Hydrogen peroxide detection method based on ferriporphyrin two-dimensional MOFs enzyme-like catalysis

A hydrogen peroxide detection, iron porphyrin technology, applied in the field of environmental detection, analytical chemistry, can solve the problem of catalytic activity reduction

Inactive Publication Date: 2020-08-04
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But a single iron porphyrin is prone to oxidative degradation or irreversible aggregati

Method used

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  • Hydrogen peroxide detection method based on ferriporphyrin two-dimensional MOFs enzyme-like catalysis
  • Hydrogen peroxide detection method based on ferriporphyrin two-dimensional MOFs enzyme-like catalysis

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Embodiment 1

[0022] (1) To prepare Cu-FeTCPP 2DMOFs mimic enzyme, 0.01mmol copper nitrate trihydrate (Cu(NO 3 ) 2 ·3H 2 O, or CuCl 2 2H 2 O) and 10.0 mg of polyvinylpyrrolidone (PVP) were dissolved in N, N-dimethylformamide and absolute ethanol in a mixed solution with a volume ratio of 3:1, which was designated as solution a; then 0.005 mmol tetrakis (4- Carboxyphenyl)iron porphyrin (FeTCPP) was dissolved in 4mL of N,N-dimethylformamide and absolute ethanol mixture, which was designated as solution b. Add solution b dropwise to solution a, the volume ratio of solution b to solution a is 3:1, then add 20 μL of trifluoroacetic acid (1.0 M), ultrasonically mix and react at 80°C for 3 h to obtain a two-dimensional metal Organic framework material Cu-FeTCPP 2DMOFs.

[0023] The prepared Cu-FeTCPP 2DMOFs has an ultra-thin two-dimensional lamellar structure with a thickness of 8-20nm and a specific surface area of ​​36.78m 2 / g, the aqueous solution is light brown; it has good affinity with...

Embodiment 2

[0027] (1) To prepare Cu-FeTCPP 2DMOFs mimic enzyme, 0.01mmol copper nitrate trihydrate (Cu(NO 3 ) 2 ·3H 2 O, or CuCl 2 2H 2 O) and 10.0 mg of polyvinylpyrrolidone (PVP) were dissolved in N, N-dimethylformamide and absolute ethanol in a mixed solution with a volume ratio of 3:1, which was designated as solution a; then 0.005 mmol tetrakis (4- Carboxyphenyl)iron porphyrin (FeTCPP) was dissolved in 4mL of N,N-dimethylformamide and absolute ethanol mixture, which was designated as solution b. Add solution b dropwise to solution a, the volume ratio of solution b to solution a is 4:1, then add 15 μL of trifluoroacetic acid (1.0 M), ultrasonically mix and react at 80°C for 4 hours to obtain a two-dimensional metal Organic framework material Cu-FeTCPP 2DMOFs.

[0028] The prepared Cu-FeTCPP 2DMOFs has an ultra-thin two-dimensional sheet structure with a thickness of 5-15nm and a specific surface area of ​​41.26m 2 / g, the aqueous solution is light brown; it has good affinity wi...

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Abstract

The invention provides a hydrogen peroxide detection method based on ferriporphyrin two-dimensional MOFs enzyme-like catalysis, and belongs to the field of chemical and environmental detection. According to the method, copper-tetracarboxyl phenyl ferriporphyrin two-dimensional MOFs (Cu-FeTCPP 2DMOFs) are used as a catalyst, and 3, 3 ', 5, 5'-tetramethyl benzidine (TMB) is used as a color developing agent. The Cu-FeTCPP 2DMOFs contain a structure-FeTCPP similar to a prothetic group of peroxidase so that an ultrathin two-dimensional structure has a large specific surface area and good affinity with hydrogen peroxide and TMB, high horseradish peroxidase-like catalytic activity is possessed, and H2O2 is catalyzed to oxidize TMB into a blue color development product. According to a colorimetric detection method, a linear detection range of H2O2 is 3-1000 muM, a detection limit can reach 2.08 muM, and the method has a considerable application prospect in an aspect of H2O2 detection.

Description

technical field [0001] The invention relates to a hydrogen peroxide detection method based on iron porphyrin two-dimensional MOFs enzyme catalysis, which can be applied to the fields of analytical chemistry and environmental detection. Background technique [0002] Hydrogen peroxide (H 2 o 2 ) as a cheap and effective oxidizing agent, bleaching agent and preservative, are widely used in the fields of chemical industry, aerospace, bleaching and sterilization, food and medical treatment. However, excessive hydrogen peroxide will cause environmental pollution. The active free radicals generated by its decomposition can damage cell organelles, protein structures, break DNA molecular chains, harm organisms, and threaten human health. Therefore, it is of great significance to establish an efficient hydrogen peroxide detection method. At present, the commonly used detection techniques for hydrogen peroxide include chemical titration, colorimetric sensing, high performance liquid...

Claims

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Application Information

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IPC IPC(8): G01N21/78G01N21/31
CPCG01N21/78G01N21/31
Inventor 赵莉芝张玉忠赵雅香李日舜佀迪迪
Owner TIANJIN POLYTECHNIC UNIV
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