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DNA silver nanocluster-metal organic framework composite catalytic material as well as preparation method and application thereof

A metal-organic framework and silver nanocluster technology, which is applied in the preparation of organic compounds, organic compound/hydride/coordination complex catalysts, catalytic reactions, etc., can solve the difficulty of degrading nitro groups, poor stability of DNA silver nanoclusters, Relatively expensive and other issues, to achieve the effect of overcoming instability, easy subsequent recovery, and reducing reaction costs

Pending Publication Date: 2021-01-22
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It is very difficult to degrade nitro groups by traditional methods. It is necessary to find an economical, efficient and environmentally friendly method for the degradation of p-nitrophenol. According to reports, DNA silver nanoclusters can catalyze the reduction of nitro groups by sodium borohydride, but the stability of DNA silver nanoclusters is too poor. Disadvantages such as expensive

Method used

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  • DNA silver nanocluster-metal organic framework composite catalytic material as well as preparation method and application thereof
  • DNA silver nanocluster-metal organic framework composite catalytic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of DNA-AgNCs:

[0029] Add 196.8μl PB (20mM, pH=7.4) to dissolve and vortex after centrifuging 1OD C34, then add 28.8μl, 1mM AgNO 3 Centrifuge at 14000rpm for 30s, add 14.4μl, 1mM NaBH after 10min at room temperature and dark 4 After vigorous vortexing, centrifuge at 14,000 rpm for 30 s and place it in the dark at 4°C for overnight reaction to finally obtain a DNA-AgNCs solution.

Embodiment 2

[0031] Preparation of DNA-AgNCs@ZIF-8:

[0032] Take 80 μl of 10 μM DNA-AgNCs liquid (Example 1) and add it to 72.7 μl of 2-methylimidazole (1.735M) and then add 72.7 μl of zinc acetate dihydrate (86.8mM), mix and react overnight, centrifuge at 5000rpm, recover after 15min The precipitate was washed with ultrapure water and centrifuged three times to remove DNA silver nanoclusters not wrapped by MOFs material, and then stored at 4 °C for future use.

Embodiment 3

[0034] DNA-AgNCs catalytic reduction of p-nitrophenol:

[0035] Take 180μl of 2mM 4-NP and add 180μl of 200mM NaBH 4 Then add 90 μl of 10 μM DNA-AgNCs to mix and react.

[0036] The absorption light of p-nitrophenol by ultraviolet spectrophotometer is at 400nm. As p-nitrophenol is reduced to p-aminophenol, the absorption peak gradually appears at 300nm, while the absorption peak at 400nm gradually decreases.

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Abstract

The invention discloses a DNA silver nano-cluster metal organic framework composite catalytic material as well as a preparation method and application thereof. The composite catalytic material is formed by taking a metal organic framework as a novel immobilized material and wrapping DNA silver nano-clusters in the metal organic framework. After the DNA silver nano-cluster metal organic framework composite catalytic material is prepared, the DNA silver nano-cluster metal organic framework composite catalytic material is added into a nitro-containing solution, and an amino-containing compound isobtained through a catalytic reduction reaction. The composite catalytic material provided by the invention can efficiently catalyze nitro-containing compounds, has good thermal stability and chemical stability, can be recycled for multiple times, and maintains high catalytic activity at the same time.

Description

technical field [0001] The invention relates to a composite catalytic material, in particular to a DNA silver nanocluster-metal organic framework composite catalytic material and its preparation method and application. Background technique [0002] Environmental priority pollutants refer to the classification and arrangement of many toxic pollutants, from which the pollutants with high potential hazards and high frequency of occurrence in the environment are selected as monitoring and control objects, and the pollutants that have been preferentially selected become environmental priority pollutants. p-nitrophenol (p-nitrophenol, p-NP) is an environmental priority pollutant, and widely exists in industrial wastewater such as pesticides and dyes, it is difficult to degrade in nature, and has carcinogenic, mutagenic, teratogenic "Three to" role. As an important raw material and intermediate product, p-nitrophenol is widely used in the industrial production process. The dischar...

Claims

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Application Information

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IPC IPC(8): B01J23/50B01J31/22B01J33/00C07C213/02C07C215/76
CPCB01J31/1691B01J31/1815B01J23/50B01J33/00C07C213/02B01J2231/641B01J2531/26C07C215/76
Inventor 黄和李昺之张幸吉峙润林蕾纪元徐晴
Owner NANJING NORMAL UNIVERSITY
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