 4, wherein the cooling rate in S2 is 5 ℃ per hour, the washing detergent is absolute ethanol, the drying temperature is 60 ℃, and the drying time is 3 h.
  8. 8. Use of a zinc (II) metal organic framework material according to any one of claims 1 to 3, wherein the zinc (II) metal organic framework material is used for fluorescence detection of Cu 2+ and NB, and for photocatalytic degradation of rhodamine B.

Description

Zinc (II) metal organic framework material for Cu 2+ and NB detection and photocatalytic degradation of organic dye and preparation method thereof Technical Field 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 photocatalytic degradation of organic dye and a preparation method thereof. Background Along with the rapid development of industrialization, the combined pollution formed by heavy metals and organic pollutants in the water body forms a serious threat to the ecological environment and human health. Wherein copper ions (Cu 2+) can accumulate in human body through food chain, excessive intake can cause liver and kidney injury and neurotoxicity, and Nitrobenzene (NB) is used as typical industrial poison and has cancerogenic and mutational risks. Likewise, the emission of various types of organic dye pollutants is another major threat to the ecosystem and human health. The pollutants have the characteristics of strong chemical stability, high durability and difficult natural degradation, so that the pollutants are particularly difficult to treat. At present, conventional detection techniques for targets such as Cu 2+ and NB depend on large-scale instruments, and the problems of complex operation, high cost, difficulty in quick on-site detection and the like exist. Therefore, the development of a novel detection method with high sensitivity, high selectivity, quick response and simple operation has great practical significance. In recent years, metal Organic Frameworks (MOFs) are a research hotspot in the field of fluorescence sensing due to their adjustable structure and excellent luminescence. The fluorescent probe based on MOFs can realize high-selectivity identification of the target object through the specific change of the luminous intensity, has the outstanding advantages of low cost, quick response, convenience in visual monitoring and the like, and provides a new scheme for environmental trace detection. The photocatalysis technology is a green and efficient advanced treatment means facing the organic pollutants which are difficult to degrade. In particular, transition metal-based metal organic framework materials are used as photocatalysts, and the photocatalysts have remarkable potential in enhancing light absorption and promoting active oxygen generation due to the unique structural and electronic properties, can be activated and generate active oxygen under illumination, so that complex dye molecules are decomposed into simple compounds with less harm, and an effective way is provided for purifying organic pollutants. The integration of fluorescence sensing and a photocatalysis system enables a single material to detect and degrade organic pollutants. This innovative strategy greatly promotes the development of sustainable water treatment technologies. Disclosure of Invention Aiming at the defects of the prior art, the invention provides the zinc (II) metal-organic framework material for Cu 2+ and NB detection and photocatalytic degradation of organic dye and the preparation method thereof, wherein the preparation method has the advantages of mild condition, simple operation, high yield, good repeatability and the like, and the prepared zinc (II) metal-organic framework material has good structural stability and fluorescence characteristics, high selectivity and sensitivity to Cu 2+ and NB, is a good fluorescence sensor for detecting Cu 2+ and NB, has good photocatalytic organic fuel degradation performance and has good photocatalytic degradation effect to organic dye rhodamine B. The invention provides a zinc (II) metal organic framework material, wherein the chemical expression of the zinc (II) metal organic framework material is [ Zn (cpt) 2]n, and the single crystal molecular formula of the zinc (II) metal organic framework material is C 56H36ZnN6O6. According to the zinc (II) metal-organic framework material provided by the invention, a ligand (cpt) - in a chemical expression of the zinc (II) metal-organic framework material is deprotonated Hcpt, and the Hcpt is 4' - (4- (4-carboxyphenoxy) phenyl) -4,2':6',4' ' -terpyridine; the structural formula of Hcpt is as follows: 。 According to the zinc (II) metal-organic framework material provided by the invention, the zinc (II) metal-organic framework material is in a monoclinic system, the space group is C2/C, and the unit cell parameters comprise a= 12.24424 (19) a, b= 6.38823 (7) a, c= 31.6860 (4) a, a=90° a, β= 100.5124 (14) ° a and γ=90° a. The invention provides a preparation method of the zinc (II) metal organic framework material, which comprises the following steps: S1, mixing distilled water and acetonitrile to obtain a mixed solution, dissolving Hcpt and divalent zinc metal salt in the mixed solution, stirring at room temperature to fully react to obtain an intermediate product, transferring the intermediate product into